21/2 exhaust question

sharptech · 01-18-2008, 06:19 PM

my exhaust is a 2 1/2 inch pipe mandrel, cut and weld looks just like a t1r single (with test pipe). Now of coarse I don't have a t1r muffler so I used a apexi n1 muffler at the back and an 18" long 3" glasspak in the middle in an attempt to quite it down. Now the type of glasspak used is a louvered style not baffled and that is why it's a 3" and not 2 1/2". However I think that louvered style might still be causing enough turbulance to cost hp. What do you guys think?

MarkZ28 · 01-19-2008, 04:31 AM

AS long as the inside diameter is not smaller than the rest of the pipe and theres nothing hanging down in the flow it wouldnt cost power. I think Magnaflow use a similar type design with perforated straight pipe through their oval muffler with packing around it to kill the noise and they do well.

01-18-2008, 06:19 PM	#1 (permalink)
sharptech Junior Member Join Date: Jan 2008 Posts: 8	21/2 exhaust question my exhaust is a 2 1/2 inch pipe mandrel, cut and weld looks just like a t1r single (with test pipe). Now of coarse I don't have a t1r muffler so I used a apexi n1 muffler at the back and an 18" long 3" glasspak in the middle in an attempt to quite it down. Now the type of glasspak used is a louvered style not baffled and that is why it's a 3" and not 2 1/2". However I think that louvered style might still be causing enough turbulance to cost hp. What do you guys think?

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01-19-2008, 04:31 AM	#2 (permalink)
MarkZ28 Senior Member Join Date: Oct 2007 Posts: 123	AS long as the inside diameter is not smaller than the rest of the pipe and theres nothing hanging down in the flow it wouldnt cost power. I think Magnaflow use a similar type design with perforated straight pipe through their oval muffler with packing around it to kill the noise and they do well.