robertbartsch

Just swaped H/C on F-body and now I have approximately 11.4 to 1 compression with standard LS1 tuning.

Someone on the Tunning forum here indicated that his new LS6 engine was ruined by knock; he was running stock LS1 tunning. Apparently, the higher CR LS6 engines (10.5CR)cannot run as much spark advance as a stock LS1 (10.1 CR). His advice to me is to get a tune immediately.

My car runs great!

Has any one else had a similar experience?

Speed Demon

iTrader: (14)

You should atleast Autotap it to verify that there is no knock.

CHRISPY

You can run 30 degrees WOT timing on an LS1 if you have the right AF. I would think you would do damage more from running lean than advance.

My timing is 4000-5000 28 degrees, 5000-6000 29 degrees 6000-7000 30 degrees with zero knock on 94 octance. (I am 10.8:1 comp) with 160 stat.

Cheers,
Chris

muscratmauler

I am at 28-29 degrees with 11.4 CR

2001CamaroGuy

iTrader: (6)

I have an 11.1:1 CR....

I am at 27 durring the summer on 91 (a little knock up around 5500RPM)...

Durring the winter/with 93 I can go up to 28 or 29 degrees (perhaps more if both 93 and its cool out)....

eb02z06

iTrader: (18)

Then why do all LS6 vettes such as my own only run 22.5 stock. I haven't tried yet but from what I hear there is nothing to be gained by adding more-even on a stock 02 Z06, which is fat from the factory (12.0 to 1). I've heard nothing but knock issues if the timing is increased on these 02 LS6 motors which have 10.5 to 1 stock.

BLK02WS6

iTrader: (2)

I'm the one from the other post. I thought over there you said you had LS6 heads...you don't say that here. Like I said over there - it is not the compression ratio so much as the design of the LS6 head that requires less timing.

What heads do you have - that would help clear it up for these other guys commenting.

robertbartsch

BlackO2WS6:
Oh OK, thanks:

Heads = 2002 LS6 Lingenfelter ported, milled .055 (the ASA heads)

Cam = 220/220, 564/564, 112 LSA

My freind A-Tapped the car recently; I'll ask him if any knock was detected; as I mentioned before, my car seems to run great....I only have about 250 miles on it since the swap....

it did throw a code but it was a passenger side rear 02 sensor that i need to check...this is not a sing of knock, right?

BLK02WS6

iTrader: (2)

No, rear O2 sensor just tells you if your cats are working.

That information on your heads will make a difference in the feedback you get - I think a lot of the above thought they were LS1 heads.

Did you see what the Z06 owner above said - that is some low timing compared to the LS1.

If you have access to A-Tap, I would get KR logged and check it out!

Personally, I am going with the stock LS6 timing table right from the start and leave it that way. Like he said above, I've heard there is no advantage to advancing timing anywhere on an LS6.