[Joshinator99]

Originally Posted by 2SSAustin

My curiosity spiked me when reading about the LS1 Vs LT1 Engine discussion. Not just about that but what are the improvements from the late 90s LT1 vs Current LT1? Other than the displacement size & power?

I tried to search it online but I cant seem to string the words correctly to find anything. Not sure how to word it so Google will bring me what I want to see.



Thanks in advance!

Late 90’s LT1 was iron block, reverse flow cooling, and regular port injection. Spark was handled by the “Opti-spark” which was driven off the front of the motor (and right behind the water pump...lol) and fed all 8 cylinders. Very short runner intake manifold made of aluminum gave much better HP numbers than the L98 engine it replaced (but less mid-range torque). Throttle body was dual 48mm blades if memory serves.

So, the bore spacing is probably the only thing that is the same.