I may be getting a chance to build a 572 C.I. KB aluminum block wedge N/A pump gas motor for a local customer, I have one set of B1 heads and another set of ported 440-1 heads.
I've made 775 HP on pump gas testing my old 517 C.I. pump gas Duster motor with a cast single Indy 400-3 intake with a Holley #9375 non HP Dominator carb. with another set of CNC ported 440-1 heads, the same short block , intake and carb with a set of Indy SR M.W heads made 727 HP on the same dyno two weeks later work
My math says that is right at 1.5 HP per C.I. with the 440-1 heads but I'm thinking the larger C.I. motor may not be able to make the same power ratio due to the heads might limit the air flow on the larger C.I. motor, what say you guys?
Those 440-1 heads flowed 370 CFM at .700 lift on Pettis Performance Super Flow 600 flow bench 15 years ago, the SR flowed right at 340 CFM heads shruggy
572 C.I. x1.5 HP per C.I.= 858HP shruggy work
I built and dyno tested a 572 C.I. Gen 2 pump gas dual 1150 dry CFM throttle body EFI injected street Hemi motor several years back, it didn't make the same amount of power per C.I. as the wedge motors due whiney It made 799.4 HP at 6500 RPM, or 1.40 HP per C.I. whiney whistling
I'm hoping that customer doesn't hurt himself with that motor the first time he drives his new to him car luck

Last edited by Cab_Burge; 09/15/20 07:44 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)