Search results
Results From The WOW.Com Content Network
E. ericnova72. 22759 posts · Joined 2007. #12 · Oct 16, 2018. ProMaxx makes a good head, it's been discussed a few times over on the SpeedTalk forum, which is more of an engine builder, head porting specialist, machinist frequented board....a few of the custom head porters have remarked that it is a quality piece.
My ProMaxx Maxx 200cc sbc heads arrived. They showed up assembled with their parts. I had sent them my parts to assemble them. Someone messed up. They sent my parts back to me so I am goin to assemble them myself but I did get them for $815 with their valves. Valves are REV valves. Had XVT stamped on them.
ProMaxx is a good value for the money. ProFiler as-cast airflow rates rival the CNC street ported version of the AFR head, putting those two at the top of a flow test comparison list. ProMaxx's full CNC port head is quite good as well. Beyond that information, it just starts to become a personal chice, along with all the other build parameters ...
Promaxx X series sbc heads. Saw a video review on YouTube about a promaxx head. So I started looking into them. I see the have a. X series with 185 intake runners. The flow numbers seem better than vortecs. Anyone running them or any promaxx sbc head that they could give some input on. Wondering if they would be better than my cast iron vortecs ...
Howards Cams Hydraulic Flat Tappet Camshaft and Lifter Kits CL110051-12 - Free Shipping on Orders Over $99 at Summit Racing. but I'm afraid to loose low end torqe. Alternative is : Howards Cams Hydraulic Flat Tappet Camshafts 110991-08 - Free Shipping on Orders Over $99 at Summit Racing and change timing 2-4 degrees.
10098 posts · Joined 2005. #2 · Oct 14, 2013. Pretty typical of a vortec head with a good valve job. Reply Like. jokerZ71. 5060 posts · Joined 2013. #3 · Oct 14, 2013. Yep. They do seem to continue to gain a slight amount after .525 where a stock L31 will start to drop off,but,still just 6 to 7 cfm more flow @ .600.Lower lifts are also only ...
I just built a 355 with ProMaxx Maxx 183 heads. Engine runs great and not looking for new heads, but I was looking at the AFR 195 Enforcer heads. I had never seen them before. I got to looking at the advertised flow numbers for the AFR's. Maxx183's flow a little better at lower lifts, but they are pretty equal at .500.
I just stumbled across the ProMaxx "Project X" SBC heads on Summit's site. Went to the ProMaxx site and checked them out, and they seem to be comparable to the Profiler All-American 210 heads. 2.08/1.6 valves. Flow numbers seem to be almost exactly the same as Profiler on intake, higher on exhaust. Price is about the same as Profiler used to be ...
Longer than block huggets, but shorter than full length headers. -2 x 2,5» exhaust with crosspipe and straight thru mufflers. -Holley/QFT 650 cfm carb with mechanical secondaries. -6-speed manual transmission T-56 with 0,5 overdrive on 6th gear. -4,09-1 rear axle ratio.
Unless you are using a VERY mild cam, you will be able to use 64-65cc heads with flat tops on a 383 SBC (10.3:1). For street, check dynamic compression ratio is 8.0 - 8.5:1 (or a little bit higher) with whatever cam you use. Use 195cc heads for up to 6250 rpm. 210c heads for 6250+ rpm.