The BMW UUC Digest Volume 3 : Issue 471 : "text" Format Messages in this Issue: Re: Street vs. Track tires at the track Re: Street vs. Track tires at the track Re: Street vs. Track tires at the track Re: Street vs. Track tires at the track Re: Street vs. Track tires at the track Re: Street vs. Track tires at the track Re: Street vs. Track tires at the track Re: The next headlight: Re: The next headlight: Tires Re: teaching B students Re: teaching B students Re: Street tires at Track Re: Street tires at Track Re: Tires
---------------------------------------------------------------------- Date: Wed, 2 May 2007 14:56:49 -0700 From: Mark Dadgar <[EMAIL PROTECTED]> To: [email protected] Subject: Re: Street vs. Track tires at the track Message-ID: <[EMAIL PROTECTED]> On May 2, 2007, at 2:49 PM, JS Nord wrote: > It's the guys in C who think they should run in A usually that do. > Just enough seat time to think they know what they are doing > without enough experience or humility to know what they don't. Yup. I say this regularly: it's the high-C/low-B students that are the scariest. They have the basic skills to go really fast but lack the calibration to know when they're screwed and the skills to do anything about it. - Mark, been there done that ----- [EMAIL PROTECTED] Check out my JustRacing homepage at: http://www.justracing.com/homepage/mdadgar ------------------------------ Date: Wed, 02 May 2007 16:04:31 -0700 From: Kazuto Okayasu <[EMAIL PROTECTED]> To: [email protected] Subject: Re: Street vs. Track tires at the track Message-ID: <[EMAIL PROTECTED]> At 02:56 PM 5/2/2007, Mark Dadgar wrote: >Yup. I say this regularly: it's the high-C/low-B students that are >the scariest. They have the basic skills to go really fast but lack >the calibration to know when they're screwed and the skills to do >anything about it. Uhoh, I think I'm starting to approach this area. But everyone so far has told me that my getting two 4-wheel offs in my first 3 schools without incident was probably a good thing. Good thing for Mark is that so far he's only been my classroom instructor. Kazuto Okayasu Manager, Desktop Support Services Administrative Computing Services, University of California, Irvine [EMAIL PROTECTED] ------------------------------ Date: Wed, 2 May 2007 16:11:46 -0700 From: Mark Dadgar <[EMAIL PROTECTED]> To: [email protected] Subject: Re: Street vs. Track tires at the track Message-ID: <[EMAIL PROTECTED]> On May 2, 2007, at 4:04 PM, Kazuto Okayasu wrote: > Good thing for Mark is that so far he's only been my classroom > instructor. > And a classroom that I was called on to do at the last minute and fairly unprepared for, too. :) - Mark ----- [EMAIL PROTECTED] Check out my JustRacing homepage at: http://www.justracing.com/homepage/mdadgar ------------------------------ Date: Wed, 2 May 2007 19:15:32 -0700 From: "Kirk" <[EMAIL PROTECTED]> To: <[email protected]>, <[EMAIL PROTECTED]> Subject: Re: Street vs. Track tires at the track Message-ID: <[EMAIL PROTECTED]> On Wed, May 2, 2007 1:33 pm, Kirk Lachman said: > Now I'm at a point where doing the same thing on R-compound tires isn't a > problem, but I got there by getting comfortable doing it on street tires. > I'm still slower than the really fast guys I run with now, but I'd even be > further back w/o the experience of running on street tires at DEs. Jim Bassett stated: Oh, so THAT'S how you've done it :-) Well it sure as heck wasn't due to any inate skill or coordination. It was from constant beatings from my BMW CCA Instructors (Sherman 'the German' Koo, Robin McNutt, Blaine McNutt, Dan Tackett, Carl McGinn, etc., etc.). I found it easier to do what they told me to do instead of what I wanted to do. >Jim Bassett - flailing around trying to keep up with Kirk :-) With quite a bit less hp, no doubt (although your car is lighter, right?!). =8^P Cheers, Kirk Lachman Sin City Chapter '95 M3 #21 I-stock sponsored by NOS! (not) ------------------------------ Date: Wed, 2 May 2007 20:52:27 -0700 From: "Kirk" <[EMAIL PROTECTED]> To: <[email protected]>, <[EMAIL PROTECTED]> Subject: Re: Street vs. Track tires at the track Message-ID: <[EMAIL PROTECTED]> Karl wrote: >OK Kirk I listened up good. You may be seated. :-) >I agree with you, but once you've figured out how to slide your car on >R-comps, using streets for the track SUCKS! I dunno. Any track time is good track time. Besides, where's the challenge on R-compounds in a school if you race? I like the expression on a student's face when you tell them you're running street tires, stock brake pads, stock suspension, etc. Teaching is a lot easier once they see that it can be done. >87 325 KP running Hoosiers Ok, having run an '87 325iS in K-stock, I feel your pain. Kirk ------------------------------ Date: Wed, 2 May 2007 20:11:21 -0700 (PDT) From: "Jim Bassett" <[EMAIL PROTECTED]> To: [email protected] Subject: Re: Street vs. Track tires at the track Message-ID: <[EMAIL PROTECTED]> On Wed, May 2, 2007 7:15 pm, Kirk said: > Jim Bassett stated: Oh, so THAT'S how you've done it :-) > > Well it sure as heck wasn't due to any inate skill or coordination. That was the implication :-) >>Jim Bassett - flailing around trying to keep up with Kirk :-) > > With quite a bit less hp, no doubt (although your car is lighter, > right?!). With cams, should be close to your HP, but lighter I'm sure (~2900lbs, with my skinny arse in the seat :-)). And with a supposed "better" suspension I should be able to keep up with you. But I can't, hence the "flailing". Anyone in Socal the weekend, come out to Willow Springs and watch me embarrass myself some more :-) Jim Bassett ------------------------------ Date: Wed, 2 May 2007 14:59:18 -0700 (PDT) From: Tammer Farid <[EMAIL PROTECTED]> To: [email protected] Subject: Re: Street vs. Track tires at the track Message-ID: <[EMAIL PROTECTED]> I agree with both K's here. Several schools on street rubber is absolutely beneficial. But there's a point at which you're going fast enough to take the outside edge of your street tires to a bald strip in a day or two, and it's just plain cheaper to go to Rs (and more fun at that point, too). -tammer --- Karl Rentler <[EMAIL PROTECTED]> wrote: > On 5/2/07, Kirk Lachman <[EMAIL PROTECTED]> wrote: > > Ok, listen up and listen up good. ;-) > > OK Kirk I listened up good. > > I agree with you, but once you've figured out how to > slide your car on > R-comps, using streets for the track SUCKS! > > Karl > 87 325 KP running Hoosiers > 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 > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------------ Date: Wed, 02 May 2007 15:00:41 -0700 From: Kazuto Okayasu <[EMAIL PROTECTED]> To: "[uucdigest]" <[email protected]> Subject: Re: The next headlight: Message-ID: <[EMAIL PROTECTED]> At 11:52 AM 5/2/2007, bbarry wrote: I'm a big fan of LED lighting, so I'm looking forward to developments in this area. I saw one of those Powered-by-Lambo Audi S6 the other day, and it has LED DRLs on it. As the article states, there are cooling issues (surprising, considering the kind of LEDs most people are used to), and also lens/focusing issues that are finally being worked out. Anyone with a 2/3/4cell C or D Maglite should get the new MAG-made LED upgrade kits. They are well worth it at <$20, as they are one of the few I've seen that let you fully retain the focusing function. >the next headlight: >http://www.manufacturingcenter.com/dfx/news/stories/feature-5.asp > >Barry >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 Kazuto Okayasu Manager, Desktop Support Services Administrative Computing Services, University of California, Irvine [EMAIL PROTECTED] ------------------------------ Date: Wed, 2 May 2007 18:48:30 -0700 From: [EMAIL PROTECTED] To: [email protected] Subject: Re: The next headlight: Message-ID: <[EMAIL PROTECTED]> LED's are interesting as light sources. There are some LED's that are such a bright point source that you can't look directly at them. Some of these are actually indirect sources as the LED is an UV emitter which then activates a UV sensitive phosphor which then emits a visible wavelength(s). However, that said, the light output and reliability are a direct function of their junction temperatures (the temp at the band transition point between the hole rich and electron rich semiconductors). To keep the junction within a maximum allowed region requires higher cost if operating in a high temp ambient (read car or BMW for OBMWC) in order to dissipate that heat from the junction. As efficient as they are these temps can get pretty high and the power densities also given the small size of the devices. This can be mitigated somewhat by switching the devices off and on at a rate that looks continuous to your eye. There is also another set of components to balance the currents through the devices (they're not all alike) and if needed to drop voltages to keep within the forward operating voltage of the LED. This can also dissipate a fair amount of heat. I would guess that when in motion you can always direct cool air over the LED. But then there's the moisture problem. Bottom line,,,, more complicated than just lighting off a cathode in an inert gas. -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. ---------------------------------------------------------------- ------------------------------ Date: Wed, 2 May 2007 15:32:08 -0700 (PDT) From: kjk <[EMAIL PROTECTED]> To: [email protected] Subject: Tires Message-ID: <[EMAIL PROTECTED]> I have had the distinct pleasure (or curse) of having some recent rainy track days (yes, even here in California). I was lucky enough to have basically a Dinan suspension and full tread RA1's. I was really quick compared to the race cars until it started to dry out. ;-) They work great in the rain and there was lots of standing water on the track. As for street tires vs. R comps. I did the street tire thing for about 1.5 years and maybe 20+ days and then I was lent some RA1's for an afternoon. Sorry, that was all she wrote. Too much fun. I got sideways enough in high school. As a practical matter, few street tires will take the abuse an RA1 will without chunks of the shoulder breaking off. If you want to simulate a street tire, just run 37lbs of presure cold in an RA1. About the the third lap things will get interesting. A friend got 6-7k miles on a set of RA1's on the street in his M6 (3600lbs+?). I think you could coax 8-10k on an E36 M3. I think one 20 minutes session on track does way more damage than thousands of miles of street driving. Plus, unless you have 3.0+ degrees of camber, the track driving wears the outer shoulder while BMW's typically wear on the inside on the street. My car weighs 3800lbs and I can get a bunch of days out of RA1s', flip them on the rim and get some more. Kevin Kelly '91 M5 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------------ Date: Thu, 3 May 2007 01:29:08 +0000 (UTC) From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> To: <[email protected]> Subject: Re: teaching B students Message-ID: <[EMAIL PROTECTED]> > Yup. I say this regularly: it's the high-C/low-B students that are > the scariest. They have the basic skills to go really fast but lack > the calibration to know when they're screwed and the skills to do > anything about it. Teaching on the skidpad is a good thing. It's a long day of work, but nobody goes much faster than 40. Plus, you get to hone your skills during downtime. Marc Plante E36 M3/4 Vienna, VA ------------------------------ Date: Wed, 2 May 2007 19:11:39 -0700 From: Mark Dadgar <[EMAIL PROTECTED]> To: [email protected] Subject: Re: teaching B students Message-ID: <[EMAIL PROTECTED]> On May 2, 2007, at 6:29 PM, [EMAIL PROTECTED] wrote: > Teaching on the skidpad is a good thing. It's a long day of work, but > nobody goes much faster than 40. Plus, you get to hone your skills > during downtime. Amen. I take advantages of the Car Control exercises at lunch to this day: <http://www.justracing.com/galleries/displayimage.php?album=183&pos=64> I draw the line at the skidpad, though. The truck is just too soft and top-heavy (the motor weighs 800 lbs by itself!). - Mark ----- [EMAIL PROTECTED] Check out my JustRacing homepage at: http://www.justracing.com/homepage/mdadgar ------------------------------ Date: Thu, 3 May 2007 01:35:02 +0000 (UTC) From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> To: <[email protected]> Subject: Re: Street tires at Track Message-ID: <[EMAIL PROTECTED]> And there is NOTHING like deflating an overblown ego by outrunning a modified car on R compounds in your stock car on streets. They keep looking at your car, trying to figure out what you really did to it. Marc Plante E36 M3/4, 78k (OK, I have a shift kit and seats) Vienna, VA ------------------------------ Date: Wed, 2 May 2007 22:00:12 -0700 (PDT) From: Tammer Farid <[EMAIL PROTECTED]> To: [email protected] Subject: Re: Street tires at Track Message-ID: <[EMAIL PROTECTED]> This is especially fun when you're in an E28. A couple modded (cams, intake, SW, StopTechs) E46 M3 drivers demanded that I pop the hood on the 535is after one session last year. They were disappointed to find a stock, unopened motor. That said, they were certainly faster than me, but not by much. :-) -tammer --- "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > And there is NOTHING like deflating an overblown ego by > outrunning a > modified car on R compounds in your stock car on streets. > They keep > looking at your car, trying to figure out what you really > did to it. > > Marc Plante > E36 M3/4, 78k > (OK, I have a shift kit and seats) > Vienna, VA __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------------ Date: Wed, 2 May 2007 21:34:00 -0700 From: "Marco Romani" <[EMAIL PROTECTED]> To: <[email protected]> Subject: Re: Tires Message-ID: <[EMAIL PROTECTED]> True - but it's a major PITA when you have a TPS that not only warns when the tire pressure is low, but also warns when it's high. Anything over 40psi sets off the "bong bong bong" in the CTS-V. Really annoying at the track. Marco -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gary Derian Sent: Wednesday, May 02, 2007 10:05 AM To: Matt Bader; [email protected] Subject: Re: [UUC] Tires You can safely go as high as the pressure branded on the tire. The benefit is less tire squirm, less rolling resistance, better rim protection and a harsher ride. Factory inflation recommendations are for fully loaded vehicles, and towards understeer. Gary Derian >I have seen posts about people running higher pressures on their tires. >I run my street tires (conti sport contact) at the basic >manufacture-recommended pressures of 30/35 I believe it is. How much >higher can you safely go, and what is the benefit (for street use >only) if any? > > Matt Bader > 98 M3/4 > Delaware 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 No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/784 - Release Date: 5/1/2007 2:57 PM ------------------------------ End of [bmwuucdigest] digest(15 messages) **********
