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 Re: Exhaust manifold bypass.....something a little different maybe
[Re: krb90]
#930891
02/13/09 12:05 AM
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Joined: Jan 2001
Posts: 11,595
Forum Moderator
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its been discussed a few times before here. one guy did it and then went back to stock.
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Re: Exhaust manifold bypass.....something a little different maybe
[Re: krb90]
#930892
02/13/09 09:26 AM
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Joined: Apr 2002
Posts: 3,568
Roll Me Over
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It should help reduce the heat issue with 1-5 dumping into to 6 before exiting, though I don't think you will get much in the way of performance gains, then again it didn't cost you $700 either <img src="/forums/images/graemlins/smile.gif" alt="" />
As mentioned on yotatech, you will want to reinforce the "Y". I would weld some 2" bands across the "Y" on each side, and then maybe weld in a piece of tube between the two down pipes.
More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed
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Re: Exhaust manifold bypass.....something a little different maybe
[Re: krb90]
#930893
02/13/09 04:05 PM
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Joined: Jan 2001
Posts: 11,595
Forum Moderator
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http://www.4x4wire.com/forums/showf...B11&Number=908679&Forum=,,,,,,,f11 http://www.4x4wire.com/forums/showf...B11&Number=910876&Forum=,,,,,,,f11 http://www.4x4wire.com/forums/showf...11&Number=1051347&Forum=,,f11 http://www.4x4wire.com/forums/showf...11&Number=1119477&Forum=,f11 http://www.4x4wire.com/forums/showf...11&Number=1120761&Forum=,f11
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Re: Exhaust manifold bypass.....something a little different maybe
[Re: Adam F]
#930894
02/13/09 06:02 PM
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Joined: Aug 2005
Posts: 58
OP
Getting the Wheeling Fever
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I remember reading a thread about the guy who did something like a "Y" pipe, using stock manifolds and he didn't like it and went back to stock....i couldn't find that particular thread. I can't remember why or what it was that he didn't like. About all the others that did some kind of re-route seemed to like it though.
I'm kinda like the guy in the first thread you referenced, in that i'm not necessarily looking for hp, although if it happens, then great. #6 valve was burnt, so this should take care of that. And it HAS to flow better...we'll see what happens.
I also made an insert for the main pipe coming off the driver side manifold. It basically reduces the inside pipe diameter to 1 1/2" between the flange and the "Y" so that both exhaust banks are "balanced"...or at least kinda close. It's been demonstrated many times that too big a pipe decreases performance, however the physics work. So hopefully this will help.
It's a free vehicle, so I really don't have anything to lose.....
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