Eisenmann performance question

///Matt · 09-04-2006, 11:12 AM

Hi guys..

So the other day, I put an OEM ZHP muffler on my friends NON-ZHP 2001 330ci. The ZHP (or "performance packace) muffler does NOT have an exhaust flap at the very rear, like most other BMWs.

When I replaced his existing exhaust with this more "free flowing" version.....

The car lost a LOT of torque feel off the line... I mean MASSIVE drop. There's no WAY the tires are ever going to break loose on this now.
Gained a little power over stock above 4000 rpm.
(these are FEEL based, NO DYNO.)

Car has a deeper, slightly louder exhaust note, but not very aggressive, sort of just a hum.

To ME, this proves that the exhaust flap is designed to improve low end torque.

This being the case....

What have you all felt when installing the flap-less Eisenmann mufflers?
I'm VERY interested in knowing right away, as I intended to obtain an Eisenmann pretty soon, but may be changing my mind.

Matt

///Matt · 09-18-2006, 03:30 AM

Nobody has a response?

09-04-2006, 11:12 AM	#1
///Matt United States Marine 318 Rep 2,748 Posts Drives: 2007 Dodge Ram 1500 Join Date: Jul 2006 Location: Los Angeles iTrader: (8) Garage List 2006 330i [0.00]	Eisenmann performance question Hi guys.. So the other day, I put an OEM ZHP muffler on my friends NON-ZHP 2001 330ci. The ZHP (or "performance packace) muffler does NOT have an exhaust flap at the very rear, like most other BMWs. When I replaced his existing exhaust with this more "free flowing" version..... The car lost a LOT of torque feel off the line... I mean MASSIVE drop. There's no WAY the tires are ever going to break loose on this now. Gained a little power over stock above 4000 rpm. (these are FEEL based, NO DYNO.) Car has a deeper, slightly louder exhaust note, but not very aggressive, sort of just a hum. To ME, this proves that the exhaust flap is designed to improve low end torque. This being the case.... What have you all felt when installing the flap-less Eisenmann mufflers? I'm VERY interested in knowing right away, as I intended to obtain an Eisenmann pretty soon, but may be changing my mind. Matt
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09-18-2006, 03:30 AM	#2
///Matt United States Marine 318 Rep 2,748 Posts Drives: 2007 Dodge Ram 1500 Join Date: Jul 2006 Location: Los Angeles iTrader: (8) Garage List 2006 330i [0.00]	Nobody has a response?
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