Quote:
Originally Posted by bullitt5897
A set 2.25 pipes merging to a single 2.5 pipe isnt a restriction? So 2 pipes with a 4 cross section each for a total of 8 of cross sectional flow merged to a single 2.5 pipe with a 5 cross sectional flow... what do you call that missing 3 of cross sectional flow? How about the 2 90* bends leading up to it?
Simple math points out to it being an issue. Compare it to a true 3 dual exhaust:
2 tubes with a cross section of 7 each for a combined 14 cross section compared to single 5cross section... hmmm I wonder which would be more free flowing?
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I had the same argument with my fabricator when I went from my Stillen exhaust to my FI exhaust. He had to custom fabricate the connection between FIs mid-pipe and the turbo 3 DP (single turbo). He kept wanting to neck the 3 down to a single 2.5 pipe and then branch back out to mate to the mid-pipe. Took me awhile to explain to him that he was fabricating a restriction into the system. Finally got him to custom fabricate a 3to2.5 Y, one 3 inlet and two 2.5 outlets.