LuGGNuTTls1

which stock ls heads are best for turbo set up

TINKRD

iTrader: (27)

ls3 best bang for the buck.


throw enough boost down any head and it'll go.

Blackpanther99

iTrader: (8)

Agreed^

317s aint bad at all either for the price, ppl making big power.

Blackpanther99

iTrader: (8)

Question is what motor we talking about??

rotary1307cc

iTrader: (5)

LSA/ls9 are the nicest stock castings out there hands down

DEFYANT

Depends on the bore. Anything under 4.065 use LSA/LS9 Heads. For a 3.905 and below, 243s are good. For 3.800 and below 799s.

vern6.0

With the lsa/ls9 heads. Are the decks thick enough to handle 20+psi?

TINKRD

iTrader: (27)

A stock 317 can handle 23lbs. The key to keeping heads down is in the tune. Just from my experience

DEFYANT

Yes, the LSA/LS9 can. It is all in the tune though.

redtan

iTrader: (5)

Why are 799s better than 243s on a 3.8" bore?

JustAFooL

iTrader: (45)

Also wondering this?.

NemeSS

iTrader: (127)

Me three^^^
Waiting to hear the reasoning for this.

LuGGNuTTls1

thanks for the input guys looks like i need to find ls3 head

Photochop

iTrader: (74)

243s and 799s are the same cylinder head, some 4.8/5.3s even had mixed casting numbers on the same motor. Only 243s that came on an ls6 engine from the factory had the sodium filled valves, the rest have standard valves.

317s are essentially a 243/799 casting with larger combustion chambers on the 6.0 LQ4/LQ9 engine.

If you're boosting just go with any of these 3, best bang for the cheapest buck.