243 heads
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243 heads I'm wondering what applications the 243 and 799 series head came on I was planning to go to local junk yards but need a list of the applications they are on
243's cam on LS6 vettes, 05-07 LS2 vettes, 05-06 GTOs, and even the new 5.3L trucks have 243 casting heads. 799's came on some later LS2 motors as well as the trucks. That should get you a pretty good vehicle base to start with. 
Jon
Jon
Don't forget we also offer brand new 799s fully assembled for $450!!
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Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
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Verdad Gallardo The 799 heads are in fact an LS6 casting. They list part no. 12564825 for the 01-04 LS6 engines and the L33. The L33 takes its cylinder heads from the LS6. Originally developed for the Z06 Corvette, these heads improve airflow in and out of the engine. With their pent-roof combustions chambers and new flat top pistons (the pistons in other Gen III Vortec 5300s have a slight sump in the piston deck), the L33’s compression ratio increases from 9.5:1 to 9.9:1. This increase improves the engine’s volumetric efficiency yet still allows it to achieve full power with regular grade gasoline. They have a D shaped exhuast opening. The heads have a 65cc combustion chamber and a 210cc intake runner.(Silver05GTO 2007)
http://forums.corvetteforum.com/c6-t...experts-3.html
http://forums.corvetteforum.com/c6-t...experts-3.html
Yeah 799s are the virtually the same as 243s. The only upside to ls6 heads were the fact they had sodium filled valves on z06 vette heads. Otherwise as far as the head itself 243 and 799..same thing.
I am sure there is a performance aspect to it all, but from what I have read it helps with a lighter valvetrain. I am thinking for the higher rpms the ls6 was a capable stock. I could be wrong. If so someone will correct me.
http://www.youtube.com/watch?v=8SLz1a2BwSE
241
Stock Head Flow Numbers
Chamber 66.67 cc------0.100--0.200---0.300---0.400---0.500---0.550--0.600
Intake 200 cc------------67----122-----178-----215-----219-----223---227
Exhaust 70 cc------------52-----97-----133-----156-----170-----76----180
243
Stock Head Flow Numbers
Chamber 64.45 cc-------0.100---0.200--0.300--0.400---0.500---0.550---0.600
Intake 210 cc------------62------126----184----224-----251----256----257
Exhaust 75 cc------------57------108----143----163-----176----180----183