243 or 799 heads?
08-19-2009, 07:33 PM
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243 or 799 heads? I have 2 L33 engines in my pole barn and about to use one in a 93 rx7 I plan to have the heads ported and larger valves installed in one of the sets of heads I have both 243 qand 799 which are better and why.... I also plan a tr224 cam ls5 intake and ported thorttle body with 28.8 injectors any input would be greatly appreciated!
08-19-2009, 08:15 PM
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LS6 243s had light weight valves.
LS2 243s had regular valves, same as 799s. They are the same... some Corvettes even have one 243 and one 799.
08-19-2009, 08:24 PM
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2005+ LS2 and LS4 (front drive G-bodies) used the 243 casting, but with standard valves. The 799 used a different casting process than the 243. In my opinion, the 243 is the better casting (stronger, better machining).
08-19-2009, 09:18 PM
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I have never seen a Corvette with 2 different cylinder heads but you are correct the LS2 has regular vavles I was only referencing LS6 243's.
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08-21-2009, 08:57 AM
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ok good information, so either route I go I will be fine, I'm not building a drag car, I'm just running a L33 5.3 with ls6 intake tr224 112lsa cam and 28.8 injectors, I will be happy with that I'm sure.
