|
|
|
|
| Author |
|
|
EMT/TechRescue Instructor
Join Date: Mar 2007
Location: Moncks Corner, SC
Posts: 342
|
New M&K premuffler
I got my premuffler the other day and put it on the same day. That thing looks awesome. If Ben (mb911) tells you he has a part that is dinged... BUY IT!
Thanks Ben! I noticed that my idle dropped off to about 750 RPM from around 875. I also noticed that it pops (almost like a faint backfire from the exhaust). It happens when I excellerate after shifting gears while driving aggressive. I plan on having the CO2 levels adjusted and readjust the idle. I am hoping this will clear it up. Just alittle background, I recently pulled the intake and replaced all intake gaskets and questionable vacuum hoses. It ran sweet after that. The best I have seen it run since I bought it.
__________________
David 1986 Iris blue 911 Cabriolet 2017 Ram 1500 Night edition 2025 BMW X-5 |
||
03-18-2009, 12:55 PM
|
|
|
Member 911 Anonymous
|
Slight Back Fire is the side effects of a CBP or PreMuff. It can be tuned out but think of it as a race car sound
 Definitely check your AFR and reset your base idle to 880.
__________________
'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
||
|
03-18-2009, 03:51 PM
|
|
|
Registered
Join Date: Jan 2009
Location: Norcross, GA
Posts: 627
|
I too get a very slight backfire - I like it
__________________
'85 RoW 911 Coupe '65 356 SC '72 BMW 2002Tii '10 Cayenne '20 Ram Longhorn |
||
|
03-18-2009, 03:57 PM
|
|
|
Registered
Join Date: Jan 2009
Location: Australia
Posts: 135
|
any pics??? did it make any difference to the noise?? performance increase?
|
||
|
03-18-2009, 03:58 PM
|
|
|
EMT/TechRescue Instructor
Join Date: Mar 2007
Location: Moncks Corner, SC
Posts: 342
|
I dont have any pic's right now.
I dont think it is any louder than before, maybe alittle throaty. A lower pitch tone. I will probably notice a difference once the AFM is adjusted right.
__________________
David 1986 Iris blue 911 Cabriolet 2017 Ram 1500 Night edition 2025 BMW X-5 |
||
|
03-18-2009, 07:19 PM
|
|
|
Registered
Join Date: May 2003
Location: Canada
Posts: 501
|
I also noticed a slight backfiring on deceleration after fabspeed premuffler install. But like others have mentioned I kind of like the "boy racer" sound.
__________________
1987 Carrera, Venetian Blue. |
||
|
03-19-2009, 01:36 PM
|
|
|
|
more PM's than Posts
|
My 3.2 does a good amount of backfiring at idle with the cat bypass and a M&k 1-1. People often ask me why thats happening but I assure them its a good thing lol
|
||
|
03-19-2009, 04:25 PM
|
|
|
Registered
|
glad it worked out well for you
__________________
Ben 89 944,85.5 944 914-6 2.4s GT tribute. 914-6werkshop.com |
||
|
03-22-2009, 04:31 PM
|
|
Marble Grey
1984 Porsche 911 Carrera
2002 GMC Sierra Denali
