Exhaust diameter formula needed

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12-13-2007, 11:54 AM

KRRZ350

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Exhaust diameter formula needed

Real quick does anyone know the formula where X diameter pipe equals X & X diameter pipes & vice-versa?

TIA.

12-13-2007, 12:07 PM

Broaner

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A=PieR^2.

12-13-2007, 12:55 PM

The Wizard

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Quote:

Originally Posted by Broaner

A=PieR^2.

That's it. Simple math.

For the newbs, this means that a 4" exhaust pipe does not equate to two 2" exhaust pipes.

12-13-2007, 03:32 PM

SPiG

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Pipe Diameter* > Area in Inches Squared
2" > 3.141592654 ~= 3
2.25 > 3.976078202 ~= 4
2.5 > 4.908738521 ~= 5
3 > 7.068583471 ~= 7
4 > 12.56637061 ~= 12.5

*Assumes interior diameter, real life diameter of exhaust tubing is I believe measured exterior diameter. I made this in excel a while ago when I was bored, and I don't feel like making it again for true inner diameter.