The BMW UUC Digest Volume 3 : Issue 534 : "text" Format Messages in this Issue: Re: FW: Something for everyone Underdrive pulley Re: Underdrive pulley Re: Underdrive pulley Re: Underdrive pulley Key Blank Wheels
---------------------------------------------------------------------- Date: Thu, 2 Aug 2007 14:40:08 -0700 From: Bob Sutterfield <[EMAIL PROTECTED]> To: [email protected] Subject: Re: FW: Something for everyone Message-ID: <[EMAIL PROTECTED]> Turns out the story wasn't quite like that: http://www.snopes.com/photos/automobiles/barnfind.asp On 2/5/07, Alex Cagann <[EMAIL PROTECTED]> wrote: > From the audi list I'm on. Pretty cool stuff. > > Alex > > > -----Original Message----- > > (Forwarded from another list, as I'm sure this will be.) > > > > Seems someone in Portugal unsealed a warehouse that's been > > sealed up with its doors welded shut for at least 15 years, > > and found this lot. > > Scroll down to get to the photos. > > > > http://forum.autohoje.com/topic.asp?TOPIC_ID=97706&whichpage=7 ------------------------------ Date: Thu, 2 Aug 2007 19:41:51 -0700 From: [EMAIL PROTECTED] To: [email protected] Subject: Underdrive pulley Message-ID: <[EMAIL PROTECTED]> Do the underdrive pulley's have an significant impact to the tuning of the stock harmonic balancer? It would seem that any change of coupled harmonics would be damped considerably by the belts. Maybe Neil can weigh in. Thinking when I need to replace the radiator to also replace the pulley's and use the Stewart water pump. -Kevin On the E36, M3. ---------------------------------------------------------------- This e-mail communication is confidential and is intended only for the individual(s) or entity named above and others who have been specifically authorized to receive it. If you are not the intended recipient, please do not read, copy, use or disclose the contents of this communication to others. Please notify the sender that you have received this e-mail in error by replying to the e-mail. Please then delete the e-mail and any copies of it. Thank you. ---------------------------------------------------------------- ------------------------------ Date: Thu, 2 Aug 2007 22:47:19 -0400 From: "Carlos Lopez" <[EMAIL PROTECTED]> To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> Cc: [email protected] Subject: Re: Underdrive pulley Message-ID: <[EMAIL PROTECTED]> On 8/2/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > Do the underdrive pulley's have an significant impact to the tuning of the > stock harmonic balancer? It would seem that any change of coupled harmonics > would be damped considerably by the belts. Maybe Neil can weigh in. No need, the crank pulley isn't underdriven. At least on my car I've had one instructor think I had a ltw flywheel when I don't. Car makes more power than I expected with the usual bolt on stuff and underdrive pulleys. Carlos 98 M3 (239 rwhp, 226 tq on a Dynojet during a NASA race weekend) ------------------------------ Date: Thu, 2 Aug 2007 23:24:58 -0400 From: "Karl Rentler" <[EMAIL PROTECTED]> To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>, "UUC List" <[email protected]> Subject: Re: Underdrive pulley Message-ID: <[EMAIL PROTECTED]> On 8/2/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > Do the underdrive pulley's have an significant impact to the tuning of the > stock harmonic balancer? It would seem that any change of coupled harmonics > would be damped considerably by the belts. Maybe Neil can weigh in. > Thinking when I need to replace the radiator to also replace the pulley's > and use the Stewart water pump. > > -Kevin > On the E36, M3. > Can't comment on the Underdrive pullies. I'd go with the Stewart pump if/when you are replacing the cooling components. I'd also go with an all aluminum rad. if your replacing it. Karl 95 M3 ------------------------------ Date: Fri, 3 Aug 2007 09:27:34 -0400 From: "Rob Levinson * UUC Motorwerks" <[EMAIL PROTECTED]> To: <[email protected]> Subject: Re: Underdrive pulley Message-ID: <[EMAIL PROTECTED]> There are two types of pulleys commonly referred to as "underdrive pulleys". The first type is a single pulley that replaces the crank pulley. At the same time, because it's all one piece, it removes the harmonic damper. As representatives from BMW NA described in the last CCA meeting at NA HQ, you'd have to be a fool to use such a part. That's a rough paraphrasing, but connotes the clear signals of the statement. Removing the harmonic damper, as happens with an underdrive crank pulley, is a very big risk to crankshaft integrity from secondary harmonics causing cracks and failure, an effect documented on street and racecars that see frequent high rpm (why would you own a BMW unless you are going to see frequent high rpm? ). Dinan has a very good "white paper" on the subject: http://www.dinancars.com/whitepapersFile.asp?ID=5 The second type of pulley is actually a set of accessory pulleys. This leaves the crank pulley alone, but changes the size of the individual pulleys on the water pump and power steering pump. Some companies offer an underdrive alternator pulley, but that's effectively worthless as the voltage regulator compensates and creates as much draw load as it wants. These underdrive accessory pulleys do not affect the harmonic damper whatsoever and can be used safely in any situation, including with a lightweight flywheel. - Rob ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[email protected]> Sent: Thursday, August 02, 2007 10:41 PM Subject: [UUC] Underdrive pulley > > Do the underdrive pulley's have an significant impact to the tuning of the > stock harmonic balancer? It would seem that any change of coupled harmonics > would be damped considerably by the belts. Maybe Neil can weigh in. > Thinking when I need to replace the radiator to also replace the pulley's > and use the Stewart water pump. > > -Kevin > On the E36, M3. > > > > ---------------------------------------------------------------- > This e-mail communication is confidential and is intended only > for the individual(s) or entity named above and others who have > been specifically authorized to receive it. If you are not the > intended recipient, please do not read, copy, use or disclose > the contents of this communication to others. Please notify the > sender that you have received this e-mail in error by replying > to the e-mail. Please then delete the e-mail and any copies of > it. Thank you. > ---------------------------------------------------------------- > > > > > Search the ARCHIVES:http://www.mail-archive.com/[email protected] > > > __________________________________________________________________________ > In memory of Michel Potheau - friend, enthusiast, founder of the BMW CCA. > > UUC Motorwerks - BMW Performance Fine-tuning and home of the Ultimate > Short Shifter - accept no substitutes! > 908-874-9092 . http://www.uucmotorwerks.com ------------------------------ Date: Fri, 03 Aug 2007 14:58:01 +0000 From: "Gilbert Hoffman" <[EMAIL PROTECTED]> To: [email protected] Subject: Key Blank Message-ID: <[EMAIL PROTECTED]> I have discovered a key blank, and don't know what it is for. (2002?) Blank says BMW BM3 on one side and some manufacturer info on the other. Anyone know what it is for? How much it is worth? Gilbert _________________________________________________________________ A new home for Mom, no cleanup required. All starts here. http://www.reallivemoms.com?ocid=TXT_TAGHM&loc=us ------------------------------ Date: Fri, 3 Aug 2007 13:37:10 -0700 From: [EMAIL PROTECTED] To: [email protected] Subject: Wheels Message-ID: <[EMAIL PROTECTED]> Anyone have experience with the Dinan wheels (Fikse FM/5 type)? If so , do they have a tendency to leak? I tightened the valve stems but they still steadily loose air on both fronts. The tires are fairly new. I figure the fasteners which attach the rim to the center sections must be leaking. -Kevin ---------------------------------------------------------------- This e-mail communication is confidential and is intended only for the individual(s) or entity named above and others who have been specifically authorized to receive it. If you are not the intended recipient, please do not read, copy, use or disclose the contents of this communication to others. Please notify the sender that you have received this e-mail in error by replying to the e-mail. Please then delete the e-mail and any copies of it. Thank you. ---------------------------------------------------------------- ------------------------------ End of [bmwuucdigest] digest(7 messages) **********
