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heads which are the best ?

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Old Aug 8, 2014 | 04:38 PM
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Default heads which are the best ?
which stock ls heads are best for turbo set up
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Old Aug 8, 2014 | 05:37 PM
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ls3 best bang for the buck.


throw enough boost down any head and it'll go.
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Old Aug 8, 2014 | 10:09 PM
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Agreed^

317s aint bad at all either for the price, ppl making big power.
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Old Aug 8, 2014 | 10:11 PM
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Originally Posted by LuGGNuTTls1
which stock ls heads are best for turbo set up
Question is what motor we talking about??
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Old Aug 8, 2014 | 10:56 PM
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LSA/ls9 are the nicest stock castings out there hands down
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Old Aug 8, 2014 | 11:13 PM
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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.
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Old Aug 9, 2014 | 07:08 AM
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With the lsa/ls9 heads. Are the decks thick enough to handle 20+psi?
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Old Aug 9, 2014 | 11:26 AM
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A stock 317 can handle 23lbs. The key to keeping heads down is in the tune. Just from my experience
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Old Aug 9, 2014 | 02:35 PM
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Yes, the LSA/LS9 can. It is all in the tune though.
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Old Aug 9, 2014 | 09:17 PM
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For a 3.905 and below, 243s are good. For 3.800 and below 799s.
Why are 799s better than 243s on a 3.8" bore?
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Old Aug 10, 2014 | 08:09 AM
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Originally Posted by redtan
Why are 799s better than 243s on a 3.8" bore?
Also wondering this?.
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Old Aug 11, 2014 | 10:25 PM
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Me three^^^
Waiting to hear the reasoning for this.
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Old Aug 21, 2014 | 11:32 AM
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thanks for the input guys looks like i need to find ls3 head
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Old Aug 21, 2014 | 12:20 PM
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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.
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