00 black ss

iTrader: (9)

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

Jon@Texas-Speed

iTrader: (18)

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

Jason 98 TA

iTrader: (4)

Don't forget we also offer brand new 799s fully assembled for $450!!

tspence45

iTrader: (30)

Is that with stock valve springs, or aftermarket ones? I may just take that route with my new 6.0, for now.

00 black ss

iTrader: (9)

the 799 is the same thing as the 243

King Nothing

iTrader: (9)

is it?

NAVY99B4C

iTrader: (7)

it is?^^^

02*C5

iTrader: (1)

Yes I have seen the 799 go for a ridiculous low price on ebay. At least 2 sets south of $400.

King Nothing

iTrader: (9)

same flow and everything as a LS6 243?

02*C5

iTrader: (1)

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

BaddBird

iTrader: (6)

Look for a 04 and up grand prix gxp or a impala ss with a 5.3 LS4 they came with 243s.

00 black ss

iTrader: (9)

so the 799 flow the same as the 243s? ill just pick up a set of those for at least 150 cheaper

no1izspeshl

iTrader: (19)

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.

yarrie

Anybody know what the 243's flow, and the comparison between the 241's and 243's?

yarrie

I just picked up some 243's off an 5.3 truck, and was wondering if they were the same as the heads on the ZO6

King Nothing

iTrader: (9)

**** i might just buy some 799's. do the sodium filled valves even make a difference performance wise?

no1izspeshl

iTrader: (19)

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.

King Nothing

iTrader: (9)

you can change out the valves correct?

King Nothing

iTrader: (9)

nevermind

02*C5

iTrader: (1)

That's when you want the lighter valve train. The less weight the less wear over all on your lifters and so on. Set up with the correct springs it should be good to go. My cam if from Ed Curtis very aggressive lobes and I have the LS6 valves/Gaterman Ls1 lifters/comp 921 springs purrs like a kitty. My heads where done by AI and running 64CC chambers.

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