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  #1  
Old 05-08-2003, 02:53 PM
GregW in Oregon GregW in Oregon is offline
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Preliminary Racing Dynamics E46 M3 catalog

Just received this from Federico Pavoncelli of RD Sport (distributors of Racing Dynamics S.p.A. in the US). It's preliminary (not all part nos. there, etc.), but shows a lot of new product including X-Flow downpipe, CAI, sport suspension, sway bars, springs, strut braces, etc. You can print it out on 11 x 17 (double page format). Enjoy!

Preliminary Racing Dynamics E46 M3 parts catalog
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2008 M3 Coupe - Alpine/Fox Red/Carbon
2015 M4 Coupe - SS/SO - 7/14 delivery
2012 M-B ML350 - Arctic/Black/Satin Ash
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  #2  
Old 05-09-2003, 09:43 AM
JPinTO JPinTO is offline
2001 M3:Stick, what else?
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Any info on that Downpipe? Is this a known area of inefficiency in the M3 breathing?
  #3  
Old 05-09-2003, 05:23 PM
GregW in Oregon GregW in Oregon is offline
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Racing Dynamics downpipe

Quote:
Originally posted by JPinTO
Any info on that Downpipe? Is this a known area of inefficiency in the M3 breathing?
I only know what the catalog says, which is, "Most owners dislike the 'sewing machine' noise coming from the exhaust pipe. Pir stainless steel X-Flow Dowpipe greatly reduces this noise, but most important, increase performance by increasing the scavenging effect of the exhaust."

Sounds similar to the one Tubi is working on.
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2008 M3 Coupe - Alpine/Fox Red/Carbon
2015 M4 Coupe - SS/SO - 7/14 delivery
2012 M-B ML350 - Arctic/Black/Satin Ash
  #4  
Old 05-09-2003, 05:44 PM
Akakubi Akakubi is offline
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Re: Preliminary Racing Dynamics E46 M3 catalog

Quote:
Originally posted by GregW in Oregon
Just received this from Federico Pavoncelli of RD Sport (distributors of Racing Dynamics S.p.A. in the US). It's preliminary (not all part nos. there, etc.), but shows a lot of new product including X-Flow downpipe, CAI, sport suspension, sway bars, springs, strut braces, etc. You can print it out on 11 x 17 (double page format). Enjoy!

Preliminary Racing Dynamics E46 M3 parts catalog
The parts are on the way from Germany now. They should be available by the end of this month.
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  #5  
Old 05-12-2003, 07:50 AM
JPinTO JPinTO is offline
2001 M3:Stick, what else?
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Is the "sewing machine sound" really due to the exhaust?? If so, then the exhaust is the place to focus on.

All I know is that the downpipe made a big difference in the performance of my 91 Talon AWD... moreso than any single other breathing mod except the intercooler pipe.
  #6  
Old 05-12-2003, 08:08 AM
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Mr. The Edge Mr. The Edge is offline
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Quote:
Originally posted by JPinTO
Is the "sewing machine sound" really due to the exhaust?? If so, then the exhaust is the place to focus on.
no
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  #7  
Old 05-12-2003, 09:30 AM
JPinTO JPinTO is offline
2001 M3:Stick, what else?
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Quote:
Originally posted by atyclb
no
LOL! Ok--- it's due to???? Someone on another board here is claiming the Eisenmann exhaust changed the sound of their Mcoupe.
  #8  
Old 05-12-2003, 09:34 AM
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Quote:
Originally posted by JPinTO
LOL! Ok--- it's due to???? Someone on another board here is claiming the Eisenmann exhaust changed the sound of their Mcoupe.
a new exhaust can muffle the buzz, but it will still be there. There has been much specualtion as to the true source, including some who think it's in the VANOS.
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  #9  
Old 05-14-2003, 07:48 PM
GregW in Oregon GregW in Oregon is offline
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Quote:
Originally posted by atyclb
a new exhaust can muffle the buzz, but it will still be there. There has been much speculation as to the true source, including some who think it's in the VANOS.
The most likely source of the "rasp" is at the headers, IMO. Both Racing Dynamics and Tubi claim the cross-flow pipe, which brings the two separate tailpipes pipes together at a point before the muffler, will decrease or eliminate this trait. We'll see.
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