LS2 question

[B/STOCK]

Can you swap a LS2 for a LS1? I don't care about the computer changes etc. All I want to know if it will physically bolt right up. Thanks

 

[c4c5specialist]

HI there,
If I was a betting man, I would say maybe. Due to the physical changes to the block, it may NOT. However, I do NOT know for sure.
I will be in BG soon, and will be taking physical measurements and specifications.
Allthebest, c4c5

 

[c4c5specialist]

Hi there,
After 3 days with c6, I can expand on this post.
Wiring harnesses and control computer will have to be changed.
Integration of the system to present c5 is almost impossible, due to the communications system of c6 vs c5.
I would think that a better alternative is to wait for GMPERFORMANCE PARTS to engineer a stand alone crate engine with PCM, like they did for the Gen 3 small block.
Allthebest, c4c5

 

[Hib Halverson]

The LS2 is the same physical size as the LS1, so from that standpoint, the engine swap should be a bolt-in.

The biggest problems will be wiring harness...some Gen 4 engine accessories (the KSes for example) are in different places and may require additional wiring.

The next problem will be how to adapt the Gen 4 engine controls to a car wired for the Gen 3 controls. The LS2 engine controller is different along with, as c4c5 says, platform communications. Also, in the case of an automatic, there will be additional complexity, because the LS2 controller is engine only and the LS1 controller ran both the engine and the trans.

I suspect, it would be easier to adapt the Gen 3 engine controls to the Gen 4 engine.