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Is it possible to run lean and not knock?

1.9K views 12 replies 6 participants last post by  tlsole  
#1 · (Edited)
Hey guys,

Today i flashed gunzo's 90oct map and it knocked three times. From what i read, 1-3 counts is ok. My question is, is it still possible to run lean and not knock? I dont have a wideband and I'm not sure if Evoscan can monitor A/F ratios(just got it today). The car knocked once around 3300 (when it hits full boost) rpm and another time around 4500-4700ish. Is this ok? Maybe i can post the log on here so you guys can check it out for me and give me pointer on what to adjust? Also, i ran his 91oct map and the knock counts were similar to the 90oct map, BUT it showed that it knocked 9-12 times from 1300rpm-2300rpm (wtf?). Is this because when i shift or something??
 
#2 ·
Yes it is possible.

You need better resolution to your logs if those are all the lines that you got. A 3000-7000 pull in my car would fill a few pages if I posted it.
 
#4 ·
Get a wideband, seriously. Not having a way to monitor AFRs while driving is dangerous, especially if you're modded.
 
#5 ·
The ignore list is so majestic when trying to read the real results of those that have tried things. I agree with Eyler, doing any kind of mod on your car without monitoring it is pretty dangerous. Don't take chances, I am sure no matter how much money you have, doing something stupid that cost you thousands of dollars, just isn't worth it.
 
#8 · (Edited)
Can you guys take a look at my logs? One is the 90oct map (3rd gear pull), which i am currently running. The other two are: 1) 91oct logged driving normally (threw numerous of counts from 1300-2300ish-rpm, any clue? Could it have been in between shifts?) and the other was a 3rd gear pull.
My current mods are only AFE dry filter and Cobb Turbo Inlet. Chevron 93oct gas was used when i did these pulls.

Any advice on what to adjust would be greatful!!!! I will be getting a wideband hopefully this weekend and will be replacing my relays to all blue ones.


Edit: Attached are the logs in csv format.
 

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