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View Full Version : how to figure hp


jason69blair
09-17-2003, 08:34 PM
what is the calculation to figure out hp
wheeltrax
09-17-2003, 08:57 PM
a dyno :p
stupid driver
09-17-2003, 09:14 PM
i like the ole' seat of the pants method myself....



and if you need to change them pants after this, you know you have enough hp. :D
cals400ex
09-17-2003, 09:52 PM
i think chad502ex has a calculator on his website if i remember correctly. however, a dyno would probally be more accurate than a calculator.
JOEX
09-17-2003, 09:59 PM
Horspower Calculators (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=Horsepower+calculator&spell=1)
AndrewRRR
09-18-2003, 01:53 PM
You need to put it on a dyno. Even then things like tires and gearing can affect readings (if it's a chassis dyno, engine dynos are different). There are some programs like Desktop Dyno that can guess at your power output but the'll give u a ballpark figure at best.
nakomis0
09-18-2003, 03:46 PM
Heres my HP calculator... for 4 strokes...

every $100 you spend towards engine improvement gives you 1 HP.

So if you sink $1300 into your 4 stroke you get 13 HP...:huh

Its actually a pretty good system.

Thats parts only, labor costs dont count. There exceptions like, milling the cylinder and such but in general.