I have a 02 gmc with a 6.0 all stock engine. I'm wondering what i could gain changing over to say LS6 heads to raise the compression. Anyone done this? Is it worth it?

 

You'll gain about a full point in compression. What do you have a LQ4 or LQ9?
A LQ4 would be about 10.5:1 and LQ9 would be 11:1.

Unless you have access to tune the timing correctly you will have to run premium on a LQ9 and even then you may run into detonation problems.

My old setup was done all at once so I can't say how much it helped, plus I had ported heads too.

 

I have a LQ9 6.0.

 

i ran 243s on a Lq9 and it was at 11.1cr on a Lq4 its 10.5

 

Thanks for the info!

 

Dave,
I have an 02 GMC and I'm thinking of dropping an LQ9 in it.
What mods did you have to make?
Thanks,
Jerry

 

was this stock 243's??

 

yes unmilled 243s on a LQ9 makes it iron block LS2. difference is 10.9 to 11.1 difference between the iron block and aluminum block. same internals

 

that a good way of putting it so I can understand.