How much of an impact is weather?

[Furyous]

How much of a time difference would you expect to see from running on a 85degree day and a 63degree day? Location and everything else being the same.

.5 seconds on a 1/4 mile?

.1 ?

 

[Nowwhat]

How much of a time difference would you expect to see from running on a 85degree day and a 63degree day? Location and everything else being the same.

.5 seconds on a 1/4 mile?

.1 ?

the difference in D/A between 63 degrees and 85 = .3 sec

for a 14.00 sec truck running at 101 mph....

hope that helps...

 

[Furyous]

the difference in D/A between 63 degrees and 85 = .3 sec

for a 14.00 sec truck running at 101 mph....

hope that helps...

Hmm, I am trying to figure out how much of an impact the stage 2 computer was on my truck.

Without the stage 2, 85 Degree temperature, two runs average = 14.863 seconds at 94.815 MPH

After the stage two was added, 65 Degree temperature, two runs average = 14.303 seconds at 98.285 MPH


That's .56 seconds and 3.47 MPH faster on average with the PCM and the 20 degree temperature drop.



If the 20 degree drop in temperature can account for up to .3 seconds then the PCM can be as low as a .2 second increase?

Someone please tell me I am confused and missing a huge increase in performance somewhere

The Feb 10th timeslips are before the PCM and the APR 7th are after.

 

[nycstev]

WEll i think you go slower when the air is colder.... Just think how fast you'd go if the air were frozen

 

[BigRed460]

you changed the way you launch, 2.2 60' now then it was a 2.3. add to that the cooler air and the pcm. Thats how you knocked that much time off, now get that 60' down to 2.0 1.9 range and let her screem...

 

[Nowwhat]

Hmm, I am trying to figure out how much of an impact the stage 2 computer was on my truck.

Without the stage 2, 85 Degree temperature, two runs average = 14.863 seconds at 94.815 MPH

After the stage two was added, 65 Degree temperature, two runs average = 14.303 seconds at 98.285 MPH


That's .56 seconds and 3.47 MPH faster on average with the PCM and the 20 degree temperature drop.



If the 20 degree drop in temperature can account for up to .3 seconds then the PCM can be as low as a .2 second increase?

Someone please tell me I am confused and missing a huge increase in performance somewhere

The Feb 10th timeslips are before the PCM and the APR 7th are after.

Boss...are you running in the Tow/haul mode...?....

make sure you are....


As far as the weather is concerned....ie...the D/A....you need more info then just the temp....humidity can impact your times...but the big factor is the barometric pressure...

your truck at a 1500' D/A should run mid 13's at 101-103 with a 2.1 60'

make sure you run 22psi in the rear tires....

 

[Furyous]

Boss...are you running in the Tow/haul mode...?....

make sure you are....


As far as the weather is concerned....ie...the D/A....you need more info then just the temp....humidity can impact your times...but the big factor is the barometric pressure...

your truck at a 1500' D/A should run mid 13's at 101-103 with a 2.1 60'

make sure you run 22psi in the rear tires....

Humidity was next to nothing on Feb 10th, it was really humid on Apr 7th (sprinkling on and off). FEB 10th I was running 45 PSI and lowered it to 38 before APR 7th.

I know it isn't a lot to go on, I am just trying to get a better understanding of all this

 

[AWDisuzu]

just my experience.

-18 psi in tires, + good burnout = NO off the line spinning. (2.0 60')
-tow/haul button makes no difference at all at WOT, times are the same either way for me
-truck goes .5-.7 faster on a cold motor vs fully warmed up.