243 or 799 heads?
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!
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From: Southaven, MS (near Memphis, TN)
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.
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).
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Joined: Mar 2008
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From: Largo,FL
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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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.
