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New line of ProMaxx SBC Heads? - Project X

8.6K views 4 replies 4 participants last post by  BogiesAnnex1  
#1 ·
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 ($1346/pair HR Assembled)... if you haven't noticed, Profiler's prices have skyrocketed on Summit's site, and on Profiler's site it says "$Call" for pricing...

Expected delivery times are 2 months out... which is still probably quicker than you'll get from Profiler.

Anyway, just a heads-up for anyone trying to get something comparable to the Profiler 210 in the $1400 price range.

Project X SBC 215 (Sold in Pairs) - PROMAXX Performance Products
 
#3 ·
Exhaust flow is weird high, nearly 90% of intake at .5 inch where .7 to .75% is more the typical.

Intake looks like the short side turn with the pushrod pinch and head bolt disturbance at the pocket entry is quelled. The 8mm valve stem is a big helper as well not to mention the 5 angle valve job.

If these are repeatable numbers that are typical it looks they’re on to something.

Bogie