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  1. #1

    Just wanted to run some numbers this morning and see.

    In a standard piston engine (an Otto or Diesel engine), displacement is calculated by multiplying the number of cylinders in the engine with the area of a piston and the length of the stroke. With circular pistons, displacement can be calculated from the bore diameter and stroke using the following formula:

    Pi/4 x Bore^2 x Stroke x the Number of Cylinders,

    Using my engine, a 3.24 Bore and a 5.0 Stroke:

    .7854 x 3.24^2 x 5.0 x 8= 329.79.

    Then to get liters you take 329.79ci and multiply it by .0163871 and that comes out to 5.404 L.

    So then if you really want to get crazy here is 1/4 mile ET and trap speed formulas. To get a "rough estimate" (this formula will be a little optimistic):

    ET = {[ (weight of car) / (max hp) ]^1/3} x 5.825

    To calculate the trap speed for the 1/4 mile, use this formula:

    mph = [ (max hp) / (weigh of car) ] 1/3 x 234


    And here is one more for shits and giggles.To calculate how much horsepower your car would have at a certain altitude, use this formula:

    hp loss = [ (elevation in feet) / 1000 ] x 0.03 x (hp at sea level)

    Oh yeah, and the maximum horsepower that manufacturers usually quote for their engines is at sea level.

  2. #2
    Senior Member 50 BMG's Avatar
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    OK...thanks for the textbook checkup.

    Now what does this have to do with you?

  3. #3
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    00 Atlantic Blue GT, Vortech Supercharged, 03 Cobra IRS, Griggs GR40 front suspension.
    11.66 @ 116 and 1.03 lateral g's

  4. #4
    Quote Originally Posted by 50 BMG
    OK...thanks for the textbook checkup.

    Now what does this have to do with you?
    Nothing I just woke up at 5 and had nothing better to do. :roll:

  5. #5
    Quote Originally Posted by bluepony
    http://www.wallaceracing.com/Calculators.htm
    Nice site!

  6. #6
    Senior Member 50 BMG's Avatar
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    Quote Originally Posted by Akuma
    Nothing I just woke up at 5 and had nothing better to do. :roll:
    Mabey you should get your car done then...

  7. #7
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    Sounds like some one is having with draws being with out a fast car! lol

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