328i M peformance exhaust hp gains? - BMW 3-Series Forum (F30 / F32)

momo3605 · 03-14-2013, 12:15 AM

Since active autowerke claims 9hp/13tq, does that mean that power can be gained from the M performance exhaust as well?

momo3605 · 03-14-2013, 12:17 AM

Since they are both axlebacks...

pkim1079 · 03-14-2013, 12:52 AM

Quote:

Originally Posted by momo3605

Since they are both axlebacks...

Axle backs are worthless imho. Get something for a decent price which is downpipe back. Do these cars have the cats in the middle of the downpipe as well?

David328M-Sport · 03-14-2013, 01:10 AM

Quote:

Originally Posted by momo3605

Since active autowerke claims 9hp/13tq, does that mean that power can be gained from the M performance exhaust as well?

No. Just a leaner, meaner G R O W L.
More meaner than leaner.
Ok, so it's not even leaner.
At all.

Jamesons Viggen · 03-14-2013, 03:06 AM

I saw 7whp 20ft lbs with a catback. That was likely mostly muffler. I would say the MP units likely give little hp, within variance in dyno runs, say 2-3whp.

zibawal · 03-14-2013, 08:54 PM

Quote:

Originally Posted by Jamesons Viggen

I saw 7whp 20ft lbs with a catback. That was likely mostly muffler. I would say the MP units likely give little hp, within variance in dyno runs, say 2-3whp.

Sounds realistic!

JOHN328 · 03-26-2013, 09:35 PM

I've just installed my m performance exhaust for my 328i.
Although I don't think there's any said hp gain but I can feel a little more power from it and the turbo sounds a bit louder too. Must be from the better air flow.
So far I'm loving the exhaust, a little bit louder would suit me more, so by time when I get my bms and dp that should sort out all my problems.
Cheers

overkill1125 · 03-26-2013, 10:17 PM

Is there a resonator on the 328? I see a can near the middle and not sure if that is the resonator or cats?

stormtrooper328i · 03-26-2013, 11:50 PM

Quote:

Originally Posted by overkill1125

Is there a resonator on the 328? I see a can near the middle and not sure if that is the resonator or cats?

Yes that center can in the exhaust is a resonator.

overkill1125 · 03-27-2013, 06:34 PM

Quote:

Originally Posted by stormtrooper328i

Yes that center can in the exhaust is a resonator.

So did anyone removed it like most do it on the e90?
Surprised that the BMW Perf Exhaust does not remove it on the F30 but it does on the e90

03-14-2013, 12:15 AM	#1
momo3605 Private First Class Drives: 328i M Sport Join Date: Aug 2012 Location: Norcal Posts: 186 iTrader: (0)	328i M peformance exhaust hp gains? Since active autowerke claims 9hp/13tq, does that mean that power can be gained from the M performance exhaust as well?
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03-14-2013, 03:06 AM	#5
Jamesons Viggen Lieutenant Colonel Drives: '98 M Roadster stg 2 S/C Join Date: Jul 2012 Location: New Jersey Posts: 1,822 iTrader: (1)	I saw 7whp 20ft lbs with a catback. That was likely mostly muffler. I would say the MP units likely give little hp, within variance in dyno runs, say 2-3whp. __________________ '98 M Roadster stg 2+ S/C @ 13psi +'13 EBII M Sport 328i 6mt BMS stg 1+

03-26-2013, 09:35 PM	#7
JOHN328 Feeling horny Drives: BMW F30 328 Join Date: Sep 2012 Location: Melbourne VIC Posts: 108 iTrader: (0)	I've just installed my m performance exhaust for my 328i. Although I don't think there's any said hp gain but I can feel a little more power from it and the turbo sounds a bit louder too. Must be from the better air flow. So far I'm loving the exhaust, a little bit louder would suit me more, so by time when I get my bms and dp that should sort out all my problems. Cheers __________________ BMW F30 328i Sport Line

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03-14-2013, 12:17 AM	#2
momo3605 Private First Class Drives: 328i M Sport Join Date: Aug 2012 Location: Norcal Posts: 186 iTrader: (0)	Since they are both axlebacks...

03-26-2013, 10:17 PM	#8
overkill1125 Lieutenant Drives: 2013 328i xdrive Join Date: Jan 2010 Location: Montreal, Canada Posts: 530 iTrader: (4)	Is there a resonator on the 328? I see a can near the middle and not sure if that is the resonator or cats?