Power advantage between Ford 351, Mopar 340 and Chevy 350??

Mean416 said

In stock form, obviously you can look up the numbers from tests back in the day. None of us really give a **** about stock form numbers.

If you were to build an all out (factory iron block and heads) engine TODAY, the Cleveland 4V would destroy the Chevy and Mopar. The heads flowed enough with zero port work, to support 500+ HP with no port work. The very best "J headed" LA wouldn't come close.

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Actually a Cleveland 4V has a horrible massive combustion chamber and big lazy ports. I've built a few and at pump gas compression ratios and with civil, driveable camshafts they don't even make 1hp/ci--like 340ish hp with lackluster torque 370ish. An absolutely comparably built 340 usually winds up at 380-390hp ish/390-400 tq ish--lol and with fewer cubes. You're not wrong--the flow of the Cleveland can support very high levels of power just like the vaunted HEMI--but inactual reality the big stupid ports and not enough cubes makes them sluggish and unresponsive on the street. I would love to see a shootout where OEM cast iron heads are used (porting allowed--make them Clevelands bigger-lol) and the cams are spec'd the same and compression is set at 10-1. Base the score on average HP/Tq ALA Enginemaster comp. $100 bucks the Cleveland doesn't even podium. J.Rob