mph drops bad after first pass at the track? normal?
Thread Starter
TECH Senior Member
iTrader: (2)
Joined: Nov 2001
Posts: 9,971
Likes: 2
From: Tampa Bay
mph drops bad after first pass at the track? normal? Drove the car to the track today. about an hour and 15 minute drive nearly all highway. i have noticed the last few times at the track that my mph drops 3 mph or more from my first pass of the day to the second and beyond. the tire psi is within 2 psi. is it possible the tranny fluid is getting so hot that i loose mph? my 1/8th mile MPH are nearly dead on as well. my 1st and 2nd runs were within 5 minutes of each other.
Built Art Carr 4L60e
B&M tranny cooler
Yank ST4000 convertor
28x9 et drags
My ETs are dead consistent only varying a few hundredths of a second.
tried to cool the car off waiting nearly an hour. only gained 1 mph back up.
here are all four passes of the day. http://www.revxtreme.com/gallery/alb...4-16%20BMP.JPG
Built Art Carr 4L60e
B&M tranny cooler
Yank ST4000 convertor
28x9 et drags
My ETs are dead consistent only varying a few hundredths of a second.
tried to cool the car off waiting nearly an hour. only gained 1 mph back up.
here are all four passes of the day. http://www.revxtreme.com/gallery/alb...4-16%20BMP.JPG
Last edited by gator's 99TA; Apr 17, 2005 at 01:19 PM.
Could also be track prep, after alot of cars run on a track, it can start to get sloppy. Are you running it in the daytime, where the temp is getting hotter outside, or is it getting cooler?
A hot 4L60E could have something to do with it. Both times I've noticed that at the track (and it wasn't weather related) I had a 3-4 clutch pack go with in the next month.
I installed low/high speed fan switches that I kick on right after I pass the traps. If i'm hot lapping I keep them on high untill I finish the burnout. If I park I keep it running on low for awhile to keep cool air moving under the hood.
Sounds like its just getting to hot, either the motor, trans or both.
Sounds like its just getting to hot, either the motor, trans or both.
