A friend and I had a talk about weight reduction.
#1
Rotary Enthusiast
Thread Starter
A friend and I had a talk about weight reduction.
We were discussing how much weight reduction affects 1/4 mile times.
I stated that if you take 600 lbs off a car, that should equal to a second or so off a 1/4 mile time. According to him, 600 lbs won't make anywhere near that much difference. That it'd gain about .20 of a second.
Any thoughts?
I stated that if you take 600 lbs off a car, that should equal to a second or so off a 1/4 mile time. According to him, 600 lbs won't make anywhere near that much difference. That it'd gain about .20 of a second.
Any thoughts?
#5
Rotary Enthusiast
Thread Starter
Ah, yes. BUT .60 is a long way away from .20 also.
Friends actual words were ".20 if you are lucky. If you take 600lbs off a car you aren't going to be able to feel a difference."
Friends actual words were ".20 if you are lucky. If you take 600lbs off a car you aren't going to be able to feel a difference."
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#8
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ET = ((Weight/HP)^(1/3) * 5.825)
or
Weight = ((ET/5.825)^3 * HP)
Therefore, if your car has 200hp and weighs 2800lbs it would have an estimated ET of 14.03908. If you drop 600lbs to weigh 2200lbs, the estimated ET will change to 12.95468, for a total change of 1.0844.
However, if your car has 300hp and weighs 4000lbs it would have an estimated ET of 13.8126. If you drop 600lbs to weigh 3400lbs, the estimated ET will change to 13.08424, for a total change of 0.72836.
Therefore, the effect of losing 600lbs depends on the other factors. Basically, the heavier the car the less the difference per pound, so the Camaro/Mustang guys will not see the savings that the Honda guys will.
or
Weight = ((ET/5.825)^3 * HP)
Therefore, if your car has 200hp and weighs 2800lbs it would have an estimated ET of 14.03908. If you drop 600lbs to weigh 2200lbs, the estimated ET will change to 12.95468, for a total change of 1.0844.
However, if your car has 300hp and weighs 4000lbs it would have an estimated ET of 13.8126. If you drop 600lbs to weigh 3400lbs, the estimated ET will change to 13.08424, for a total change of 0.72836.
Therefore, the effect of losing 600lbs depends on the other factors. Basically, the heavier the car the less the difference per pound, so the Camaro/Mustang guys will not see the savings that the Honda guys will.
#10
CC of L-Squared Shots
If you've managed to shave off a second on your times without upgrades, probably means you're getting better at drag racing. If you're really looking for quick times, you're going to need a much larger package of some sort.
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