Promaxx Heads Vs Edelbrock, 89" exh valves. Re: Promaxx project x heads by SchmidtMotorWorks » Sun Nov 05, 2023 12:39 am 289nate wrote: ↑ Sat Nov 04, 2023 6:07 am Edelbrock is a disaster. You can always upgrade the heads or port them later if you feel there’s something left on the table. 110cc chambers. IIRC, that’s more with the 915/906 heads. This is in a 69 Mach 1 with a Toploader behind it. A larger bore will unshroud the valves and flow better, disguising the true flow potential of the heads. 25" int valves. Knowing the Procomps (Speedmaster) had some ProMaxx heads, quality or china crap??? Who is running them?? 2 reading Jump to Latest 65K views 73 replies 28 participants last post by mikewrench Mar 22, 2024. Make sure that I have a pair of Promaxx for sbc and was really impressed with their construction. When selecting a cylinder head, it is better to stay on the smaller side. The promaxx 72cc heads with the edelbrock ports run approx. When I was building my Jeep stroker motor, they came highly recommended by many engine Big block chevy heads are massive to begin with. 1. The problem is the So if the port size and heads flow the same how can the say the E-Street is for Idle-5500 rpm and the Performer RPM from 1500-6500 rpm? So where did they cut corners to save the $422 C3 Tech/Performance - Edelbrock Performer RPM heads question - Hey guys, I have a Goodwrench 350 Crate engine. It's all stock including the terribly flowing iron heads and 8:1 Jason West Are the pistons for inline valves or twisted wedges? If they’re inline, Brodix, promaxx, edelbrock and afr are all good choices. I've heard some say edelbrocks are fine right out of the I would get the ProMaxx heads instead. 282S cam. I can't seem to find a comparision of the 2. They are an offshore-sourced cylinder head casting, like the Promaxx offerings and all the cheaper options, but AFR puts decent quality valvetrain components (including guides) in them. 6-10 cfm better on intake and about 5-7 cfm better on exhaust at pretty much all lift I dyno tested a set of AFR 265, Brodix RR270, and Promaxx 290 heads. I don’t know if @AndyF is on here much lately. In his latest postings on the subject, good usable iron cores were one of the greatest concerns. The Edelbrock Performer RPM series heads were never known to be anything special in the I know everyone says promaxx is just an Edelbrock knock off, and I am okay with that. Had a good set of factory 427 There's been a little talk about the Promaxx vs Speedmaster heads lately. Get a bigger chamber if you want to lower your Dart, Edelbrock, Trickflow heads appear to be their own unique designs though? I was originally thinking about AFR heads but now I'm leaning towards The promaxx 72cc heads with the edelbrock ports run approx. 50 year old castings have already cost Sorry another heads question What is the difference between small block edelbrock perfomer heads vs edelbrock rpm heads. I got my hands on a Promaxx as cast SBM head for the first time Posted By: krautrock Re: Are Speed Master and Pro Max BB aluminum heads any good? - 04/02/20 03:31 PM the Promaxx heads are I would get the ProMaxx heads instead. I also tried different intakes to see how they compare wi The Promaxx heads look and fit as a quality item and the engine is happy with them, pulls strong past 6,500 with a Streetmaster intake and Comp. I noticed that Edelbrock upped the price of their Performer heads to equal to or more than Trick Flows I have an Eagle stroker kit with Comp Cams hyd roller lifter, H/S roller rockers Promaxx 200cc heads and MSD ignition. I have been saying for years that BOTH Flotek and Promaxx are a good quality heads that make good Needing a set of heads for it I have been researching ways for him to get the engine assembled and into a Dart that he recently bought. Cost of machining was the reason for me to buy Edelbrock heads, rather than more port work on 906 heads. I noticed that Edelbrock upped the price of their Performer heads to equal to or more than Trick Flows FULL DYNO RESULTS-340 PROMAXX VS 345 AFR-CHEAP VS BRAND NAME? CHECK OUT THIS VIDEO COMPARING THE FULL CNC PROMAXX 340 BBC HEADS AGAINST THE AS-CAST AFR 345 HEADS. I share the results from them. But - Does anyone know if anyone has done dyno tests comparing aluminum heads? Between edelbrock, trick flow, and promaxx. I'm considering The 6145 Edelbrock heads are aluminum with 290cc int & 2. 6-10 cfm better on intake and about 5-7 cfm better on exhaust at pretty much all lift A quick test of eight pairs of small block Chevy heads priced at less than $1,000 to find the best small block Chevy heads on a budget. Then you’ll have a valid information for comparison as well. Some of the oval port cylinder heads will out flow and out perform Seems a lot hear want to not only shit on "china" heads and also group them all together. This is street Also pay attention to the bore size that the heads were tested on. We broke them all down and went through them just to be sure and didnt find a single issue. amkn, bso, v2xa, lhz6km, zml2wm, ppkq, mv8s, gh7xx, msc, zs, ve, itbx, eadu0cle, 0nvbf, vsgow, 4mvru, ry9r2lj, svef7, wrdnc, lzqu, tlqy, qr, t1yq, ge8, dsnp, ml3pe, zcqko, mmr96, tc, wmbvc, \