What are the differences between an LS1, LS6, LT1, LT4, and TPI. I'm pretty sure that they are all 5.7L, but I can't figure out what makes them different from each other, other than intake manifolds. What kind of performance differences does each one have?

I know its kind of a big question, but everyone I've asked has never given me a straight answer.

Thanks for any help in clearing up the differences.

 

block design, head design, intake manifold. pretty much everything. the lt1's i think are actually a 349ci (don't quote me in that) and the ls1's are a 346ci. there are a lot of differences

 

TPI motor is your basic small block fitted with fuel injection. This was used in the 80s.

Then in 92 the LT1 was released. Its basially a TPI motor with a better intake manifold and igntion system. The LT4 is just a LT1 with better heads, cam and a 4 bolt block.

The LS1 is a totally different design. It shares nothing with the older generation small blocks. It has good flowing heads, even better igntion, and a broader powerband. It also has an aluminum block. The LS6 is what the LT4 was to the LT1. It is essentially a LS1 with better heads and cam.

 

The LS1 is also a six-bolt main.

The F-body LT1 was a 2-bolt main, the Corvette LT1 and the LT4 were 4-bolts.