Hot Lapping
Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,869
Likes: 61
From: montreal quebec
Hot Lapping
has anybody noticed their car running a 1/10th or faster on the 2nd run less than 5 min after the first run...and if so can anybody explain it...it seems to me and a couple of pro racers these ls1's like to run a bit warmer
Le Mans Master
Joined: May 2002
Posts: 5,446
Likes: 1
From: 10.70 @ 124mph, Stock Bottom End @ 3620lbs, ECS Racing Team Member. The 1st NMCA LSX Index Rumble World Champion. 2011,12,13 Champion
I have noticed that my first time shot is slower then my 2nd time shot, even when the weatehr will be worse. For example, My first time shot I would run 11.44, Then on my 2nd time shot I will run 11.43. My TAG weather station will predict a 11.459 for my 2nd time shot.
I think of the 1st pass as a clean out pass. I also think my commute to the track has something to do with it. It takes me 10 minutes to drive to the track, I am sure all the fluids are not warmed up yet.
After my 2nd pass, The Vette is consistent.
I almost have it down to a science if for some reason we only get one time shot.
Hope this will help you.
I think of the 1st pass as a clean out pass. I also think my commute to the track has something to do with it. It takes me 10 minutes to drive to the track, I am sure all the fluids are not warmed up yet.
After my 2nd pass, The Vette is consistent.
I almost have it down to a science if for some reason we only get one time shot.Hope this will help you.
Drifting
Joined: Jan 2004
Posts: 1,661
Likes: 13
From: Knoxville TN
Hot Lapping
I remember last year at one of the last Carolina Corvette Challenges at Darlington SC, we all qualified on the quarter mile and then when it came time for eliminations the quarter mile clocks would not work so we had to switch to eighth mile. We made one qualifying run on the 1/8 and went right back into the lanes for first round. I picked up .05 and 1/2 mph in the eighth between the two passes. My car seems to run best with the water temp above 180 degrees.
Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,869
Likes: 61
From: montreal quebec
I remember last year at one of the last Carolina Corvette Challenges at Darlington SC, we all qualified on the quarter mile and then when it came time for eliminations the quarter mile clocks would not work so we had to switch to eighth mile. We made one qualifying run on the 1/8 and went right back into the lanes for first round. I picked up .05 and 1/2 mph in the eighth between the two passes. My car seems to run best with the water temp above 180 degrees.
Race Director
Joined: Oct 1999
Posts: 13,298
Likes: 14
From: Somers NY
My LT1 is the exact oppisit... it runs best when its under 160 deg... if it goes over 180 it will slow down almost a tenth...I have a chart, & 2 data bases in my TAG..
One data for running cool, and another data base for HOT runs.. and its pretty close..
One data for running cool, and another data base for HOT runs.. and its pretty close..
Team Owner
Joined: Dec 2000
Posts: 27,897
Likes: 9
From: I have no tolerence for liberals and fools, but sometimes i repeat myself
CI 3-5-7-8-9 Veteran
St. Jude Donor '08
I could see the aluminum block motors liking a little more water temp for sure because it disspates heat into the coolant so quickly. that lost heat is lost HP. On the other hand we try to go to the lanes with our iron blocked stocker at less than 100degrees water temp, but the oil is warm
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Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
I could see the aluminum block motors liking a little more water temp for sure because it disspates heat into the coolant so quickly. that lost heat is lost HP. On the other hand we try to go to the lanes with our iron blocked stocker at less than 100degrees water temp, but the oil is warm
I hot lap and I will lose up to .20 in the 1/4.
I launch at 130 to 140 after cool down .My lt1 is the same way but I put 2 trans coolers on the 4l60e on the lt1 and it doesnt lose anything in the 1/4 that I have noticed like before the install.
Team Owner
Joined: Feb 2000
Posts: 32,545
Likes: 2
From: Lithia FL
Cruise-In II & IV Veteran
CI VI Drag Champ!
My LS1 did and LS2 does the same. That is unless it is the third consecutive then it might tend to slow and the fourth hot lap will usually be slower.
It has a sweet spot.
It has a sweet spot.
Burning Brakes
Joined: May 2006
Posts: 904
Likes: 0
From: Boynton Beach FL
