rawlitogut

My stock timing is 22.8 okay, lets say 23 degrees. Some say to advance in two increments. How much should i advance it? Right now i have it advance by 4 degree's and my o2's are 9.15. Thats alittle rich right?

But to me it runs better at 9.15 then when its at 8.95. I i guess i need to put it on the dyno.

Another thing to me it dies out in third gear. I ran a couple of guys on the street,we where pretty close,but when i shift to thrid it falls back. WTF is going on! I dont know if iam runnng to much timing,lean,or to rich??

02RedHawk

iTrader: (17)

Stock heads, LS6 cam, LT headers. 93+ pump premium fuel; I run 30-degrees max timing at WOT with 0.0 KR.

P Mack

iTrader: (6)

Using your o2 voltage to tune is not the best idea. On the same dyno I've seen 14:1 read 930 mv and 13:1 read 870 mv. There's really no correlation. 28 degrees is a pretty normal number for timing at wot.

Rays C5

With ls1edit I've inched it up to 30 with mods in sig. There is a very long post (informative) on here challenging the " give it as much as you can before k.r. then back off a degree or two." This method has worked for me in the past but if done "globally" you may take out timing where it might be needed.

Rays C5

BTW that was during 40-50 degree weather.fwiw.

rawlitogut

Maybe thats my problem,like i said it runs better. When o2s are at 9.15 then 8.95. Iam running lean and it doesnt show it. My main concern is the topend.
Lowend is perfect to me. Can anyone help me with that,why does my topend dieout? Do i have to much timing? not enough?

Slowhawk

iTrader: (12)

Every car is different.I've tuned them anywhere from 22 degree's to 30 degree's at WOT.Really matter's on the engine combo.And No,more timing without KR doesn't mean your making the most HP

Wild85

iTrader: (1)

I have a carbed 350 and have 43 degrees total timing, with a 670 street avenger carb with 65/68 jets. The engine makes 350hp at 5500 rpm, and no pinging at 43 degrees, it is killing my top end though, so what i am saying is too much timing pumps up bottom end but kills top end.

rawlitogut

What Is stock timing for a ls1?

GTO_Scott

iTrader: (3)

Here is the stock 2004 GTO LS1 high octance advance table - You also will see negative values in the IAT table that would affect this.

JS

iTrader: (4)

26 to 28 max....
Slowhawk tuned baby

cyclerage

iTrader: (59)

I have milled heads so my total wot is about 24* but I also noticed a jump in trap speed when I started backing out timing around 5Krpms, just afew degrees up top.

Steve Burger

iTrader: (33)

28 at WOT

dynocar

I agree 100% with that statement. We do a dyno pull, advance or retard timing 2 deg, then overlay the HP graphs. Often we see gains in some RPM ranges and losses in others. So we adv/ret only the RPMs that need it. This only works with a load bearing dyno simulating the actual engine load in the highest gear that it will be raced in. Carberated engines require more timing then EFI, slower burn due to poorer fuel atomization. There can be many other reasons also. This ability to fine tune is why fuel injected cars are usually quicker due to broader power band, even though carbed cars may produce more peak HP.

EJ

rawlitogut

I have diablo,so i can tune every little rpm. That sucks.

They tune is off, in frist its perfect 895,bangs secound runs alittle rich 9.10,hits third 905 and at the top of third lean 870. Wtf i need a custom tune. No matter what timing i run its like that.

txhorns281

iTrader: (12)

30-31 degrees, no KR at WOT, 12.8 to max tq, 13.2 to max hp, 13.0 to redline