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Any concerns the sump is made of plastic? Heat cycles?
It’s Now A Dry County
The new LT2 is also equipped with a dry sump as were earlier-version Corvette engines, but with several interesting twists. Most importantly, the dry sump system allows the engine to sit a full inch lower in the car. That inch has a dramatic effect on the car’s center of gravity. The older dry sumps used only the existing oil pump to pull oil out of the engine, while the LT2 adds two additional scavenge pumps in the crankcase and in the lifter valley.
This essentially becomes race-engine-like and contributes to a measurable reduction in windage inside the engine. Just like an aftermarket multi-stage dry-sump pump system, the factory LT2 system results in power gains. First, by reducing the amount of oil hitting the crankshaft. Second, the two added scavenge stages contribute to reducing internal crankcase pressure and increasing vacuum.
Interesting article. Does the Z51 package get the 4 into 1 tubular headers and the base model only gets the 4-2-1 iron manifolds?
Yeah this is interesting. It makes it sound like the manifolds are the exhaust package that's standard with Z51 and optional with base cars, instead of an NPP style cat back like on previous generation cars that was responsible for the 5 hp bump. This is the first time that I've seen that.
Engine Labs LT2 article
