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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Pipe Sizing please read

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Old Aug 1, 2007 | 11:20 PM
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Pipe Sizing please read

I know, doesnt belong here, but since i need this quick and seeing how more people come here than the exaust forum, i decided to post here, anyways, Does anybody know how you convert the diamiter of your piping to determine the radius, like how big of diameter would i have for 2-1/4 or 2-1/2, if you reading this just had a new exaust put on and you know its a new 2-1/4 or 1/2 will you go measure it and get back as soon as possible, im trying to get some turndowns on my truck right after mufflers, but i dont know what size i need to get?
 
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Old Aug 1, 2007 | 11:40 PM
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2 1/4 or 2 1/2 is your diameter, for exhaust it's typically outside diameter.

If you divide it by two you'll get the radius, but it's kinda pointless in exhaust sizing.

Justin
 
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Old Aug 2, 2007 | 12:32 AM
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is that all, i thought it was a bunch of digits and such, my bad, didnt mean to start a thread for nutting
 
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Old Aug 2, 2007 | 04:11 AM
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How about a conversion from circumference to diameter?
 
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Old Aug 2, 2007 | 08:51 AM
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For exhaust pipe diameters, just divide the circumference by 3 (pi). Pi is a much longer number than that (3.14159....) but you really don't need all the significant digits for this one.
 
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