SoundGuyDave
This Space For Rent
- Joined
- Apr 9, 2007
- Posts
- 1,978
- Reaction score
- 28
Okay, something is just plain wrong... Last month I went to the track and ran the following best:
60' 2.033
330' 5.676
1/8 8.665 @ 82.72MPH
1000 11.253
1/4 13.459 @ 101.93MPH
The only mods at that time were a CAI/tune and 3.73 gears, NO lightening.
Today, the best I could do was:
60' 2.034
330' 5.746
1/8 8.811 @ 80.56MPH
1000 11.449
1/4 13.703 @ 97.79MPH
With the following mods: BMR springs, UCA, LCA, sways, panhard, D-Specs, Steeda bump-steer, 18x9.5 rims with Nitto 555's (255/45 front, 285/40 rear), jack and spare pulled. Front tires at 35psi, rears at 27psi, front struts at max soft, right rear at full firm, left rear one turn back from full firm. Also, have Steeda CMCV delete plates (with a new tune, of course), and Roush underdrive pullies.
May's weather was 78 and dry, today was 93 and 90%, so I'm sure I lost a bunch in the air. Since this was a club outing, I was running against the same people, and in general, EVERYBODY was running around 4/10's to 5/10's slower than last month. Based on that, I theoretically picked up about 2/10's, which seems quite low for the mods. I lost 4MPH, but the average loss was only about 2MPH.
The "butt dyno" is telling me that I'm launching harder with less wheelspin than last month, but the 60' times really haven't changed, despite the suspension and traction work that has been done. And yes, before you ask, the car was aligned post-install, and the pinion angle is -1.9 degrees, with a 0.01 degree thrust angle on the rear end, and less than 1/32" wheelbase differential. Front camber is -1.5, with 1/16 toe-in total, with rod-end tierod ends.
Could the weather have hurt the tune THAT badly? Would it affect the 60' times that much? I was hoping for 1.8 60's, and I'm clearly still above the two-second mark.
One of the cars I raced was another '06 auto, (ran twice), with nothing more done than a K&N CAI and tune flash. Here are the times:
RACE ONE RACE TWO
-----------HER-- ME------- HER -- ME
DIAL -----13.99 --13.79 ---13.99-- 13.79
RT -------.092 ---.355 ----.275 ----.606 (ouch!)
60' -------2.185-- 2.118--- 2.243-- 2.071
330------ 5.937-- 5.826--- 5.992-- 5.791
1/8 ------9.009--- 8.862--- 9.053-- 8.836
MPH -----80.34 ---82.64--- 80.82-- 82.23
1000 ----11.641-- 11.495-- 11.671 -11.475
1/4 ------13.887- 13.773--- 13.901 13.720
MPH -----99.80--- 98.56 ---100.52- 98.36
Since we're both autos, and are "foot to the floor" from end to end, I'm still scratching my head as to how the other car beat my MPH, particularly since IN THEORY, I'm making a handful more power, and with a taller gear to boot... I don't have the slip handy, but last month, we were within .01 seconds of each other...
Any thoughs or observations (excepting "give it up") anyone may care to contribute would be MUCH appreciated. I know that I'm carrying more unspring weight now, and more rolling resistance, but I'm also supposed to be making more power, and I did shed a good 30lbs worth of spare, jack, and gak, and 3/4 of a tank of fuel...
I know that I would benefit from drag radials, but this was a street-tire to street-tire comparison.
60' 2.033
330' 5.676
1/8 8.665 @ 82.72MPH
1000 11.253
1/4 13.459 @ 101.93MPH
The only mods at that time were a CAI/tune and 3.73 gears, NO lightening.
Today, the best I could do was:
60' 2.034
330' 5.746
1/8 8.811 @ 80.56MPH
1000 11.449
1/4 13.703 @ 97.79MPH
With the following mods: BMR springs, UCA, LCA, sways, panhard, D-Specs, Steeda bump-steer, 18x9.5 rims with Nitto 555's (255/45 front, 285/40 rear), jack and spare pulled. Front tires at 35psi, rears at 27psi, front struts at max soft, right rear at full firm, left rear one turn back from full firm. Also, have Steeda CMCV delete plates (with a new tune, of course), and Roush underdrive pullies.
May's weather was 78 and dry, today was 93 and 90%, so I'm sure I lost a bunch in the air. Since this was a club outing, I was running against the same people, and in general, EVERYBODY was running around 4/10's to 5/10's slower than last month. Based on that, I theoretically picked up about 2/10's, which seems quite low for the mods. I lost 4MPH, but the average loss was only about 2MPH.
The "butt dyno" is telling me that I'm launching harder with less wheelspin than last month, but the 60' times really haven't changed, despite the suspension and traction work that has been done. And yes, before you ask, the car was aligned post-install, and the pinion angle is -1.9 degrees, with a 0.01 degree thrust angle on the rear end, and less than 1/32" wheelbase differential. Front camber is -1.5, with 1/16 toe-in total, with rod-end tierod ends.
Could the weather have hurt the tune THAT badly? Would it affect the 60' times that much? I was hoping for 1.8 60's, and I'm clearly still above the two-second mark.
One of the cars I raced was another '06 auto, (ran twice), with nothing more done than a K&N CAI and tune flash. Here are the times:
RACE ONE RACE TWO
-----------HER-- ME------- HER -- ME
DIAL -----13.99 --13.79 ---13.99-- 13.79
RT -------.092 ---.355 ----.275 ----.606 (ouch!)
60' -------2.185-- 2.118--- 2.243-- 2.071
330------ 5.937-- 5.826--- 5.992-- 5.791
1/8 ------9.009--- 8.862--- 9.053-- 8.836
MPH -----80.34 ---82.64--- 80.82-- 82.23
1000 ----11.641-- 11.495-- 11.671 -11.475
1/4 ------13.887- 13.773--- 13.901 13.720
MPH -----99.80--- 98.56 ---100.52- 98.36
Since we're both autos, and are "foot to the floor" from end to end, I'm still scratching my head as to how the other car beat my MPH, particularly since IN THEORY, I'm making a handful more power, and with a taller gear to boot... I don't have the slip handy, but last month, we were within .01 seconds of each other...
Any thoughs or observations (excepting "give it up") anyone may care to contribute would be MUCH appreciated. I know that I'm carrying more unspring weight now, and more rolling resistance, but I'm also supposed to be making more power, and I did shed a good 30lbs worth of spare, jack, and gak, and 3/4 of a tank of fuel...
I know that I would benefit from drag radials, but this was a street-tire to street-tire comparison.