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Knock after 3.25 pulley install....

markymarc

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I had the ZZP pulley system installed with a 3.25 pulley. After a scan while driving, I am getting 4-6 degrees of knock at 80% throttle. Obviously I need to do something. My current mods are:

3.25 pulley
Thrasher CAI
Intense 1.9's
Ceramic TOG's
DHP
MSD Wires
180 Thermo
Ubend

I am guessing that colder plugs are a must, but what else can I do to reduce knock? Should I see Charles to have my fuel mapping increased? The scan showed that I was running lean at certain points.

The car hauls ass like you wouldn't believe, but I am taking it easy until this issue is resolved. What level of knock is safe or acceptable, given these mods?

Any help is appreciated.
 

superchargedgp

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Originally posted by markymarc@Oct 22 2004, 08:59 AM
I had the ZZP pulley system installed with a 3.25 pulley.  After a scan while driving, I am getting 4-6 degrees of knock at 80% throttle.  Obviously I need to do something.  My current mods are:

3.25 pulley
Thrasher CAI
Intense 1.9's
Ceramic TOG's
DHP
MSD Wires
180 Thermo
Ubend

I am guessing that colder plugs are a must, but what else can I do to reduce knock?  Should I see Charles to have my fuel mapping increased?  The scan showed that I was running lean at certain points. 

The car hauls ass like you wouldn't believe, but I am taking it easy until this issue is resolved.  What level of knock is safe or acceptable, given these mods?

Any help is appreciated.
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do you get knock at WOT?
 
S

sr71_rgl

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I'm suprised you're getting any KR at all w/your mods. Like Mike said, are you getting KR at WOT? Colder plugs like a-lite 104s would probably cure all your KR. 4* of KR at WOT isn't going to hurt the motor in this weather but come summer time and 80*+ temps that KR will double. Try the plugs and post your results.
 

Glasuan

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Plugs are a must of course, and based on mods you need 3 steps colder. The only other thing I can think of is DP, and hi-flow cat. Otherwise if you are running lean, check the fuel filter, replace it if it has not been for a while (over 50k).
 

markymarc

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Thanks for the feedback. I don't have any readings from when I was running the 3.4, and the knock now is from 85% throttle, so almost WOT.

I'll try the plugs first and have it rescanned.
 

00 GTP Debadged

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I have basically the same setup and run 104's in mine. The 103's are too cold in my opinion. I see better mpg and performance with the 104's. I would definately get a hold of Charles. I see absolutely no kr with the 3.25 even on 90 degree days.

Randy
 

markymarc

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I am going to have 104's dropped in, to see if that helps. Yesterday I drove downtown to work on I90 in the cold air and loved it. The car pulls like a mo fo now. I thought this would be it for mods, but who am I kidding? Is the new ILGPC IC going to be released next year? I am thinking that is next for me.
 

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