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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 02-09-2006, 08:57 AM   #1 (permalink)
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header power gains?

Anybody know what kind of gains you can expect from a header upgrade? This is assuming the setup listed below in my sig.
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Old 02-09-2006, 12:14 PM   #2 (permalink)
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not sure, what headers are you looking at? most places that advertise headers also advertise the header gains.
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Old 02-09-2006, 01:21 PM   #3 (permalink)
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ur looking at from 3-7 hp max gain...
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Old 02-09-2006, 01:57 PM   #4 (permalink)
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that's it? 3 -7 hp?

r u sure!?!
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Old 02-09-2006, 02:03 PM   #5 (permalink)
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Yep, it's not that much. I saw once some dyno tests with and without the upgraded header but like Speed says you will only gain a few hp......
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Old 02-09-2006, 02:14 PM   #6 (permalink)
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u'll get a nice sound though
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Old 02-09-2006, 04:12 PM   #7 (permalink)
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thats one thing that BMW did when they made the e36.. is a restrictive exhaust system... includeing the headers...

as many are saying, 3-7 hp... plus another 5-10 with the cat back... your looking at a total of around 15 hp...
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Old 02-12-2006, 06:12 AM   #8 (permalink)
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so even if i just change my headers and retain my old stock exhaust, it can give me that 3 - 7 hp gain? and will it give an aggressive sound?

e36 316i does not have oxygen sensors right? if im not mistaken, m43 engine? so there should be no complications with changing them to headers without sensors?

btw, if ever, wat design should improve my acceleration? 4-2-1 or 4-1 headers?
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Old 02-12-2006, 10:45 AM   #9 (permalink)
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for noticeable power gains you should have a V8 car like a Mustang, cars like the Bimmer and ricers don't gain much even with upgrades.
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Old 02-12-2006, 01:49 PM   #10 (permalink)
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Quote:
Originally Posted by BImmerN2B
for noticeable power gains you should have a V8 car like a Mustang, cars like the Bimmer and ricers don't gain much even with upgrades.
not nec. tru...go FI, every mod will give u lots of HP
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Old 02-12-2006, 04:03 PM   #11 (permalink)
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Vinnie got 18hp max added to his 328i

He installed a full M3 exhaust with euro M3 headers.

That thing is madness :O:O even without the M50 intake.

I ordered the M3 exhaust too.

Sound will be a bit less but much deeper

And the power gains are very good
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Old 02-12-2006, 10:17 PM   #12 (permalink)
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Quote:
Originally Posted by frank de jonge
Vinnie got 18hp max added to his 328i

He installed a full M3 exhaust with euro M3 headers.

That thing is madness :O:O even without the M50 intake.

I ordered the M3 exhaust too.

Sound will be a bit less but much deeper

And the power gains are very good
can you post the dyno numbers? im always interested in checking out mods numbers when people dyno their car. also do you mean 18 hp? or 18rwhp?


speaking of rwhp (rear wheel horse power) most header companies only post or claim their crank hp not their wheel horsepower.
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Old 02-13-2006, 01:34 AM   #13 (permalink)
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Quote:
Originally Posted by frank de jonge
Vinnie got 18hp max added to his 328i

He installed a full M3 exhaust with euro M3 headers.

That thing is madness :O:O even without the M50 intake.

I ordered the M3 exhaust too.

Sound will be a bit less but much deeper

And the power gains are very good
u forgot to mention his whole system starting from the exhaust manifold all the way to the muffler is off of a euro m3...
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Old 02-13-2006, 02:25 AM   #14 (permalink)
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Quote:
Originally Posted by Cruzin 323is
thats one thing that BMW did when they made the e36.. is a restrictive exhaust system... includeing the headers...

as many are saying, 3-7 hp... plus another 5-10 with the cat back... your looking at a total of around 15 hp...
No catback will give you more than maybe, MAYBE a 5.x whp gain.
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Old 02-13-2006, 03:35 AM   #15 (permalink)
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I don't have dyno's, a dyno run costs 60 dollars over here... so no :P

I thought Frank knows a link somewhere on BMW Syndikat.

But yes, it's a very nice mod.
@speedinfusion: Frank said a full M3 exhaust with M3 headers



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