is ls2 heads on an ls1 a direct swap? if not, what has to be done? Will there be much of a gain over the ls1 heads?

 

should be a direct bolt on...

they are basically ls6 heads with slightly different valves i think.

should flow a little better than stock ls1 heads...but it will depend on the rest of the engine as to "how much" they gain you.

stock cam...maybe 10hp...bigger cam 15-20hp.

 

According to the GMPP catalog:

LS1, LS6 and LS2 heads will fit an LS1 and LS6 block

LS1, LS6, LS2, L92 and LS3 heads will fit an LS2, L92 and LS3 block.

LS1 / LS6 blocks are 3.89" bore

LS2 blocks are 4.00" bore

L92 / LS3 blocks are 4.065" bore

found this on a corvette forum

 

im going to be running a cam with around .591 lift So between that and that heads what kind of gain should i see over a stock ls1? like 25-30?

 

any estimates?

 

a generic lift number is not enough for an estimate

 

220/224 .570/.580 on 114 lsa