LS1 339 Head Casting Number?
Teching In
Joined: Mar 2011
Posts: 15
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I don't know what these heads are either but I have a set on my recently acquired LS1 junkyard motor. The engine came from a 2003 Corvette. The patina is consistent between heads and block so I don't suspect anything nefarious on the behalf of the junkyard.
Maybe the PO. Who knows.
Hal
Maybe the PO. Who knows.
Hal
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339 and 806 both came on early (97 and 98) LS1 engines. Not sure how they flow even compared to the 241's let alone a 243? Do you know what year Corvette it came out of? I'd guess a 97 or 98.
All ls1 heads flow nearly the Same and will perform equally as well. Apples to apples, switching from an 806 to say a 241 will not gain or lose you anything over dyno/weather variance size power.
The difference, you will never see on any dyno, any drag strip or feel on any butt dyno. Yes, they are "the best" but the difference is not worth the bandwidth this thread takes up on the net.
