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      05-05-2012, 12:38 PM   #1
LucWerkz
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ISF Exhaust?

So I was able to test drive a stock ISF today and I noticed that once the car was moving at around 65-75 MPH the exhaust note changes and gets really deep and loud to point where I could feel it in my ears. I'm just wondering what makes this happen and I could get a similar effect with an M3.
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      05-05-2012, 01:18 PM   #2
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its the intake when you hit a certain rpm in the isf
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      05-05-2012, 10:55 PM   #3
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Quote:
Originally Posted by lthai
So I was able to test drive a stock ISF today and I noticed that once the car was moving at around 65-75 MPH the exhaust note changes and gets really deep and loud to point where I could feel it in my ears. I'm just wondering what makes this happen and I could get a similar effect with an M3.
That and the pipes in
The back are fake ....
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      05-06-2012, 01:47 PM   #4
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Quote:
Originally Posted by M3Denver View Post
That and the pipes in
The back are fake ....
You're an idiot.
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lol - seriously tho -- I find notes on my car sometimes -- but it's NEVER from girls -- -- damm M3 is a ghey magnet
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      05-07-2012, 07:17 AM   #5
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Originally Posted by eVitO
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Originally Posted by M3Denver View Post
That and the pipes in
The back are fake ....
You're an idiot.
Is it not true the dual tips are not real dual tips ? And a couple of the tips do not got the exhaust piping? Or did they fix this ?
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      05-07-2012, 03:31 PM   #6
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The IS-F still has two fake tips. Two of the tips are fake on my Dinan exhaust, who cares.

My guess for the boomy-ness of the IS-F exhaust is that the 8-speed in that car tends to upshift to high gears at lower than ideal speeds which puts you on the borderline of lugging the car.
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      05-08-2012, 02:32 AM   #7
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Quote:
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Is it not true the dual tips are not real dual tips ? And a couple of the tips do not got the exhaust piping? Or did they fix this ?
i think you mean the Dinan exhaust.

the Eisenmann tips are ALL functional. no fake or some shit in there.
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      05-08-2012, 02:33 AM   #8
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it's a rpm sensitive valvetronic system.
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      05-08-2012, 04:48 PM   #9
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Quote:
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it's a rpm sensitive valvetronic system.
Quote:
Originally Posted by brandonwuwux3 View Post
its the intake when you hit a certain rpm in the isf
Do you guys know of any aftermarket parts for the M3 that can do this?
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      05-09-2012, 07:36 PM   #10
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Originally Posted by lthai View Post
Do you guys know of any aftermarket parts for the M3 that can do this?
Innotech, Kreissieg, Evolve


Here are some videos of my IPE, all with the valves open....





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      05-09-2012, 07:46 PM   #11
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^^^ nice - I kept waiting for take off
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      05-09-2012, 09:20 PM   #12
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Two of the tips are fake on my Dinan exhaust
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      05-10-2012, 10:32 AM   #13
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Quote:
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i think you mean the Dinan exhaust.

the Eisenmann tips are ALL functional. no fake or some shit in there.
he's talking about the isf exhaust
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      05-10-2012, 01:10 PM   #14
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man would i love to take my car on a runway.
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