Quote:
Originally Posted by Wolf539
I actually work for a living, so I'm not going to spend any more time trying to research something for you. But don't twist the facts; the M3 was an exhaust, no "tune". For all you know, the HP gains made on my 4.4i may be similar, or more. You're offering absolutely nothing but hot air to support your position. Until YOU come up with a dyno that shows a 4.4i X5 making zero gains with an Eisenmann race exhaust I think we're wasting our time.
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Haha I work as well, welcome to the club! But this forum is very nice and sends an email to every single thread I post in that has an update.
I have some personal experience from friends, myself and the m3forum on exhaust (muffler, section 3) upgrades and dyno time. But also tons and tons of information from reading on m3forum the last 4 years.
here are some good threads with real world data, before and after. These threads made me a believer to these products:
Dyno: EPIC tune vs. Stock tune - BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3)
Bimmerworld/Epic Race Tune review - BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3)
Bimmerworld 3.5" race exhaust - BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3)
During this event, my friend preeth made similiar numbers to how his car is now (stock) muffler, when he had this dyno his car had full exhaust (rogue engineering) so the muffler itself did nothing but sound.
The bimmerworld race exhaust on the other hand claims 10-15 hp. but people have been getting 20-25 and even more.
Dyno Meet Weekend of Jan 25-27, 2008 - Page 5 - BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3)
So with real numbers like these, then I can say the exhaust did something extra besides sound.
ALSO make sure you are buying eisenman, not eisen haus. The imitation chinese brand that no one can even tell anymore, not even vendors!