crossbredfoxbody

has anyone had any luck with the 799 ls1 heads?

allan808

iTrader: (3)

i think those are identical to ls6 heads 243...i could be wrong thou..

slowlsx

iTrader: (28)

yup...

crossbredfoxbody

The specs are the same but the casting is very rough

wads97gts

iTrader: (3)

Identical to the 243 heads. There are C6 Corvette guys with 1 243 and 1 799 on their engine!

Jon@Texas-Speed

iTrader: (18)

Basically the same casting, just different numbers. Not a bad head at all.

Jon

bshay20

what springs are in the 799 head off a l33 5.3l??

BlackScreaminMachine

iTrader: (17)

You should send these heads to me, you prob do not need them, but I could find a use.

Jon@Texas-Speed

iTrader: (18)

I believe they are like a standard LS1 spring. They aren't the "yellow' LS6 springs that everyone wants. We pull them off and throw them in a box when we port them.

Jon

Fb0dy0nly

iTrader: (10)

Yeah If your going any bigger than stock on the cam size, like per say, the Ls6 cam, Id grab a set of thoses yellow beehive Ls6 springs and retainers. They will keep the valvetrain alive and it will run smoother and be happy and say thank you when ur in higher rpms.

If you go aftermarket like comp cam or anything bigger than ls6 cam, Id grab a set of double springs or some beehives that will handle the lift on the new cam.

Doing heads/cam goes hand-in-hand, esp IF you are for sure doing the heads like in you're case. You will already have 90% of the stuff off the block to do it and the extra kick in the *** when you stomp on it will make it well worth it to do it all now. Adding a cam on your Ls1 with the 799 heads will help a ton more than just using the heads alone. Will def wake that engine up!

JUST REMEMBER IF YOU DO A CAM TOO, TO MATCH THE CAM AND HEADS WITH THE ENGINE. THINK about what you want as far as goals, the valvetrain is very important on these engine and MAKING the right setup can have a huge impact on the performance of the whole engine/car, in a good way of course

Pro-Tour Heavy Chevy

I thought the 799 Heads had a Smaller Combustion Chamber that the regular(862) 5.3 Heads have, but with port design of the LS6 head.

SOMbitch

iTrader: (8)

No they have a 64cc chamber just like a 243 head.....

Jon@Texas-Speed

iTrader: (18)

They are indeed 64cc on the chamber volume.

Jon

A.R. Shale Targa

iTrader: (2)

SUX that GM discontinued their cyl.head assemblies which were about $450
each.....SDPC has a few bare 799's for 600 a piece....OUCH