X PIPE?

Air, fuel, and a spark, thats what makes every one of these Bavarian powerhouses churn at up to 7000RPM. Discuss all 1992-1999 BMW 3 series motors here. Including all M50, S50, M52, S52, M42, and M44 variants.

X PIPE?

Postby st3althbeam328i » Thu Jul 10, 2008 5:49 pm

So my question is, Is it worth it? I've never seen it done to a E36, but I hear you get more power out of it rather than a straight pipe (which is what I have right now). Any input would help thanks! :sharky
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Re: X PIPE?

Postby ali » Mon Jul 14, 2008 8:29 am

nothing that has a bend will ever increase power. You might see the power curve change a bit, but the straighter the exhaust, the more power...99.9% of the time.

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Re: X PIPE?

Postby st3althbeam328i » Mon Jul 14, 2008 6:29 pm

That's what I figured. I did my research after I posted this and came to find out that this is a better mod for the V8 applications than the I6. Thanks for the tip
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Re: X PIPE?

Postby wafi zarudin » Tue Jul 22, 2008 6:30 pm

x-pipes help alot when you have headers. or anything that has 2 banks. It helps equal out pressure.
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Re: X PIPE?

Postby st3althbeam328i » Tue Jul 22, 2008 6:56 pm

yeah I figured this out thanks for the help guys Its best when you have a V8 for the Xpipe for full funtionality
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Re: X PIPE?

Postby Volfinator » Mon Jul 28, 2008 6:21 pm

ali wrote:nothing that has a bend will ever increase power. You might see the power curve change a bit, but the straighter the exhaust, the more power...99.9% of the time.

-Ali



+1

That's why straight pipes are pretty common. Not zig zag pipes. :p
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Re: X PIPE?

Postby Leo_328i » Wed Aug 20, 2008 10:10 pm

A mate of mine with an E36 325i got an X Pipe put in his car and it made a pretty big improvement to how the car drove.

There was a significant increase in low end pull and the engine seemed a lot more free-reving.
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Re: X PIPE?

Postby st3althbeam328i » Thu Aug 21, 2008 3:45 pm

HMM This is what i've been hearing, but I wasn't sure if it would be a significant difference for the I6. I always hear of the V8 guys saying this is a great upgrade
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Re: X PIPE?

Postby fcvapor05 » Thu Aug 21, 2008 6:05 pm

Leo_328i wrote:A mate of mine with an E36 325i got an X Pipe put in his car and it made a pretty big improvement to how the car drove.

There was a significant increase in low end pull and the engine seemed a lot more free-reving.


You can't put an x-pipe on a I6.... on a v8, the headers are on opposite sides of the car, and the x-pipe connects them before the go out the back. BMW headers are on the same side of the car and are already connected. Theres nothing to x.
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Re: X PIPE?

Postby MIKEGTR » Thu Aug 21, 2008 6:22 pm

x-pipes are a means of equalizing the pressure on both sides of a V engines exhaust... in a mustang u usually wanna do it as close to the front as physically possible... the only reason that they use x pipes more often than just a straight tube connecting the two pipes (H pipe, if u will) is because the angle at which the flow enters and exits the flow produces less head loss.

not necessary in an inline engine for most applications...

in the mustang i used to have the pipes were not the same length at both sides i dunno how but one came up a couple of inches shorter than the other... the x pipes provide the same (theoretically) physical conditions for the flow out of both banks on the engine

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Re: X PIPE?

Postby Leo_328i » Fri Aug 22, 2008 5:41 am

Sorry I was refering to this...

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Its probably better to call it an X-Merge
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Re: X PIPE?

Postby MIKEGTR » Fri Aug 22, 2008 8:00 am

that is an x pipe


u don't need it
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Re: X PIPE?

Postby loonibab///m3 » Fri Aug 22, 2008 10:14 am

I think xpipes rae good for big motors like v8s and up.. but on a 6 banger I wouldn't worry about messing with an xpipe, straight pipes ftw.

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Re: X PIPE?

Postby fcvapor05 » Fri Aug 22, 2008 11:18 am

Leo_328i wrote:Sorry I was refering to this...

Image

Its probably better to call it an X-Merge


that is an x-pipe. Like Mike said, you don't need it... it isn't going to help you make power.
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Re: X PIPE?

Postby Volfinator » Mon Aug 25, 2008 9:16 pm

Waste of money
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