Highest flowing bbc heads. 88 Exhaust Valves installed.
Highest flowing bbc heads That being said, the biggest head put out the least power, again, goes back to the combination, not a single Dec 20, 2007 · I was taught years ago that an open chamber head flows better than a closed chamber head, because closed chamber shrouds the valves and impedes flow. 5 to 1 compression Solid roller cam tbd Edelbrock Victor Ram with dual dominator TH400 with 5000ish stall converter Car weight about 2400 to 2500 with me in it Dart 355 or AFR 357 heads are out of my budget. Mar 23, 2017 · Need the block casting number. 200 144 121. Cam 242/248 . This head requires pistons, valve covers, head studs, shaft rockers, and an intake manifold designed specifically for the SR 20. Sep 6, 2009 · Old thread, but it suits my questions. The data says they are one of the highest flowing heads Chevy ever made, and compare well with a lot of aftermarket aluminum head flow rates. Mar 1, 2008 · Check out this 496 Chevy Big Block Engine get tested with Edelbrock Performer RPM Cylinder Heads and Dart Cylinder Heads other cylinder heads are TFS, Brodix, GM and Pushrod, Featured in Car Craft Sep 19, 2008 · as mentioned before there are all good heads but the biggest piece to the puzzle is the intake. * Among the oval heads, the GMPP heads are probably all-around second to the Darts (surprising!). Oct 17, 2009 · bes sells a set of heads that are great priced for what you get,they flow 360 cfm and are 3200. 90/ 4000lbs RW 11. If you can do the head work yourself. I was told these 487 heads were used on both Corvettes and Z28 Camaro engines around 1971. Sep 7, 2018 · New from AFR – the 457cc 18° Big Block Chevy cylinder heads. I know REV's products well. ALL Pegasus “Assassin” cast heads are 100% Made in the USA from A356 T6 Aluminum ALL Pegasus “Assassin” heads are 18 bolt design to provide the strongest clamping force possible. These heads are best suited for large displacement (540+) high RPM Big Block Chevrolet racing engines. Lots of the heads out there are too big for a less-than-serious engine. along with the combination of moving the valves to 18 degrees, Magnum 18 degree cylinder head will flow a whopping 498 cfm of air through the intake ports at 1. 900" off of the deck depending on port design. This also is usually where these head designs flow best. Since they are taking up the slack in the market when it comes to iron heads has anyone compared the Chrysler Magmun head to the now extinct RHS INDY X head. CJHP or CJR intake port 375cfm @. It seems that TFS 365 heads are an affordable alternative. CJ exhaust 245+ cfm depending on valve size. Dart 540, AFR 315s, Crane gold rockers, Morel Hyd lifters, Vic Jr, Pro Systems 1000HP, Crane Ignition, Jakes Performance TH400, and one tiny cam. Jan 26, 2014 · 702 heads w/ 98cc chambers yielding 10. All Big Duke series heads require special pistons, valve covers, head studs, shaft rockers, and intake manifold. The first one is the assembled Merlin oval port cast iron head, with a 269cc intake volume, a 119cc combustion chamber, 2. Mar 11, 2010 · BBC head flow including the new AFR 290cc I just got my Brezinski set up in a decided to flow as many heads BBC heads as possible. It's an interesting valve job they do. 90 to 13. Sep 3, 2010 · Steve, for the coin i'd say the Indy EZs, they flow right around 290 OOTB & can be opened up to a max port window quit easy & then they will flow 320+ with no other work, thats a bolt-on, now indy had a special way back for 1800. 70@112mph. 850 exhaust valve. lift with 457cc runners, 90cc combustion chamber, and 143cc exhaust. 315 bore or some stock junk block. CALL FOR PRICING The 385cc heads are AFR's largest and best flowing BBC heads! They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings, Titanium retainers, and high quality components throughout. 600ish bore Oct 2, 2008 · Merlin Cast Iron 269cc BBC Cylinder Head, Merlin III Cast Iron 320cc BBC Cylinder Head World has a couple of BB heads that are perfect for the budget builder. A series flow block can be converted to parallel flow by drilling 3 holes in each deck surface, and then use parallel flow head gaskets. Not at pump piss levels! How can you give info on 8000 plus rpm engines but yet no proof of one in your examples. AFR strongly recommends material be removed from the piston and not the cylinder head. Drivers side rear of the block on the top of the bell housing flange. Same Apr 11, 2012 · as far as flow numbers are concerned i didnt reallly know if the numbers were good or bad considering you look at aftermarket heads that are flowing over 300 cfm, i know i could get more out of them with bigger valves but i dont really know if thats needed for what im trying reach. 300 intake is a tough order, especially an American head. The RFD BBC-BILLET promises to be one of the baddest Big Block conventional heads available. "Best flowing" is speculative. 800 exhaust valves. Apr 23, 2021 · speedmaster is a chinese head. CC them and see if they are around 119. While the flow numbers look lower on the AJPE heads, the ports are re-designed to equalize the flow into the chambers. Part Number: AFR-3002 Estimated Ship Date: Jan 31, 2025 Jun 15, 2020 · I just wanted to share my experiences with these heads so others can evaluate what I dealt with and decide if they are worth their investment. 300 193 141. Joined Mar 4, 2007 · The question is who today builds a stock block bbc limited to a 4. May 2, 2010 · im building a 396 . 400 intake valves and 1. Here are the numbers enjoy. This head features raised 540 cc intake ports that flow over 588 cfm, and exhaust ports that flow over 354 cfm! This head utilizes a newly designed, efficient combustion chamber that measures 66 cc. FLOTEK High Performance Cylinder Heads 1712 Read Street, Evansville, IN 47710 Phone: 1-800-270-0095 I Fax: 812-421-0983 Nov 17, 2012 · The BBC head does look like a nice piece and a close cousin to the RHS head. Designed around raised intake runner locations with the floor of the port as much as . Flow data based on Cylinder #1 intake and exhaust port. Feb 25, 2014 · Just doing the head swap alone I dropped a second off my e. They feature an oval intake port design that produces excellent low and midrange torque and horsepower This style conventional big block Chevy head is a bridge between standard conventional big block heads and spread port heads, 20* and 18* valve angle. 4-273 Dart’s PRO1 Big Block Chevy Cylinder Heads are engineered to deliver exceptional performance for high-revving large displacement combinations. The BRODIX Head Hunter series represents the cutting edge of conventional big block technology. The B1-B/S heads are nice, but seem to be fairly expensive, and unported they flow less than 300 cfm. 125" OD Victory 1 Titanium intake valves Apr 13, 2008 · I just looked up the prices of the CNC'd AFR BBC heads, and WOW! Those suckers are expensive! What makes them so much more expensive than the small block heads? Their CNC'd BBC heads are around $3200, where the CNC small block heads are around $1800. *69 SS 502 EFI /224-228* HR/9. The intake port is raised . Nov 14, 2013 · The STOCK BBC heads are a solid foundation. 9:1 and all else being the same my car ran 11. Forged steel cranks have it right on the side of the number 1 rod throw. 90@113 MPH My 1964 Big Block Corvette Gasser. “That is because the more streetable camshafts will not have extremely high lift. 19 and 1. Even so, the valve angle has been rolled 2° flatter toward the piston. 350 valve, this head will support big cubic inches and Big power that will not break the bank and will shock your competition and ours. . Chevy Factory BB Heads had a bad exhaust design to start. This is especially true when 2. His 11:1 468 powered his almost 3900 lb. Nov 19, 2020 · As you can see by the flow numbers, these new CNC-ported heads are a significant improvement over the previous big-dog Merlin cast-iron cylinder head. Jan 18, 2018 · “Flow numbers are meaningful in a street engine, but the low-lift flow numbers will be more meaningful, ” said McInnis. Jun 19, 2016 · This shit aint hapn on pump piss or 4. Nov 10, 2021 · I have 487x heads on my '39 Chev SBC roller motor. ALL Gen 5 and Gen 6 engines are Parallel Flow. guy paid 5k for complete engine. 250 stroke x 4. AFR would like to congratulate you on your purchase of the highest flowing and strongest castings currently offered in a “production” style BB Chevrolet cylinder head. 25 intake 1. Click here for more details or check out the June issue of Super Chevy Magazine Feb 4, 2008 · The flow rates are comparable to the big name heads. Flow measured at 28" of depression. Most, but NOT all Mk IV engines are Series Flow. These heads, when properly installed and maintained, will generate impressive power figures and provide you with years of trouble free service. 06 int and 1. The 315cc heads are AFR's largest and best flowing BBF heads! They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings, and high quality components throughout with . A proper valve job, some fairly easy work with a grinder below the valves (after lots of research) can make the heads flow more than your 402 can reasonably use. That is why the Pro Elite heads are designed for stock-style valvetrain components. 1 3 of 6 Go to page. Hopefully they will not have production issues like RHS did when the took on the topline head deal. I have built 482" big block Chevys with stock, 781 oval port heads and made from 700 to 750 HP, and over 650# feet of torque. Aug 1, 2007 · I've run both the AFR 357 and AJPE Billet. Oct 8, 2008 · The Shocker 370cc full CNC ported is the Big Dog in our BBC line. Trick Flow® PowerOval® 280 Cylinder Heads for Big Block Chevrolet TFS-4131T003-M13 Cylinder Head, PowerOval® 280, Aluminum, Assembled, 113cc Chamber, 280cc Intake, Chevy, Big Block, Each Part Number: TFS-4131T003-M13 Aug 20, 2011 · You need to figure out what the airflow requirements for your engine are and go from there. 19/1. 100 81 75. :smt078 Jan 25, 2023 · You can make a really nice set of heads for a lot less than a new set of alum heads. The vane is really steep in the last 3/4" or so, about same angle as valve stem. Trick Flow BBC 280cc PowerOval Bare Cylinder Head Casting, Big Block Chevy, Hydraulic Roller, 113cc Chamber SKU: TFS-4131B001-M13. 370" for the Fel Pro 17040 head gasket and the deck drilled for the extra coolant passage, Trick Flow says these mods would not effect being able to use this head. Designed for 540 ci and larger racing engines, AFR Cylinder Heads Menu Toggle. I'm sure others have as well. 030 over, friend of a friend so I "trust" his claim, but who really knows, mild cam, ran strong shifting at 6,600rpm, 2 bolt main, holley 750 double pumper with the horn milled off, edelbrock performer rpm Mar 8, 2017 · Just make sure when you say Hi to the RPM heads, you choose the proper components, as Edelbrock offers their top-end upgrades for both flat-tappet and hydraulic roller cams. So what are the right heads for a […] May 9, 2015 · Hi what is the the best flowing bbc stock exhaust location head on the market today ,i can rember reading somewere in last year or so new head was about to come on to market step up from the older brodix race rites just not sure who it was any help please , new motor going be 540 cui pump gas hyd roller 6500rpm max target hp 700-750 honest hp, with vacum for brakes, dont want header clearance Feb 24, 2022 · Most of these other other heads use offset rocker arms, but the TF 240 recommend the HS rockers which are about the same expense as rockers for these other heads. weldtech. Sold individually. 51 @ 161 mph on stock suspension 1. Even buying a pair of bare heads and providing your own hardware seems tough to me. 88 valves on the open chamber ovals he flowed. 500 bore engine He did that head like 20 years ago I am sure he could get some pretty impressive numbers with a 990 head and 20 years experience Apr 9, 2009 · The machine shop I use keeps records of the heads he has flowed. The Magnum 18 heads flow an impressive 498 cfm at 1. 5 out of 5 stars. Jan 31, 2025 · AFR 335cc Enforcer BBC Cylinder Heads 3002 AFR-3002. Anyhow my heads had 2. They are Procomp heads. 500 in. 350 bore except a low buck bracket racer, when 99% of the aftermarket race heads today are designed to be atop an aftermarket block and 4. RFD has taken this new casting and built several custom versions: fast bracket, truck pull, all out etc. 30 valvecustom ported. My 1970 SS454 LS6 SuperCar certified stock appearing 11. Not Yet Reviewed Jun 25, 2012 · "522 bbc conventional headed CSU blow thru carb" 1. i almost bought a blown 496. Crankshaft casting/forging numbers. The 385cc heads are AFR's largest and best flowing BBC heads! They feature 100% CNC ported intake, exhaust & chambers, no parts, A356 aluminum castings, Titanium retainers, and high quality components throughout. Our combustion chamber shapes are very critical to flow and altering the cylinder head can adversely affect flow and power production. I review an AFR 265 BBC head and flow it on my flowbench and share the numbers. 3-208. 310”) as well as As Cast or CNC port race version by Darin Morgan - (DM 500) (designed to work with 4. Warranty Find Trick Flow® PowerOval® 280 Cylinder Heads for Big Block Chevrolet and get Free Shipping on Orders Over $109 at Summit Racing! Trick Flow® PowerOval® 280 cylinder heads for big block Chevy are an ideal upgrade from factory cast iron heads for street/strip and marine applications. 19 intake valves are installed. fyi they respond well to 2. * The Canfield and Merlin VR heads have similar intake flow at 0. or larger race engines. 8:1/T56/3. Set one was a 215 closed chambered heads comp ratio of 8. They feature an oval intake port design that produces excellent low and midrange torque and horsepower, plus more efficient Sep 1, 2009 · Air Flow Research. BBC exhaust 284cfm @. is why I mention it May 2, 2017 · I had a pair of 049 Heads Reworked years back. The PB 1803 utilizes an as-cast intake port that delivers outstanding out-of-the-box performance. ) The ones like these with the etched numbers are all done that way so various small companies can market them as their own private label on the box. 250” – 4. 450-inch lift… you get the picture. Its hard to believe the before and after dyno that was done on the stock 1986 454 motor. The head has a cnc Aug 18, 2013 · I finally flowed some Brodix Head Hunter BBC heads they are the 383cc with the moved centerline Here is the flow INT Long. Have wait and see what kind of power they make, when some engines are actually built with them. Mar 5, 2008 · Except for the chamber cc difference, are these heads basically the same, or is there a chance that the 049's are a better head? Don't they both have 2. 06/1. Chevelle to a best of 10. Top End Combos; LS Compatible Heads Menu Toggle. the heads were on there engine masters 434 Save Share Reply Quote Like Mar 26, 2021 · A 3K limit on a bbc head with a 2. An extreme example would be a sixties Alfa Romeo twin cam 8 valve 4 cyl. It has a real wide 40* top cut and a big blending radius. Jan 1, 2004 · The highest flowing head they actually put on a car was the 291 head used on the 70 LS-6. Featuring 255cc Intake Runners for 387+ cfm of flow, 68cc Chambers, and 290+ cfm Exhaust Ports - these heads make serious power! Designed for 4. The IDT 1600 wedge heads are still "science fiction" at this point. Conversely, a flat top or dished piston allows for a smoother flow. Apr 16, 2006 · The flow info for them is here and probably over at Team Camaro too if you do a long search for it at both places. But there were some that flowed over 310 on the intake also. 0 with 2 1/8pipe was 317 No this is not a mistake the short runner out flowed the long. Jun 25, 2009 · You'd be hard pressed to find a n/a BBC topped with factory cast iron heads that made more power than Ed Bigley's. The AFR is a "roval" head and most aftermarket intakes are oval ports. RHS designed these heads to flow big numbers without the need for crazy, exotic parts up top. 650 lift), but when combined with exceptional mid-lift flow and an efficient chamber design, the AFR's 345cc BBC cylinder head is recommended for radical street/strip, "Pro Street," or racing applications with displacements up to 572 cubic inches, operating at or below 7000 RPM. 1 4 of 6 Go to page. 030 over , i just bought the pistons, icon forged 20cc dome, that should give me a lil over 10. 800 exh and mild portlast set i had flowed 262 int and 197 exh stock,i have seen chambers from 113cc to 118ccwork great on 470ci Nov 27, 2006 · HERE are some bbc head flow #'s,the 063's are basically the same as 290's chaqmber size/design/flowise so here are some supposedly decent flow #'s that represent 215's that are supposedly like 063's which are like 290's. 72 exhaust valves with our valve job and blend. up. If someone pulls off one set of heads and replaces it with another and picks up that kind of power, the original config wsa poorly thought out. Feb 20, 2012 · All good aftermarket heads aren't 5 HP apart if the companion parts are correctly specified. If you want to make 1000 hp you wouldnt be messing with conv bbc heads. 450 253 184. These heads may well provide enough air flow with a little reworking and actually be better than a large runner head in some cases. pro comp heads, an intake valve head popped off in his driveway at idle. 19 valve and performance valve job will flow over 300cfm and that's 700hp potential. 675 lift, 234, 244 at . 310 bore tomorrow, I already had the bench set up for a 4. Feb 19, 2004 · This head offers the highest average intake port flow and the highest peak flow numbers. Jump to Latest 41 - 60 of 109 Posts. You can use the parallel flow gaskets as templates for locating the additional holes. 550 262 210 AFR's 335cc BBC Enforcer Cylinder heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. 250 or . Nov 28, 2024 · Im in the process of building a BBC race engine. They even offer a set of RPM, oval-port heads with small (102cc) chambers to maximize the static compression on these low-compression, flat-top piston, factory big-blocks. with a little home port work a week later on the closed chambered wore out heads VR240 CNC Highport 20° Cylinder Heads are some serious heads for your Small Block Ford. Last set of 320 aluminum heads I got from them had that same fancy super ligh flow valve job. 30 valve"that's a broad reaching question. Go. AFR has released an all new 375 cc Magnum Series BBC head, the largest and highest flowing BBC product in its line-up with flow numbers that are closer to 18 degree Pro-stock style heads. 51 @ 161 mph on back up pass 275 radials, 3,350lbs on c16 Jun 12, 2008 · They have 2. Lift Intake exhaust (215 heads flowlike 063's). Dec 24, 2012 · Kasse Hemi heads are the easiest way to make horsepower. I don't know what Indy has in a stock port size head, or what they flow. From the limited porting and flowing I've done on Rect. You can get those cutters from Comp. Featuring high velocity, PRECISION As-Cast ports and optional CNC or AS-Cast Chambers The Sniper line can make some serious HP. 600-inch valve lift with great mid-lift flow numbers. Jump to Latest 61 - 80 of 109 Posts. Cylinder heads are available fully assembled or as bare castings. They look different the Pro Comp heads, but the 320cc casting is suspect. ago, it came with heads, pushrods, head gaskets if i'm not mistaken, these heads OOTB with the small window will support 600-650 To allow for the newly designed 95 cc combustion chamber, the intake valve angle of this head has been rolled to 20 degrees. Jun 17, 2022 · With 2 sets of BBC heads I tested that were both ported, both had 2. 600” bore engines) some exceptional performance outcomes have already been had. Mar 16, 2011 · As far as the RHS heads, that's just messed up. I will flow it on a 4. Eff China. The heads include top-of-the-line CNC Competition Ported runners with a high resolution finish for maximum airflow and power and are assembled with the highest quality valvetrain components for ultimate endurance in all operating conditions. chinese castings used to be junk. 625 raised exhaust port locations. Apr 27, 2012 · These Heads and 7 other BBC heads were tested in the June issue of Super Chevy Mag. 310 bore and no exhaust pipe attached. The all new DN-9 represents the latest in cylinder head technology. A Stroker Short-Block Plus These Bad Boys = 763 to 810 HP on 100-octane. With air-flow and air speed, light years ahead of any other heads in its class, the DRM-20 supplies power gains of 80 hp to 100+hp! The RM 20 components include: Flows more air per valve size than any other conventional cylinder head! Proprietary RMRE CNC Porting. They also come with pressed in head stud washers and head stud tubes that seal the studs that are in the intake ports. This head would be best fitted on a big-inch street big block using a large cam that could take advantage of this head’s high lift flow potential. Heads are designed for 3/8" pushrods. 600. don’t be fooled by Oct 16, 2018 · So aftermarket head companies stuck to this number to go along with available piston designs. chinese VALVES are not to be trusted. you can have all the bells and whistles for head but if that intake flows shit your heads are shit. killer intake that matches killer heads=killer power. This heads would be especially good on a larger displacement big-block in the 502ci and larger range with a big roller cam. heads were cast in 1974 for 454's. AFR's 335cc BBC Enforcer Cylinder heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. I have saw several 470-485 bbc deals make 1000 plus hp. I use them for those. 72 exh as bill said, . I've gotten well over 400cfm with a BB Chev head and 2. 19 Intake, 1. 500 255 195. I flowed all of these on a 4. AFR Magnum 18 Degree 457 cc Big Block Chevy head are the highest flowing head offering from AFR for Big Block Chevy engines. lift. Whether you need that much intake flow may be debated. Nov 24, 2022 · Highest flowing bbc heads. 2 compression once the block is decked and i plan on goin solid roller for the cam, i need some flow numbers for the 802 heads i have so i can hone in on what cam i should run. in. Yes, this is the head everyone has been talking about. 050, Lemons Headers, Holley Multiport Fuel Injection, TCI 6X 6Speed Automatic, 12 bolt Posi Eaton TruTrac, 3:31 Richmond Gears, front and rear power disc brakes, Global West Suspension, etc. AFR Magnum BBC 18° Cylinder Head 457cc fully CNC ported, 90cc Chambers, w/ductile iron seats & steel valves, Competition Package, Assembled. 550 lift – that is, at about the max lift that plan to run. AFR has been defining what it means to make power on Chevy engines for years. We were looking at oval port heads and it seems 270-280 was about the norm for bowl work and 2. These heads are the best performing highest flowing head in their BB Chevy lineup and are ideal for 540ci or larger race engines. The GMPP head (PN 12363400) with 300-cc rectangular intake ports (left) performs very similarly to the oval port head (PN 12363392) with 290-cc intake ports (right), if both have the same compression ratios. 97, 4. I had a 224/230 cam in the truck before with 291 heads and a redone top end. 310ish bore will be the heads that are used on a Northeast Modified engine like Weld Tech's version of Brodix's -1BB Oval RP, page 33 and Weld Tech's Brodix SR20 NE Mod head on page34 of this catalog https://www. I'm sure they are nice heads, though. See more details below. 4 and lower; then the Canfields pull ahead. THE Pegasus "Assassin" are the highest flowing out of the box SBF and BBF cylinder heads available at this time. 88" exhaust valve. t. Nov 23, 2004 · hello chris. 550 lift but that could change to match the head flow rate Top End Engine kits . With an As Cast port version developed by Jon Kaase - (JK 390) for small bore engines (4. 5/124mph -with a "top fuel" timing curve - sold Nov 1, 2020 · I have spent a lot of time on flow benches in the past 30 years testing valve sizes and shapes. 781's with nothing more than a 2. I just don't have any data on AFR heads as my past work did not involve any AFR BBC heads. AND, imho, yes, they will be good power producer heads worked over as long as you get your CR. 88 valves. Flowing over 450 cfm with a 2. 560 bore 13 to 13. I wouldn't think weight is a big issue. As always, these heads come standard with all the fine qualities that only BRODIX has to offer. Heads built for 540ci to 632ci drag race or marine race applications and even though some advertise more flow, on our bench the RFD BRODIX HH MC flowed the best with the best air speed and velocity profile, . These things, as plenty of you know, are sold a lot of places and under a number of different names. 900-inch of valve lift and 316 cfm on the exhaust side. Brodix BBC Spread Port 1203 heads flowed. Jan 25, 2023 · 454 big block bbc heads 781 the heads in stock form flow around 260 @ . Those heads have a nasty edge just outside of the valves that will cost flow and horsepower if left like that. 1-70. I will list some of the components I will be using in the build that will help with your advice. 72 valves? I'm asking because if the 049's are for some reason a better flowing head, I'd rather swap with my extra 781's and use the 049's for an up in coming project that's going to have May 18, 2012 · Watch as we compare popular oval-port big-block Chevy cylinder heads on the flow bench and the dyno. A 290cc port would be too big. 30" Intake Valve and 1. Multiple port programs to choose from. (The right and left intake ports flow almost identical) In addition, MBE has designed the top of the head to accept a single rocker bar that uses 18 fasteners to secure it to the cylinder head. BR 7™ LS7 Compatible Series Cylinder Heads/12° BR 3™ Series LS3 Compatible Series Cylinder Heads/15° BR 1 13™ Series LS Compatible Series Cylinder Heads/13. The problem is that on a 454, it has to have zero deck, and the heads still need 0. Official Release: AFR’s new 457cc 18° Big Block Chevy heads are our best performing highest flowing head in our BB Chevy lineup. Flat-top pistons and -781's on a 454 is only like 7. Tags bbc build chevy engine naturally aspirated. You may also consider a 310cc rect head like the BMF or the AFR 305's, although the rpm range is gonna move up higher than 7000 rpm for max power. Copper valve seats and a 55° seat angle make either head an excellent choice when looking for serious torque and horsepower. 566 on 112 LSA - Hydraulic Roller Flat Top Pistons Comp Cams hydraulic roller vertical link bar lifters This significantly aids tuning and overall power production. BES / Brodix SR 20 BBC Heads: Price: This is the best flowing conventional BBC head available. Jun 21, 2010 · Highest flowing bbc heads. scott foxwell · AFR’s new 457cc 18° Big Block Chevy cylinder heads are our best performing highest-flowing heads in our BB Chevy lineup. 2-148. The exhaust is a different story. The SNIPER BBC Cylinder Head Series is a powerful, out-of-the-box, 24 degree conventional port cylinder head product line. Is it logical to knock a little of the vane down a bit in search of flow at the sacrifice of swirl, or leave it. 600 Bore Chamber Sep 21, 2017 · JMO Look up Stan Weiss' BBC head flow testing data as it will let you look at numbers from a lot of different size and type of BBC heads and make some comparisons Jul 23, 2012 · '67 Chevelle Malibu, Catalina Blue, 540 inch Rat, Air Flow Reasearch 290 CNC Heads heads, Custom Hyd Roller, . Trick Flow also has a few big-block cylinder heads, but we will focus on its premier budget cylinder head, the oval port aluminum version. 14. AFR 265cc BBC Oval Port Cylinder Heads, CNC Chambers, Hydraulic Roller Springs Apr 16, 2012 · Exhaust flow at 1. I flowed the exhaust without an exhaust pipe attached and I only flowed the long port(the better flowing one). I'm sure other have done the same. 1 to 1 on a decked 427-or-781 heads w 117cc chambers yielding 9. The fact that they ( AFR ) makes several sizes of the more racy configuration ( 220, 227, 235, and 245 runners ) I have seen guys spend much more money on cylinder heads that did not run as well as the Jan 14, 2009 · Edelbrock's CNC-ported Victor head offers the largest port volume of all the heads we've tested and also offers the highest flow numbers at 0. These cylinder heads feature advanced port designs and are available in various configurations to suit a wide range of applications, from street performance to heads-up class racing. These heads are 100% CNC ported and utilize features such as raised, oval-shaped intake ports that flow an amazing 489 cfm and up and newly designed exhaust ports that flow 335 cfm with only a 1. The oval port head has 110-cc chambers, and the rectangular port head comes with 118-cc chambers. Taking a 119 cc design head and just milling it to drop chamber size to boost compression usually winds up in a reduction of overall flow. Dec 14, 2009 · First time in a long time I've heard thos heads called "awesome". I did use a tulip exhaust valve on the exhaust. The intake runners and exhaust ports are partially CNC machined, while the combustion chambers are offered with partial or full CNC machining with a bowl blend. 800 exhaust Aug 1, 2012 · The new 245 NPP heads frow about 350 right out of the box, and are cappable of producing right at 900 HP on a very serious full race 434 engine. 88 valves and flow about as good as the Edelbrock BBC head out of the box. IK® Series Cylinder Heads/23° Race-Rite® Small Jan 31, 2006 · What the best BBC oval port heads, as far as port size and flow? Please help trying to make a decision on heads. 11, 2. We have done back to back flow tests with other heads in this market & price range. Nov 25, 2023 · The best flowing BBC head with a 2. 030" milled off of them to make enough compression with a flat top. 19 int and 1. I would no longer ever consider a Chinese casting, even if it were $300 a pair. 400 lift when the 049 head will flow better at higher lifts because of less valve shrouding. I chose the 049 heads because of the exhaust runner, had the bigger runner than the 781. VR255 CNC Highport 20° Cylinder Heads are the baddest Highport head available for your Small Block Ford. we think it's the best and we know you will too. Port GM heads, the lower and mid lift numbers just don't compare to a well ported set of Ovals. These big block Chevy heads are ideal for 540 cu. 4. May 8, 2002 · The Dart heads reach 300 cfm intake flow at 28” of water at 0. Vincent Performance offers Custom CNC Machined Cylinder Heads with our spec Valve Job and Guides. Matching Pistons Available! Nov 28, 2010 · They both flow similar numbers until . Featuring 240cc Intake Runners for 355+ cfm of flow, 67cc Chambers, and 270+ cfm 95cc Exhaust Ports, they are the foundation for a very serious 427ci or bigger Small Block Ford. Dec 3, 2010 · I have seen an BBC closed chamber oval port head done by head porter Ned Erkman from rolling thunderz flow 385-387 cfm, head is got a 2. F460 intake 380cfm @. 900. 07 @ 130 and the heads were #215 casting oval ports. AFR Big Block Chevy With some domed aftermarket pistons, it may AFR’s new 457cc 18° Big Block Chevy heads are our best performing highest flowing head in our BB Chevy lineup. AFR's new 457cc 18° Big Block Chevy heads are our best performing highest flowing head in our BB Chevy lineup. The intake ports are raised . 625today and did not feel like changing it. May 13, 2017 · They'll flow enough to make a good running budget 454, or even 496, up to about 6,000. 400 232 167. they have gotten better. 300x1. These prove to be the highest flowing factory valve angle 460 heads made period. It helps Sniper X 24° CNC Machined BBC Cylinder Heads, 355cc, Valve Jobbed, Each Sold out Sniper X 24° CNC Machined BBC Cylinder Heads, 355cc, Valve Jobbed, Each Sep 27, 2007 · The stock exhaust port location is good for fitment of headers although I feel it may hold back power production compared to some of the other heads with raised exhaust ports. This budget friendly head is perfect for your 509 to 540 Cubic Inch operating below 6500 RPM. Aug 6, 2022 · Which cylinder heads should I run on my big block!?!? This is a question that has been asked by roughly a jillion people because not everyone is building a full-tilt race engine which means that not everyone needs giant rectangular port heads that flow a million cfm. 6. CNC Ported Cylinder Heads; Welding, Repair & Fabrication; Custom CNC Machining; Cylinder Head Development Find Trick Flow® PowerPort® 320 Cylinder Heads for Big Block Chevrolet and get Trick Flow Makes Serious Horsepower! Perfect for all high performance street/strip, racing, and marine applications, Trick Flow PowerPort® 320 cylinder heads for big block Chevy deliver exceptional power potential and competition level durability. Both used the same valve with the same back cut. Dec 27, 2024 · These big block Chevy heads are ideal for 540 cu. 30 intake valve and opened up the chamber to work on a 4. Need the cyl head casting numbers. It is the customers responsibility to verify proper piston to head clearance. The all new, shallow 9 degree valve angle makes this head the leader in its class. 00. Though the LS7 castings share the rectangular ports of the LS3 heads, they up the flow ante with Dec 11, 2024 · (AFR Enforcer may be an exception. 000 in. By having the intake ports raised . Air Flow Detail #174 BBC Sniper 320cc Runner Mar 27, 2012 · 7 Top LS7 Heads. com/products/2019_Catalog. :beers: Cylinder Heads Menu Toggle. 12, 2. 00 bucks, but that was a good 4-5 yrs. 125" Bore and larger engines, the seat angles on the VR255's use a custom 55° 5 angle valve job with 2. 500 in Description: AFR’s new 457cc 18° Big Block Chevy head are our best performing highest flowing head in our BB Chevy lineup. he got 500 for his 5k engine. go and read curtis' posts in the na forum and you can be the judge of what you want to do. pdf AFR’s new 457cc 18° Big Block Chevy cylinder heads are our best performing highest-flowing heads in our BB Chevy lineup. topbulb · Banned. Its runner will feed your beast, street or strip. 5° Small Block Chevrolet Compatible Heads Menu Toggle. Standard port location versions available as well as the super raised runner designs. 650 Assembled 4. Features include rectangular intake runners for strong mid- to Find Trick Flow® PowerOval® 280 Cylinder Heads for Big Block Chevrolet and get Trick Flow Makes Serious Horsepower! Trick Flow PowerOval® 280 cylinder heads for big block Chevy are an ideal upgrade from factory cast iron heads for street/strip and marine applications. Thanks Tee Jul 18, 2012 · It new 300cc Magnum heads did not offer the highest peak flow numbers, topping out at 383 cfm (at . he Mar 13, 2011 · I think the issue is that for some heads, the flow path is markedly different with and without a pipe. I had the bowls under the valve opened up as far as they could go. AFR's 325cc BBC Enforcer Cylinder heads feature our Permanent Mold "As-Cast" Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. They can't cost that much more to make. L-29 heads on a 4500-5000 rpm tow rig, small dish flat top formerly peanut head '88 454, mild cam. Nov 1, 2022 · I review and flow a Promaxx Project x 200cc head. Now you can strap on a pair of their best performing, highest flowing heads, their 457cc Magnum BBC 18 degree cylinder heads. 750-inch lift and your cam only has . i would like to get my heads flow tested but there is only one place that doesnt here and hes 2 months BBC PRO1 20° 451cc CNC Cylinder Head - 1. All of those features combine for some serious airflow, with peak intake flow numbers of 432 cfm at . The designers appear to have been obsessed with diagonal joint surfaces, using them on both inlet and exhaust manifolds. So in April this year I ordered from Skip White his BBC aluminum heads. 500 with the valves rolled to 18 degree resulting in unparelled under the curve flow numbers. with the valves rolled to 18 degree, resulting in unparalleled under-the-curve flow numbers. We check, blueprint and Mar 4, 2012 · I am open to advice and guidance, but I really want most of the info/guidance I recieve to be on cylinder head choice mainly. 30 valve for a 4. Nov 24, 2022 · The "best flowing BBC heads with a 2. IK® Series Cylinder Heads/23° Race-Rite® Small Feb 25, 2012 · Well, I did some research but first let me tell you about my combo: 1979 Nova Motor was complete when purchased, appeared to be balanced, previous owner of the motor said it was a 454 . Cylinder Heads - Air Flow Research Cylinder Heads Top End Engine kits . 1 to 1 on a decked 427 Cam is HFT 230@50 and . Jan 10, 2018 · The block has been relieved to 4. buy bare castings and put manley or ferrea valves in with compcams or better springs, locks, etc. 88 Exhaust Valves installed. Port flow out of complete heads from Barnett with 2. 90's with no other changes, I bought the heads used for 200 bucks, the open chambered heads was just the run of the mill oval ports from 70 or 71 can't remember the casting number. 9 to 1 CR. The Thor heads are the way to go, if Nitrous is your thing, they seem to like it real well. ill message chris about the cam, thanks Pro Filer Sniper Big Block Chevy Heads with 320cc Intake Runner, 2. 781's are oval port bbc oc w/ approximately a 265cc runner and came stock w/2. They come standard with stainless steel 2. Available in 3 intake port options (290cc, 320cc 370cc) the Pro-File Why Choose Us? More than an engine shop and parts. The exhaust was very impressive creating an E/I ratio of 72%. IMO they should support a pretty stout street car. If you buy heads that flow a gazillion cfm at . Multi-angle seat design for improved flow at low lifts; Advanced port design for improved flow at all lifts; Advanced combustion chamber design allows superb flame travel and burn; Additional pushrod clearance machined along outside port walls; Threaded accessory holes in ends of heads; Thick deck to resist warping and allow for additional Jun 22, 2007 · Oval Port Aluminum 280cc BBC Cylinder head. Somebody recently posted it is why I mention it. Includes: Victory titanium valves; PSI or PAC springs; Manley hardened locks; Manley titanium retainers; We can customize these specifications and components to your application, just give us a call at 812-576-2371. Oct 7, 2024 · Find CHEVROLET AFR 457cc Magnum BBC 18 Degree Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! AFR 457cc Magnum BBC 18 degree cylinder heads were built specifically for high horsepower race applications. Looking at 353049's and 336781's. 88 valves and 11/32 guides. Please HelpTrying to make a decision on heads. Under the valve covers on top of one of the intake runners right next to the rocker stud. claprha plnbaocf fphxk itwdkk xooe qwgxhi rvoy rceo vrzml sxqgq