Trap speeds all over the place, false knock maybe??
05-24-2003, 04:20 PM
#1
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Join Date: Mar 2001
Location: Costa Mesa, CA
Posts: 2,521
Trap speeds all over the place, false knock maybe??
Guys I've been getting a variance in my trap speeds of 2mph in the 1/8 and over 3mph in the 1/4. I would chalk it up to traction, but I'm running drag radials and every launch is a let off the brake, floor it and go.
Example, last time at the 1/4, my car trapped a best of 103.69, and later on in the day it only trapped 100.0. Now, the relative humidity was the same, but the temperature went up 10*(ambient). I KNOW 10* temperature increase does not equate to me losing 3.7mph.
I was thinking maybe some of this is due to false knock? I don't have any way to scan it and see what's going on. Has anyone been able to fix a problem like this with an LT4 knock module?? Also does anyone have the part # for it??
John
Edit: mods are included in the link in the sig
Example, last time at the 1/4, my car trapped a best of 103.69, and later on in the day it only trapped 100.0. Now, the relative humidity was the same, but the temperature went up 10*(ambient). I KNOW 10* temperature increase does not equate to me losing 3.7mph.
I was thinking maybe some of this is due to false knock? I don't have any way to scan it and see what's going on. Has anyone been able to fix a problem like this with an LT4 knock module?? Also does anyone have the part # for it??
John
Edit: mods are included in the link in the sig
05-24-2003, 05:08 PM
#2
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Join Date: Nov 2000
Location: Orlando, FL
Posts: 906
It could be so many different things. False knock is possible though, definitely. Try the KM and see if it works, if it does, it was a nice cheap fix. You don't really have anything to lose except 30 bucks.
05-24-2003, 06:12 PM
#3
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Thread Starter
Join Date: Mar 2001
Location: Costa Mesa, CA
Posts: 2,521
Looks like about $38 shipped from www.gmpartsdirect.com ...... I might try it out and see how it goes......
Any more comments??
John
Any more comments??
John
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