This is my first time really trying to tune my newly acquired Evo. I tried to lean it out up top and make the timing a little more aggressive; however, for some strange reason I'm getting knock down low that tapers off up-top. Any suggestions?

Knock starts at 10 counts and tapers down.

 

Defintely too much timing advace at the peak boost!

 

Gotcha, I'll lower it and post a new log later.

 

Post the .csv log data

 

I ran 8* of timing at 3k rpm on 93 octane. now i run 5* of timing at 3k on 91 octane.

 

What is your AFR when you hit the 5* timing? What is your timing @ 3700 rpm?

 

at 260 load, it is 9.7@3k and 9.1@3.5k
timing, starting at 3k, is 5, 5, 6

 

9.1 AFR? Can anyone see anything behind you when you go WOT?

 

too rich

 

lol, i am talking about the numbers i have on the table!

 

lol

 

dyno graph approx numbers on a 3rd gear pull and 91 octane
3k ~ 12.3 afr
3.5k ~11.7 afr
3.7k ~ 11.4 afr (max torque)

averaging at 11.4 afr dropping down to 11.1. its an agressive tune.

when i was in michigan, i tuned it to 11.7 afr

 

i think that might be richer than stock lol

 

are you tuning with a wideband o2 sensor?

 

yes, the zeitronix