Originally Posted by Atlanta93LE
(Post 241079)
A crush bent 3" will still only flow like a ~2.5".
mandrell bends FTW |
Originally Posted by y8s
(Post 241078)
if anyone cares...
crushing a 3" pipe by just a half inch results in a 7.7% loss in flow area. |
Originally Posted by hustler
(Post 241066)
looks like crushbent garbage to me.
as for 7% loss, who really cares for a 7% loss..... i like it, it was cheap :) |
I was running a 2.5" cherrybomb glasspack. Exactly the setup you are talking about, with the turndown before the diff. Loud, but sounded good. Not REALLY LOUD, just loud. I'm going back to a more conventional exhaust, and 3" now.
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I had a cherry bomb on my N/A 90 miata. It started out okay then becaming deafening...had to buy an ansa slip on for the time being. It was a 2.5'' i think.
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Originally Posted by cardriverx
(Post 240872)
Im thinking of doing a downpipe to a cherry bomb and then dump it before the diff. Im intrested in how they sound, they look very non restrictive and cheap!
I can't comment on the cherry bomb, but 27 dollars for a 3" ID FTW! |
The problem I had with my old setup was the drone. The actual exhaust was actually pretty awsome. That drone would make my brain vibrate, drove me CRAZY.
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1 Attachment(s)
DIY 3" exhaust with a straight through magnaflow and a downturn...track car only.
Would not do it on a daily driver...the sound inside the car would be annoying for daily driving. Outside of vehicle is not bad at all. |
Take a look at these chambered mufflers http://www.classicchambered.com/classic/faq.html , http://www.torquetechexh.com/mufflers.htm . They cost a little more, but are way more efficient and don't make as much vibration/drone as a CherryBomb. In highschool I had two of these on an 87' IROC. I put them inline behind the cat and removed the (HEAVY & INEFFICIENT) single in dual out muffler. This alone droped my ET by .11 at the strip. The sideffect was everybody thought it was actually a V-6 because of the single exhaust.... until they heard it runnin.
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When i do my exhaust in the coming weeks I am thinking of running a 2.5" downpipe expanding out to a 3" high-flow cat (which I already have), a 3" dynomax bullet, followed immediately by a supertrapp disc muffler terminating just ahead of the diff. Lets see how that works out.
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