Big horsepower 318 builds

For the engine builders out there. For the sake of discussion lets say I wanted to take on building a 500HP 318. Using my ported Edelbrock heads, 55cc chambers, they flowed 293 @ .600" with a 2.02" intake but now have 2.055" intakes. Nothing special but they will easily support 500 hp.

Building it like I would any other engine, a good rod, probably custom pistons with low tension metric rings, necessary oiling mods and good bearings and roller rockers. Either my Victor or the Weiand X-Cellerator with a 950HP.

Flat solid or solid roller? Duration and lift? How much compression? Where would the peak torque and HP be (rpm's)? Lets say this is a street/strip deal that will run on pump 93 at least and at most a mix of 110 UL and 93.

Dwayne please weigh in. Also guys that have engine programs, build it and post what you found. I know their accuracy is questionable but this is just for fun discussion.


At 293 CFM, and the Victor correctly ported you can be easily 11.5:1 compression and to keep in at 7k or under, depending on displacement you’ll need to be between 250-260 at .050 with a MM lobe or close to it and an LSA of 106-108 depending on displacement.

That can easily go over 500. Easy.