Building a 383 help

rumblefish360 said

@273 said above;
"Bottom end stroke rod ratio and displacement decides where the power band is."

Incorrect, cam duration and the ability to control the valves, AKA, valve springs and a few other factors do.

I do think you were meaning to say/imply that a shorter stroke likes to rev higher than a longer stroke engine which tends to make its power quicker in the rpm scale?

Like a 340 vs 360 or 383 vs 440 deal?

Click to expand...

I mean if we build this 383 with a certain top end say with trick flow 240 and a 245 @ 0.050" ish cam and all that go with it.
That's gonna a make the power of this engine. Then choosing stock 3.38 or one of the stroker cranks 3.75/4.15/4.25 will decide where that power band will be for the most part.

For a mainly street car with average gearing 3.55-3.91 probably want peak power around 5400-5800 rpm.

As for what makes an engine a revver I think has more to do with air flow then stroke but using a long stroke is gonna run out of rpm sooner than a short stroke cause of piston speed.