Underdrive Pulley Long-Term Reliability

SanFranciscoM3 · 06-13-2012, 03:30 PM

Anyone out there with 4+ years of experience with an underdrive pulley? I'm considering the MS pulley, but since I own my cars and tend to keep them long-term I'm interested in hearing about the long-term reliability.

Comments from E46 owners would be very useful too. This is for an e92, but I would be interested in hearing anyways.

malter2.0 · 06-13-2012, 03:37 PM

always a bad mod. you underdrive all your accessories and can run into problems as car ages. considering how much power it adds it is not worth the price or installatio. leave the car alone or put that money towards SC.

tibra1 · 06-13-2012, 03:41 PM

Quote:

Originally Posted by malter2.0

always a bad mod. you underdrive all your accessories and can run into problems as car ages. considering how much power it adds it is not worth the price or installatio. leave the car alone or put that money towards SC.

So no to a pulley b/c you can run into problems as the car ages but yes to a SC because you will face no problems as the car ages????...

OP not a worthwhile mod imo

///M_Monster · 06-13-2012, 04:47 PM

I plan on purchasing MS Underdrive Pulley soon!

Totally different, but my prior vehicle was a 350Z and an underdrive pulley was one of my first mods... Drove close to 80k miles over 5 years with it on and saw ZERO issues from my motor or any accessories! I expect that with better craftsmanship BMW's motor/accessories will produce the same if not better longevity...

I completely disagree with the above... For its cost, reliability and power return, Get it!

I will say to do your research with a good installer. Not necessarily something you'll want to "slap on".

THE TECH · 06-13-2012, 04:56 PM

I don't see any real issues with it.

aresh · 06-13-2012, 05:13 PM

Had it for a yr with an audio system installed. I had the same inquiries and let me tell you, pulleys are worth it. I noticed a huge difference in my butt dyno and so did the ppl that had driven the car prior to the pulley. O and no issues.

robert @ eas · 06-13-2012, 05:24 PM

We have sold quite a few Macht Schnell Underdrive Pulleys and we haven't had any issues with them.

Feel free to PM me if you have any further questions.

tom @ eas · 06-13-2012, 05:38 PM

Quote:

Originally Posted by SanFranciscoM3

Anyone out there with 4+ years of experience with an underdrive pulley? I'm considering the MS pulley, but since I own my cars and tend to keep them long-term I'm interested in hearing about the long-term reliability.

Comments from E46 owners would be very useful too. This is for an e92, but I would be interested in hearing anyways.

UDPs have been used for a number of years with no negative longterm effects, and a good "bang for the buck" mod. Their purpose is simple, less parasitic drag = more HP. UDPs don't add horsepower, they free up HP.

Here's a couple of threads to reference from:

Bang for the Buck Mods: Macht Schnell UDPs & Dyno Findings
http://www.m3post.com/forums/showthread.php?t=649151

Macht Schnell UDP/Stage 2 Intake & Akrapovic Dyno Findings
http://www.m3post.com/forums/showthread.php?t=567651

Hope these help, feel free to contact if you should have any questions.

GIdriver · 06-13-2012, 06:15 PM

Probably one of the best bang for the buck performance mod for our cars. Except for Turner Test Pipes, I believe no other mod will give you/free up ~10 hp for $400-$500. Do the math. I went with Dinan, which to my knowledge is the most aggressive, no issues.

BPMSport · 06-14-2012, 03:02 AM

I have had the RDSport one since 2008 with no issues. I am not sure about the other ones but have been happy with this one.

One of my dealer technician friends has told me that some of them cause the idle to bump up and down on cold start.

armyav8tor · 06-14-2012, 06:02 AM

Had the AA on mine since 2008 and no issues also.

Space Ghost · 06-14-2012, 09:51 AM

I had the AA on for three years prior to going FI. No issues.

youngbuck · 06-14-2012, 11:54 AM

Quote:

Originally Posted by Mike Benvo

I have had the RDSport one since 2008 with no issues. I am not sure about the other ones but have been happy with this one.

One of my dealer technician friends has told me that some of them cause the idle to bump up and down on cold start.

I've seen my car do this a couple times. Only on start up the revs jump from like 500-1000 2-3 times then the idle holds constant. I have a MS pulley by the way.

Thanks

06-13-2012, 03:30 PM	#1
SanFranciscoM3 Private 9 Rep 62 Posts Drives: e92 M3 Join Date: May 2012 Location: San Francisco iTrader: (0)	Underdrive Pulley Long-Term Reliability Anyone out there with 4+ years of experience with an underdrive pulley? I'm considering the MS pulley, but since I own my cars and tend to keep them long-term I'm interested in hearing about the long-term reliability. Comments from E46 owners would be very useful too. This is for an e92, but I would be interested in hearing anyways.
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06-13-2012, 03:37 PM	#2
malter2.0 Banned 61 Rep 908 Posts Drives: em-funf Join Date: Jun 2006 Location: SF Bay Area iTrader: (0) Garage List 2000 E39 M5 - current [0.00] 2007 E92 335i - SOLD [0.00] 1996 E36 M3-SOLD [0.00] 2000 E39 M5-SOLD [0.00] 2001 E46 M3-SOLD [0.00] 1995 E36 M3-SOLD [0.00]	always a bad mod. you underdrive all your accessories and can run into problems as car ages. considering how much power it adds it is not worth the price or installatio. leave the car alone or put that money towards SC.
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06-13-2012, 04:47 PM	#4
///M_Monster Private 11 Rep 55 Posts Drives: 2018 F80 M3 ZCP (on order) Join Date: Oct 2011 Location: Tampa, FL iTrader: (0)	I plan on purchasing MS Underdrive Pulley soon! Totally different, but my prior vehicle was a 350Z and an underdrive pulley was one of my first mods... Drove close to 80k miles over 5 years with it on and saw ZERO issues from my motor or any accessories! I expect that with better craftsmanship BMW's motor/accessories will produce the same if not better longevity... I completely disagree with the above... For its cost, reliability and power return, Get it! I will say to do your research with a good installer. Not necessarily something you'll want to "slap on".
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06-13-2012, 04:56 PM	#5
THE TECH BimmerPost Supporting Vendor 307 Rep 13,093 Posts Drives: BPMsport 2012 E92 M3 Join Date: Jun 2011 Location: Kansas iTrader: (45) Garage List 2013 Nissan GTR [0.00] 2019 Sierra Denali ... [0.00] 1999 Nissan Silvia [0.00] 1999 Nissan Skyline ... [0.00] 1998 Toyota Supra [0.00]	I don't see any real issues with it.
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06-13-2012, 05:13 PM	#6
aresh First Lieutenant 31 Rep 369 Posts Drives: 2006 550i Join Date: May 2009 Location: NY iTrader: (1)	Had it for a yr with an audio system installed. I had the same inquiries and let me tell you, pulleys are worth it. I noticed a huge difference in my butt dyno and so did the ppl that had driven the car prior to the pulley. O and no issues.
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06-13-2012, 05:24 PM	#7
robert @ eas BimmerPost Supporting Vendor 306 Rep 4,002 Posts Drives: BMW Join Date: Nov 2011 Location: 4015 E Leaverton Court, Anahiem, CA 92807 iTrader: (0)	We have sold quite a few Macht Schnell Underdrive Pulleys and we haven't had any issues with them. Feel free to PM me if you have any further questions. __________________ Robert T. \| european auto source (eas) email: robert@europeanautosource.com · web: https://europeanautosource.com· tel 866.669.0705 · ca: 714.369.8524 x21 GET DAILY UPDATES ON OUR BLOG · FACEBOOK · YOUTUBE · FLICKR · INSTAGRAM
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06-13-2012, 06:15 PM	#9
GIdriver Major 68 Rep 1,359 Posts Drives: 2014 E63 AMG-S Join Date: Dec 2010 Location: Somewhere in Time iTrader: (0)	Probably one of the best bang for the buck performance mod for our cars. Except for Turner Test Pipes, I believe no other mod will give you/free up ~10 hp for $400-$500. Do the math. I went with Dinan, which to my knowledge is the most aggressive, no issues.
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06-14-2012, 03:02 AM	#10
BPMSport BimmerPost Supporting Vendor 3387 Rep 7,541 Posts Drives: Harrop M3 / F10 M5 / F82 M4 Join Date: Apr 2008 Location: SoCal iTrader: (9) Garage List 2000 BMW M5 [0.00] 1990 BMW 735i Turbo [0.00] 2008 BMW M3 [7.50] 2015 BMW M3 [0.00] 2015 BMW M5 [0.00]	I have had the RDSport one since 2008 with no issues. I am not sure about the other ones but have been happy with this one. One of my dealer technician friends has told me that some of them cause the idle to bump up and down on cold start. __________________ -----\| Like us on Facebook \| Instagram \|\| Tuning Information \| Remote Coding \|----- ----Visit us at www.BPMSport.com - Emotion. Driven. \| Toll Free: (888) 557-5133----
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06-14-2012, 06:02 AM	#11
armyav8tor n1smo 97 Rep 1,483 Posts Drives: E92 M3 Join Date: Apr 2008 Location: Huntsville, AL iTrader: (1) Garage List 2020 Porsche Taycan 4S [0.00] 2016 Corvette Z06 [0.00] 2008 BMW M3 [10.00]	Had the AA on mine since 2008 and no issues also.
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06-14-2012, 09:51 AM	#12
Space Ghost Captain 11 Rep 619 Posts Drives: E92 M3 Join Date: Aug 2008 Location: USA-PA iTrader: (5)	I had the AA on for three years prior to going FI. No issues. __________________ 2008 E92 M3, ESS VT-1, AA Full Exhaust, Volk TE-37, PSS10, ST BBK, ARKYM Motorsport Spliter, Vorsteiner Diffuser, BMW Edition Grill/Gill's, BMW Performance Spoiler, AUTOcoture Blacked Out Headlights, LCI Tail lights, Vorsteiner Carbon Fiber Center Dash Insert, Ultimate Racing Pedals (Because Race Car), AA SSK, Speed Cloth.
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