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Post by jdl357 on Apr 28, 2015 15:46:48 GMT -5
Does anybody know what the tube coming off my exhaust before the expansion chamber is for?? Is is necessary or a restriction?
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Post by birdman on Apr 28, 2015 18:44:28 GMT -5
No one knows. Its just a bonus part I guess.
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Post by niz76 on Apr 28, 2015 22:07:45 GMT -5
I've seen that tube, but not usually on expansion chambers- usually stock exhausts... It's not necessary but the performance gain probably won't be noticed. Most folks (including myself) cut it off flush and weld/epoxy the hole shut.
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Post by moofus02 on Apr 28, 2015 23:09:48 GMT -5
Usually feeds air to the cat converter on a stock pipe
Sent from my SPH-L720 using proboards
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Post by birdman on Apr 29, 2015 1:48:36 GMT -5
See!!!... Bonus parts!
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Post by fe53series3 on Apr 29, 2015 8:08:50 GMT -5
Usually feeds air to the cat converter on a stock pipe Sent from my SPH-L720 using proboards Absolutely! The cat only works well at high temperatures, and by feeding air into the exhaust manifold, this raises the temperature of the exhaust gasses. The general view amongst the tuning community is that it adversely affects the performance of the exhaust frequency....... hence why you will very often see this pipe flattened and welded shut. The MX50 I bought was like this, and so too the FE53. |
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Post by jdl357 on Apr 29, 2015 9:19:42 GMT -5
Thanx for the info guys. Very helpful.
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Post by scooterpimp on May 5, 2015 18:11:31 GMT -5
Im still down with the tube being a cheap way to cleanup final tailpipe emissions to pass epa testing. . See that i had to put a twist in it!  |
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MustashMike
Scoot Member
Still alive & well
Posts: 89 
Location: Indianapolis
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Post by MustashMike on May 5, 2015 23:27:42 GMT -5
If you follow the steel tube it connects via a fiber hose to a reed valve that allows air in between exhaust pulses.
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Post by scooterpimp on May 6, 2015 16:21:47 GMT -5
Yup , i got the same setup on the keeway matrix i just picked up. Good ole wannabe exp. Chamber exaust.
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on May 23, 2015 0:50:42 GMT -5
Could be a reeCAT emissions system, I removed mine when I replaced the exhaust with a zx and blocked the opening in the airbox, didnt notice any difference apart from the sound a power gain from the zx
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MustashMike
Scoot Member
Still alive & well
Posts: 89
Location: Indianapolis
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Post by MustashMike on Jun 8, 2015 14:24:31 GMT -5
I had a bud weld shut the opening where the steel tube once lived. Got it very clean using a technique I learned from my Dad using coarse steel wool and 91% alcohol from CVS. Two coats of ceramic spray and installed it. Running SO good now. I want to remove it and go black stove paint as a top coat 'cause the seasoning of the ceramic was per the label. The color is yellow instead of orange in spots, but I certain it will make an excellent primer.
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