how do i get rid of the KR? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 09-25-2007, 02:08 PM   #1
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Default how do i get rid of the KR?

Like many of you probly saw in the track and road section i did a new PB of [email protected] with the mods in my sig. well when we left me and my dad went to his shop and i hooked up the scan tool to it and did a few WOT runs up and down the street. well in the mid RPM i had 1 degree of KR and after about 4500-5000rpm it showed 2 degrees untill 6000. then when it shifted it hit 3 and went back to 2 and stayed there. my ignition timing was 11-12 degrees and stayed steady at 12.5 with WOT and touched 13 degrees for a split sec then went back down to 12.5 and stayed steady. i dont know much about this stuff yet and would like to know wut exactly it is telling me with those readings. and what i can do to get rid of the KR. with my mods i should be in high 13'* but i guess the computer wont let me. Thanx in advance for the input.
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Old 09-26-2007, 11:05 PM   #2
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What octane were you running?
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Old 09-26-2007, 11:43 PM   #3
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i always run Sunoco 94 octane. but i plan on a whipple or an intercooler over the winter. maybe that will help.
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Old 09-27-2007, 12:08 AM   #4
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Do you know how much KR you are getting and under what condition and a what rpm?
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Old 09-27-2007, 07:47 AM   #5
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The KR you are getting is showing up as it should in your timing. WOT timing is around 15 degrees on my 97, might be a degree or two different than yours. Take 15 degrees of timing. subtract the 2-3 KR and you get about 12ish.

Now.. what is causing your KR. What temperature/humidity levels were present? Was the motor overly heatsoaked?

We had one person say they had gotten KR from a JMB intake that was rattling or hitting body panels. Make sure yours is properly mounted and not able to rub when torque is applied to the motor.
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Old 09-27-2007, 09:42 PM   #6
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Get yourself a can of Torco fuel concentrate or some 100 octane and see if it goes away. If it does then you know.

Don't buy a whipple. Worthless for what you have. Go IC and that will definately help KR. Some engines just have KR. Mine is a good example. I fight it every day.

Also, I see your 60' time was 2.138ish. Every .1 sec in 60' is .2 sec in E/T. Get yourself some good launches and you will hit 13.xx easily.
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