Quote:
Originally Posted by SS71SS24
Could the L-87 6.2L have a mechanical limitation as compared to the LT-1 6.2L?
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Nope. Now I will let you know the L87 has more collapsible lifters but that’s not why it revs lower. The L86 had the same amount of collapsible lifters as the LT1 but that also only revved to 6k like the L87.
The reason the 86/87 rev lower than the LT1 is simply because the intake manifold is designed to make more torque at a lower RPM than the LT1. It simply does not have to rev to make power which is what you want for a truck engine.
The main (and possibly only) differences between the L86/87 engines versus the LT1 are the oil pan, oil pump (I think), accessory routing, intake and exhaust manifolds. As mentioned before the L87 has more collapsible lifters than the L86/LT1. They are pretty much identical internally (heads, cam, bottom end).