makes sense. posted by fantomZ(OH) on December 14, 2005 at 08:11 PM
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so it would be your greatest point of restriction on the inlet side. Dropping from 2.5" to 2.25" just before the last leg of the inlet pipe makes for a better transition since going from 2.5" to 1.86" would likely create more turbulence than 2.25" to 1.86". There are just some things that you can't make perfect, so you just make it the best it can be (which philosophically would probably mean it is "perfect"). ;-)