ChevPower

iTrader: (8)

Ok some of you know my set up, Its a 383 all stroke 12.1 compression on 93 octane we have been running a 200rwhp shot with a stand alone low pressure fuel system with 116 NOS fuel, I have been playing with timming and at this point i am running 26.5* of timming on the spray with 0 ko, The car has picked up .1 in the 1/8 mile on 5* I have done plug chops and i'm 100% sure there 0 detonation,

Should i keep going with timming untill i see a little knock then come back down? Or run less octane in the fuel system? Or leave it the way it is and be happy with it?

1QuickT-A

iTrader: (12)

I'm assuming that you have upped the timing from 26.5* to 31.5* and picked up the .1 and didnt get any detonation/ko?? Thats pretty high for 12:1 compression and a 200 shot. Might want to leave it where it is just to be safe..

I am also curious as to what your cars put down on the dyno and what it runs at the track? Care to share any more info on your setup?? (heads/cam/trans/rear gar/weight,etc)

white2001s10

iTrader: (4)

I'd cut a little fuel back (the 93 octane), as in lean down the bottom end a bit more. In the lower gears you don't need quite as much fuel.

ref this thread for some more info.
https://ls1tech.com/forums/pcm-diagnostics-tuning/479580-air-fuel-question.html

ChevPower

iTrader: (8)

The 26.5* is after the 5* advance. At 21.5* the car went a 6.38 at 26.5* it went a 6.28 in the 1/8
5.3 heads hand ported,Comp Cam custom grind 248/254 622/613 115LSA +2, Built 4L60E,12 bolt moser,3.73s,3540lbs without the wife in it.
the dyno #s are low but the track says its wrong here is a video of the wife last Saturday at the track.

http://media.putfile.com/PAULASUPHIGH2

brad8266

iTrader: (23)

Badcass car, advance it till it pings then come back. Be careful though. That run was ****** sick.