I had a few posts here regarding truck problems. I was running some pretty bad times for the L and I couldn't figure out why. Well, the intercooler wasn't working from the day I drove it off the lot, I just didn't know it. Now I have some track times I can share to show the effects of an intercooler not working. This is probably nothing new to you Veteran L brothers and sisters but maybe this can help any newbies troubleshooting problems with their L's.

This is what I ran consistantly with the intercooler not working
San Antonio Raceway
Temp was about 87 degrees w/about 60% humidity
60 ft. times - 2.6
1/4 mile ET - 15.33 @ 92.25 mph

This is what I ran consistantly with the intercooler working
San Antonio Raceway
According to the WBGT instrument (which is very accurate) I took to the track with me the temp was 86 degrees w/78% humidity
60 ft. times - 2.21
1/4 mile ET - 14.47 @ 96.46

I'm a little disappointed with the times and mph. But the good thing is I know it's the driver and not the truck and I can do something about that. Plus it was pretty hot and muggy and I was hot lapping. Anyway, I thought some of you might find it interesting in how much difference the intercooler makes.

Edit: By the way, the intercooler pump wasn't working because a pin on the electrical connection was pushed up into the plastic connector. The problem was hidden so well that none of the diagnostic checks showed a problem. It took the dealer a full day to find the problem.

 

Good Info

 

Looks like your 60' accounted for most of the drop, BUT you can't ignore the 4mph in trap speed. Definitely seems like it helped big time.

 

your corrected times seem about right for a stock L in San Antonio in the summer. I ran a 14.60 when my truck was new in june '99. Wait for the fall and put about 3K miles on it and you should be doing 13.8 or better. (that's about a 13.0 or 13.2 in New Jersey )