Akuma
12-16-05, 06:27 AM
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.
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.