Thank you for your response.
It has been brought up before that intake runner length and cam selection would have a more noticeable effect on torque production. And I am sure that they do.
But increasing mechanical leverage has to produce a noticeable difference. It has to. All other things being equal, if you had a LS2, a L99, and my proposed undersquare six liter... The intake and cam difference between the L99 and LS2 should demonstrate what everyone has brought up.
I am hoping that I can achieve that same difference with just the mechanics of how my proposed engine is assembled. Whatever makes the truck engine a L99 and not just another LS2, the change in the powerband that makes the L99 haul hay, while the LS2 hauls ass, that extra something down low that makes the L99 a truck motor... I'm hoping that I can achieve this same extra something down low through nothing but additional mechanical leverage.
For the sake of this discussion, we will say that I will put a LS2 cam, LS2 intake, LS2 throttle body, LS2 injectors, and a standard LS2 tune on my proposed undersquare six liter motor. It is essentially an undersquare LS2. At this point, the ONLY things different are the bore to stroke ratio, and head flow. Since I have been talking about using TEA's stage two ported heads, they outflow stock LS2 heads. So, please assume that the LS2 heads have been touched up to flow
[email protected] as well.
Anyways, I build an undersquare LS2, right. All things being equal (tune, cam, intake, injectors, etc), what changes do you think the 4" crank would, or should, bring?
If the heads flow the same, using the same injectors and intake, same tune, same cam, same exhaust. All things being equal, except for the only difference being a 359ci undersquare longblock versus a stock 364ci LS2 longblock, do you think that there would be a noticeable difference between the two?
If it does give me something extra down low, awesome. I think it should.
If it doesn't, oh well, I have a forged six liter V8 that's a proven platform for boost... I think I will be ok.
But I do think that I can achieve this truck motor something extra down low, without sacrificing anything at all up top. If I choose parts that can withstand the abuse, and I am willing to spin the 4" crank as fast as GM spins the LS2, and my heads flow equal to or greater than the LS2, then I will be able to push the same cam/ intake/ injectors/ blah blah blah just as high as the LS2... But I will have the added mechanical leverage of the 4" stroke, if that proves to be beneficial or even measurable.
Thoughts?