Quote:
Originally Posted by m6-lt1
I understand how it works but I’ll counter with something. If you look at Dyno graphs of the LS7 versus the LT1, that engine literally pulls hard EVERYWHERE. So it is possible but that was an expensive engine in an expensive car at the time. I do wish there was an LT engine that pulled just a little harder up top. I’m cool with sacrificing a bit down low. You don’t race from 2k-4K, you race all the way to redline.
I agree that building a pushrod motor past like 7k, it is likely to not last versus DOHC setups.
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LS7 was still a mostly square setup. 4.1 bore 4.0 stroke. It was just built with good parts. The newer engines are oversquare. 4.1 bore 3.15 stroke. It ends up being a lower torque but higher rpm setup. Adding the turbo for the ZR1 just kinda makes the mid to high rpm power a whole lot.
Its interesting to see them going to the oversquare setup, most GM v8 builds have kept to square builds or undersquare like the 383 or any stroker motor, to favor low end torque.