3" ypipe to 4" merge
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3" ypipe to 4" merge Anyone have 3" ypipe merged to a 4"ipipe over the axle to a muffler? If so, can you please post pics/reviews? Im going to do this pretty soon and want to get an idea on the best setup for clearance/ sound.
thanks!
thanks!
my tsp ypipe looks like it ends in a 3 1/2'' merge( not 100% sure) then goes down to 3'' inlet. looks like all you have to do is chop the piece that minimizes the pipe. plus its a great merge!...i think othe then that you will need to get it custom made ypipe to fit a muflex 4inch catback.
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pretty soon here i am goin to be taking my TSP o/r y and doing the flowmaster 3"/4" merge with a 4" i-pipe run as far back as possible into a 3" spintech cat back. i haven't really found too much on the 3" spintech but it looks pretty legit, all 3" piping and has a real deep tone. so hopefully this will kill the rasp, fingers crossed.
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read post #9
i would love to go with the mufflex 4" cat back but damn they are expensive
read post #9
i would love to go with the mufflex 4" cat back but damn they are expensive
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What Im gonna do is get a flowmaster 4" merge and a magnaflow muffler with singe 4" inlet with dual 3" outlets. To reduce turbulence in your exhaust you want to keep the same cross-sectional area throughout the exhaust system. going from 2 3" pipes into a single 4" pipe will reduce the turbulence.
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I run a 3" mandrel bent Y with a 3" Flowmaster merge that is 4" outlet and necked down to a 3" I pipe, 3" electric cut out. 3" over axle into a Magnaflow muffler and 3" mandrel tailpipes. I pick up right at 10 with the cut out open.
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u pick up 10hp with the cut out open? see thats why i really want a mufflex 4" cat back. i dont want a cut out, and i want to be able to get as much flow as possible out of a cat back. i guess i'll be saving up.
when my builds done im gonna be cutting my old tsp y pipe and putting in a 3" to 4" flowmaster merge into a dynatech 4" race muffler and 4" turn down before the axle. i wont know how it will fit till i get the motor back in but i know its gonna be tight bc my car sits pretty damn low.
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^ a tip for the turndown, take a grinder and shave off the bottom edge of turndown. that way if you scrape it wont bend up/smash that part of the pipe. i ran into that problem with the turn downs on my TD's. but a big set of pliers and grinder fixed it.
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https://ls1tech.com/forums/generatio...heads-cam.html
read post #9
i would love to go with the mufflex 4" cat back but damn they are expensive
read post #9
i would love to go with the mufflex 4" cat back but damn they are expensive
a Dr. Gas Exhaust.
http://drgas.mybisi.com/products/street-performance
Honestly, I bet you'd still pick up 10 with a cut out, even with the Mufflex system. I've installed a few, they aren't any better flowing than a magnaflow IMO.
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not that i doubt your experience, but a 4" cb > 3" cb. it has to be, just like a 4" merge > 3" merge. it's the same concept.
^and thats where the problem lies, it's your opinion and not based on actual testing or actual hp/tq/cfm #'s.
now i would love to see a dyno comparison between 3" y-pipe with 3" merge and a 3" cb with 2.5" tails vs. a 3" y-pipe with a 4" merge with a true 3" cb vs. a 3" y-pipe with a 4" inch merge with a 4" cb with 3.5" tails.
now i would love to see a dyno comparison between 3" y-pipe with 3" merge and a 3" cb with 2.5" tails vs. a 3" y-pipe with a 4" merge with a true 3" cb vs. a 3" y-pipe with a 4" inch merge with a 4" cb with 3.5" tails.
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I would say turbulence is higher pitched at faster velocity (speed). So it would depend on what sound you prefer, deep or high. I currently have tsp true duals on my car and would say its a little raspy. Just think of the true duals xpipe merge and a y pipe merge. the flow in the TD's stays parallel and the streamlines of the flow do not collide at as big of an angle as the ypipe streamlines.
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not that i doubt your experience, but a 4" cb > 3" cb. it has to be, just like a 4" merge > 3" merge. it's the same concept.
^and thats where the problem lies, it's your opinion and not based on actual testing or actual hp/tq/cfm #'s.
now i would love to see a dyno comparison between 3" y-pipe with 3" merge and a 3" cb with 2.5" tails vs. a 3" y-pipe with a 4" merge with a true 3" cb vs. a 3" y-pipe with a 4" inch merge with a 4" cb with 3.5" tails.
^and thats where the problem lies, it's your opinion and not based on actual testing or actual hp/tq/cfm #'s.
now i would love to see a dyno comparison between 3" y-pipe with 3" merge and a 3" cb with 2.5" tails vs. a 3" y-pipe with a 4" merge with a true 3" cb vs. a 3" y-pipe with a 4" inch merge with a 4" cb with 3.5" tails.
I agree with you Brian, you basically want to get the exhaust out as fast as possible without too much resistance.
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From: Texas/Afghanistan
I would say turbulence is higher pitched at faster velocity (speed). So it would depend on what sound you prefer, deep or high. I currently have tsp true duals on my car and would say its a little raspy. Just think of the true duals xpipe merge and a y pipe merge. the flow in the TD's stays parallel and the streamlines of the flow do not collide at as big of an angle as the ypipe streamlines.
IMHO Larger pipe sounds like ****.
And sometimes a 4" pipe will flow worse then a 3" pipe. Heat, volume, air speed, turbulence it is all effected.