LS9 heads on to LS2 block?

[MyM8V8]

Just researching this as they appear good value. Only problem is that LS9's have 12mm head studs and the LS2 are 11mm.

Anyone have a view on whether this is possible?

[MyM8V8]

minime68 said:

LSA and LS9 are the same aluminum casting. The valves are different but if you are upgrading then there isn't much to look at. You can probably find a used set of LSA heads for $6-800 and then have them ported.

No these heads I am looking at have the titanium valves and beehive springs fitted. They are only $890 a piece at the moment, so for a CNC ported head are cheap without the valves.

I also just found out that they will be OK with 11mm bolts.

ETA. Wonder if those beehive valve springs would be rated any good for FI?

Edited by MyM8V8 on Tuesday 28th April 12:32

[MyM8V8]

http://www.jegs.com/i/Chevrolet+Performance/809/19...

These are the ones which Gurmeet pointed me in the direction of. Only issue for me is the limited lift of .570 with the fitted beehive springs.

Titanium valves and CNC for $890 a piece. What's the catch???

[MyM8V8]

wormus said:

They do look good very good. Perhaps they were ported by LS8VPower ?

Anyway, I can vouch for these and they're not massively expensive: http://www.lingenfelter.com/mm5/merchant.mvc?Scree...

Only other thing to note is those heads use sodium filled exhaust valves instead of inconel which deal with the heat better. Wonder how it can be alright to use 11mm studs in a 12mm hole, do you just do them up "really tight" and hope they don't move?

They can't move because the heads are dowel located to the block. The bolts apply a vertical clamping force.