Pounds(weight) = Horsepower??

[Joe PR5]

I heard from someone that every 4 pounds(or 7) I dont rember, equal a horsepower? Can anyone back me up?

 

[spazspike]

I know each gallon of gas checks in at about 7lbs

 

[Equinox]

if that is true I never would have thought it was only 7 lbs to make an hp. figured somethign in my head like 20 or 30lbs, but never really sat down and thought it out

 

[Matthew]

im pretty sure you take the stock vehicle weight (~2700 lbs) and divide by the stock vehicle horsepower (130)...thats how much weight per hp you have, so you must remove about 21lbs per hp

 

[mygreenmazda]

That sound right.

 

[ATLskate]

For every 100lbs you remove from your vehicle, you'll increase .1 seconds in the 1/4 mile.

 

[cortez]

I've heard that "rule of thumb" about the 100 pounds = .1 seconds on the 1/4, but I'm just not that sure. I mean, if you remove 1000 pounds off the car, you'll only improve the 1/4 a second? I bet that if you remove 700 pounds from a 3rd gen Protege, to get it to about 2000 pounds, with the stock motor, the car will improve a lot more than a second in the 1/4 mile.


By the way, weight reduction will pay even more dividends on a road course, since not only does it improve power, but it improves braking and handling a lot.

100 pounds off a Protege is an easy .5-.75 seconds on a typical road course.

 

[GOTZOOM?]

One horsepower is the ability to move 33,000 lbs one foot in one minute.

You could break that down into other figures, just as long as it can be converted back to the above statement.

330 lbs in 100 feet in one minute

33 pounds 1000 feet in one minute

1000 pounds 33 feet in one minute

With this basic assumption, you can take the weight of your car, the horsepower of your car, and the length of the 1/4, and figure out how much weight you need to lose to go faster. I'll let you do that part.

 

[Joe PR5]

thats all super tech? Hummmm? Thanks for the imput tho...

 

[mazdaspeedpower]

You should take the horsepower at the wheels, shouldn't you when figuring that out for a more acurate reading, maybe I'm wrong, I don't know very much about this, it's just a suggestion.