Ls1 or ls6?
#1
Ls1 or ls6?
Hello. I got a used 2001 z28 and there is some confusion about the engine. The person i got it from showed me text from a previous owner saying engine was swapped with an ls6 engine. I dont believe it is an ls6 but how can i tell for sure? I want to get a retune but im not sure what to put down, ls1 or ls6. Or would it even matter to the person tuning the computer?
#2
TECH Resident
It doesn't matter to the person tuning... 01+ came with a LS6 intake manifold so that may be where the confusion came from. But start by posting the cylinder head casting numbers as that is going to be the easy way to tell.
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Either way, it's just the block, everything else is the same. Although some people swear that the ones they've had that had them ran better than the others. One guy even said that he's had 4 all together and if you gave him two cars, one that had that block and the other just an ls1 that he could tell you what one had the ls6 block. I find that hard to believe, but I've not driven one.