How would the following affect performance?
Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,469
Likes: 6
From: Winchester Ontario
How would the following affect performance?
How would dropping 140 pounds and dropping 0.2 seconds in the 60 ft. time affect 1/4 mile ET and MPH?
Would it drop ET by 0.54 and up MPH by 1.4 MPH?
Heres what I was thinking...
Drop 140 lbs. = 0.14 sec and 1.4 MPH gain
Drop 0.2 sec (60 ft.) = 0.4 sec gain
0.14 + 0.4 = 0.54 sec and 1.4 MPH
Right? Wrong? Close?
Would it drop ET by 0.54 and up MPH by 1.4 MPH?
Heres what I was thinking...
Drop 140 lbs. = 0.14 sec and 1.4 MPH gain
Drop 0.2 sec (60 ft.) = 0.4 sec gain
0.14 + 0.4 = 0.54 sec and 1.4 MPH
Right? Wrong? Close?
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
I think you are pretty close:
Drop 140 lbs. = 0.14 sec and 1.4 MPH gain
....true
Drop 0.2 sec (60 ft.) = 0.4 sec gain
....maybe 0.3sec gain
0.14 + 0.4 = 0.54 sec and 1.4 MPH
...so 0.14 + 0.30 = 0.44 sec and 1.4mph
Assuming weather is the same as on the baseline runs.
Drop 140 lbs. = 0.14 sec and 1.4 MPH gain
....true
Drop 0.2 sec (60 ft.) = 0.4 sec gain
....maybe 0.3sec gain
0.14 + 0.4 = 0.54 sec and 1.4 MPH
...so 0.14 + 0.30 = 0.44 sec and 1.4mph
Assuming weather is the same as on the baseline runs.
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Originally Posted by black_89_vette
How would dropping 140 pounds and dropping 0.2 seconds in the 60 ft. time affect 1/4 mile ET and MPH?
Would it drop ET by 0.54 and up MPH by 1.4 MPH?
Heres what I was thinking...
Drop 140 lbs. = 0.14 sec and 1.4 MPH gain
Drop 0.2 sec (60 ft.) = 0.4 sec gain
0.14 + 0.4 = 0.54 sec and 1.4 MPH
Right? Wrong? Close?
Would it drop ET by 0.54 and up MPH by 1.4 MPH?
Heres what I was thinking...
Drop 140 lbs. = 0.14 sec and 1.4 MPH gain
Drop 0.2 sec (60 ft.) = 0.4 sec gain
0.14 + 0.4 = 0.54 sec and 1.4 MPH
Right? Wrong? Close?
seems about right, but maybe dropping 0.2 might gain closer to 0.3-.035
Burning Brakes
Joined: Nov 2003
Posts: 914
Likes: 1
From: Redding Ca
MPH is mainly a function of horsepower. So unless the .20 60' reduction is related to HP increase, you may see no improvement in MPH (ie, it could be related to traction slippage you have corrected or higher stall converter)
Last edited by GeosFun; Oct 3, 2005 at 05:47 PM.
Race Director
Joined: Dec 2002
Posts: 13,348
Likes: 233
From: SCMR Rat Pack'r Charter Member..Great Bend KS
Originally Posted by GeosFun
MPH is mainly a function of horsepower. So unless the .20 60' reduction is related to HP increase, you may see no improvement in MPH (ie, it could be related to traction slippage you have corrected or higher stall converter)
It depends on how you go about reducing your 60ft times.
If you just improve your launch technique, then the .2sec gained at the start just puts you .2sec closer to the end of the track and your total et improvement will be .2sec.
If you gain (lose, actually) that .2sec through a power increase or better bite through first gear, then who knows what your betterment in et will be...but whatever it is, it won't be from improving the 60ft times;
the improved 60ft times will be a result of what creates a better overall et, it's not the cause.
Cause and effect, cause and effect.
Maybe someone can explain the apparent importance of 60ft times. Why not 120ft times? or 1000ft times? or...gulp...1320ft times??
Is it just a convenient distance that has become a standard?
I'm thinking that is the answer...
Larry
code5coupe
