SSC5R

I have set of stage 2 ls6 heads that I got from a friend. Does anybody know what they flow?

JZ'sTA

iTrader: (23)

They are probally the same as AS stage 2 heads.
LG motorsports uses AS for their heads.

Glenn98ZM6

LG only started using AS heads in the last 6 months or so. they also use another source for the top of the line heads if thats what you are looking for or are willing to spend and wait on them..

mike m

iTrader: (6)

is there a # stamped on the heads?

99 Black Bird T/A

iTrader: (4)

I would have them flow tested and not go by what someone else said. Also flow them with the LS6 or LSX intake that will help give a better picture of what they will do.

SSC5R

There is a letter A ingraved in one of the intake ports.

99 Black Bird T/A

iTrader: (4)

My S1 JPR LS6's had the A ingraved in one of the ports too. I'm not sure why it was there I assumed it was from the factory and JPR didn't remove enough material to wipe it out.

GueSS Who

Yes this is correct

SSC5R

I 'll flow them at school then. We'll see if those # are what they are claimed to be.

bigeller

iTrader: (2)

So what is the significance of the "A" in the intake port? My SDPC CNC #243 casting LS6 had a "B" in the intake port.. ???

BurnOut

iTrader: (1)

With a good (fresh) valve job, I think the LG (not AS) LS6 heads are supposed to flow in the 315-ish range at .600, though I am not certain.

SSC5R

Here is what they flow
Lift CFM
200 115
300 174
400 230
500 276
550 283
600 300
650 307
At 700 they backed off, I do have to say; they could have done a way better job on those heads. I'm not going to get into it now, but man what the.......

KGSloan

those flow numbers seem pretty good. should make some good power.

kumar75150

Uhhh if these are used heads, those numbers are not bad at all.

BurnOut

iTrader: (1)

Exactly. That's why I specified a fresh valve job... there can easily be 10-15 cfm lost because of poor flow characteristics around the seat... and, by nature, valve jobs go away over time (that whole "valve slamming shut" thing and all). Depending on how used those heads are, they may just need some freshening up.

All in all, though, 300 at .600 isn't exactly horrid.

SSC5R

They need a new valve job, valve guides and some muching due to the guides having small cracks around the guides when they were inserted. They still have some ruff spotes in the ports that need some work.