TurboAv

iTrader: (6)

I keep showing 1-2* of KR around 5200rpm. Even when timing is low. From 4200-5200 my timing drops from 16 to 10 then goes to 11 at 5600, 13 at 6000, and 15 at 6400. Even with timing that low I'm showing KR and I'm on E85 and a 15gph meth nozzle on maximum. Lambda of .73-.74 during a pull. IAT in the 30's. WTF?

So then I added some timing back and yup it's still there and maybe a touch worse. Timing goes from 17* to 12* 4200-5200. Then 13, 15, 16 after 5200. How the heck am I getting KR with amount of fuel I have?

Even the above timing figures are lower than how I got the car tuned as the 5200 cell was 14* and 15* after 5200. I can hear my exhaust rattle/vibrate sometimes. Can that set off the LS3 sensors? Can I adjust the sensor sensitivity? All that messed with on the knock sensors is the decay rate and attack.

TurboAv

iTrader: (6)

Changed the tune to 11* at 5200, then 12* the cell after, then 13*, 15*, 15*. Had a couple of small blips. I'll post the log when I get off work tomorrow morning. I'll probably lower the top timing to 14* and try it again in the morning. At least I can go WOT in 3rd now, lol. No point in having 750rwhp if I can't use it until I'm going 70mph in 4th gear. I'll build a tune for running drag radials, but for street tires it's getting turned down.

NicD

iTrader: (7)

It's always most sensitive around peak torque which is why timing will be lower in that area. I generally flatline after peak torque on a setup like yours because of the variable boost conditions with the changing weather conditions. Adding timing after the peak torque area is great for dyno numbers and also great for putting it on the edge on the street in a long pull.

TurboAv

iTrader: (6)

Here's what happened when the timing was set to 13* at 5200. Is it just the cold weather/better air/more boost that's making it do this?

NicD

iTrader: (7)

Could be, or it could be something hitting that resonant frequency that the knock sensor looks for. Without it being on the dyno and watching the exhaust for puffs and listening to the motor it's hard to say for sure.