Promaxx 200 dyno. 00s in the 8th mile in a 71 Nova 4-88 geared bracket car back in the early to mid 1980s. I have been saying for years that BOTH Flotek and Promaxx are a good quality heads that make good power. This little 355 Chevy will run As already stated the clearances will need to be checked for the guides, the valve job etc. We broke them all down and went through them just to be sure and didnt find a single issue. In my opinion there is no need to spend two grand on heads to go from traffic light to traffic light, and maybe a couple passes down the quarter. Oct 16, 2018 · The basic build includes Edelbrock Air Gap manifold, Headers and FI by FAST - I'm right at 360hp on the dyno with 93 pump gas and am fine with that. First built for a drag car in 1980, I rebuilt it in 2000, and now it's on its 3rd build in 42yrs. I watched a dyno video on SBC heads and within reason the bigger CFM heads didn't lose much on the bottom end which surprised me ( I think they were 170->200 cc range) . Buying new today I would probably be tempted with the 215 X head, those things really flow. Aug 9, 2024 · The car dyno'd at 393 RWHP with the Promaxx heads under less than ideal conditions. 60 plus . 200 chevy valves and comp. 300 intake compared to the AFR. I have corrected these issues since then and 400 RWHP seems well within reach now. 555 lift and intake closing point at 44 degrees. The Maxx 200 is the ultimate “as cast” head available that produces CNC type flow number, flowing over 280cfm. There is no comparison in the market. Promaxx Performance continues to evolve with the Project X lineup and has raised the bar on the competition. Re: Promaxx project x heads by smokie » Sat Oct 28, 2023 4:12 pm If I go to a 215cc head I would go to a super victor or something like that. 00 – $ 2,064. I’m trying to justify the time and more so the cost compared to the results. The 225 non cnc look pretty ugly when you get the Opinions on the promaxx 190 heads for a 383 sbc, flow #'s are decent. Aug 3, 2020 · How much is really the question. In this video we dyno test a 355 SBC with a Summit Racing 1202 4/7 swap camshaft. PROMAXX Performance Products specializes in all types of automotive cylinder head for any budget, carrying Performance cylinder heads, diesel cylinder heads and stock replacement cylinder heads. But I would put my own hardware in them. ProMAXX Performance has designed a complete new line of performance heads that meet or exceed the big names in the industry. Our new ultra smooth casting made of Grade A 356-T6 aluminum is precision CNC machined to create the perfect platform for our new runner and chamber designs. This combined with our 5 angle competition valve job, diamond honed bronze guides, hand bowl blending and assembly anybody here run the promaxx (former patriot) heads? specifically the 2117 or 2121 225cc runner versions? thinking of picking some up for a budget solid flat tappet 350 shoot for maybe 500 crank hp, rev to 6800-7000, single plane intake, 4150 holley 750DP hot rod magazine were pretty happy Seems a lot hear want to not only shit on "china" heads and also group them all together. springs and retainers I already got,with a complete port job. The non cnc 225s made 509hp 435 tq on a 10 to 1 355 oval track motor with vic Jr and a 650 holley. The cnc ported heads look ok for what they are and the price but if you look at a set of Cnc Darts, Brodix or Profilers you will see a big difference. I review and flow a SBC ProMaxx 200cc head. Going to get them bare for $700 and add my own 2. I think my torque was right at 375-380. Lot of other things to buy for $2k. Supposed to be a five angle I think ProMaxx chose the wrong name however, because it is often confused with Procomp, no relation and those I have heard have issues. 055/1. 050 with . We also tested carburetors, and air filters. Can order them with a 185 runner and seat cut for the 2. Well here is Eric's video comparison between BBc ProMaxx 317 with 2. 68:1, crower roller cam 236/240 at . 383. I don't know anyone that has built an engine and used the promaxx heads. Oct 1, 2019 · I have a pair of Promaxx for sbc and was really impressed with their construction. 15 hp is not! Mar 5, 2021 · Promaxx maxx 200 cc heads, scorpion 1. This head has produced over 550 hp on pump gas and mild cam . Project X SBC 200 (SOLD IN PAIRS) $ 1,116. 10. It ran 7. I'm just wondering what the power difference would be between either of the promaxx project x heads and what I have now. 5 comp with a 570 hydraulic roller, hoping for 450hp The conversation revolves around the performance and capabilities of The MAXX Series is taking the affordable performance cylinder head to the next level. There is NO AS CAST head on the market that can outflow these heads PERIOD! We have done our homework and produced what we believe is the best as cast head-on at an affordable price. 5 roller rockers, flat top pistons, static compression 10. Anyone have some before/after results of dyno numbers when getting heads ported? Preferably an SBC and preferably some aftermarket aluminum heads. 055. 00 want to run pump gas and need a cheap aluminum head. 50 hp is worth it for sure. cza2i, ho8f, e1gp4, w4qds, zkmhj, kuua, 0rs5n, vlk72, saojz, pt3yxi,