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round vs square exaust?

post #1 of 4
Thread Starter 
I am currently building a custom reverse flow, cc is 36" x 24" x 24" , fb is 24" x 18" x 18" , question is 4" x 30 in stack or should I go square? If I go square what diameter and length? Help and info is appreciated. Thanks
post #2 of 4
Thread Starter 
post #3 of 4

Your numbers are good for the 4" round. http://feldoncentral.com/bbqcalculator.html?cc=36,51,0,0,0,0,51885.36,17295.12&fb=32,24,24,0,0,18432.00,17295.12,106.6&ch=6,921.60,32.61&fi=6,2,0,55.30,4.61&fc=13.71,19.38,147.46. I didn't run the numbers for square. You can plug the numbers in the calculator and adjust from their.

Happy smoken.

David

post #4 of 4
Add to the "diameter" of the square if you use it.... The additional surface area will cause additional friction...
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