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Straight Pipe

E28 technical advice asked and given! Troubleshooting, modifications and more.
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marshalljh93
Posts: 8
Joined: Aug 16, 2010 3:37 PM
Location: Washington

Straight Pipe

Post by marshalljh93 »

Would it be a good idea to straight pipe my 528e? I want a more aggressive sound, but have no funds at the moment. I don't get tested for emissions where I live so I am clear there. The only question I have is does the engine need back pressure to run correctly? Or would it run better straight piped?
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C.R. Krieger
Posts: 14507
Joined: Feb 12, 2006 12:00 PM
Location: Halfway up the left side of Lake Michigan
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Post by C.R. Krieger »

No.
Yes.
No.
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Kyle in NO
Posts: 17638
Joined: Feb 12, 2006 12:00 PM
Location: Nasty Orleans------> Batten-Rooehjch------>More Souther LA

Post by Kyle in NO »

I want a more aggressive sound, but have no funds at the moment.
Then why the hell are you contemplating it?

You stand to gain nothing from this. You should install a freer flowing muffler if you want more sound.
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Shadow
Posts: 951
Joined: Dec 28, 2008 10:03 PM
Location: USA

Post by Shadow »

It's not a good idea.
No your car does not need back pressure to run correctly.
No it would not run better straight piped.
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wkohler
Posts: 50928
Joined: Oct 05, 2006 11:04 PM
Location: Phönix, Arizona, USA
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Post by wkohler »

Do it. It will be awesome.
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derrith
Posts: 2980
Joined: Sep 18, 2007 1:02 AM
Location: Bay Area, CA

Post by derrith »

wkohler wrote:Do it. It will be awesome.
Your car will make a ton more power once you get rid of the restrictive exhaust. You'll be able to keep up with m5s.
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Ultrascan9999
Posts: 9
Joined: Nov 09, 2010 11:44 PM
Location: Dallas, TX

Do it. Unbelievable power gain!!!

Post by Ultrascan9999 »

Took out everything . Now one larger pipe runs from the engine out to the muffler (magnaflow) and out the middle like before but with a thick chrome tip. The E28 Looks great, sounds great, engine runs cooler, and when you press the accelerator pedal and take off you can scrach through third. However you can forget about that state inspection, that is if your state has that. Cost $160. Result Priceless!!!!

88 535IS

White 5 speed :evil:
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foamy
Posts: 1527
Joined: May 29, 2007 6:39 PM
Location: North Branford Connecticut

Post by foamy »

derrith wrote:
wkohler wrote:Do it. It will be awesome.
Your car will make a ton more power once you get rid of the restrictive exhaust. You'll be able to keep up with m5s.
im not so sure of that.when my exaust fell off it just got loud there was no extra power.
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marshalljh93
Posts: 8
Joined: Aug 16, 2010 3:37 PM
Location: Washington

Post by marshalljh93 »

Thanks for the input, I was just unsure about the benefits, if there were any, to straight piping it. Looks like I will just have to save my money.
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TSMacNeil
Posts: 7014
Joined: Jan 22, 2009 5:37 PM
Location: Phoenix, Arizona

Post by TSMacNeil »

foamy wrote:
derrith wrote:
wkohler wrote:Do it. It will be awesome.
Your car will make a ton more power once you get rid of the restrictive exhaust. You'll be able to keep up with m5s.
im not so sure of that.when my exaust fell off it just got loud there was no extra power.
:laugh:

You mean..
louder does not mean mo powa?......
:shock:
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slammin_e28
Posts: 6135
Joined: Aug 05, 2007 4:57 PM
Location: 24477

Post by slammin_e28 »

Backpressure..... :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :rofl: :facepalm: :hysterical: :hysterical: :hysterical: :deadhorse:
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south26
Posts: 6343
Joined: Jul 13, 2008 2:16 PM
Location: Kettering, OH

Post by south26 »

I ran my 528e with a straight pipe for a while and I hated the sound. The reason I did it was because one day my cat fell in two (no not the furry kind), I happen to have a 533i that had a straight pipe so I took it off and stuck it on my car until I bought another cat (the metal kind) I was much happier once I had the car back on.

Andy
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