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09-15-2008, 08:59 PM | #1 |
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VIR Track Report, 3 M-DCT cars at HPDE
There were 3 M-DCT cars at VIR this past weekend. One in the instructor group, one in A group, and one in D group.
The car is really strong, really easy to drive fast, and everything held up great for the weekend. The car just keeps going and going, there was a vette and a couple of gt2/3s in our group that would slowly pull away from me, but not much else. The speedo showed 145-150, but my performance box only registered 140 or so on the front and back straights. Tires: I brought TRMotorsports 18x9 with 265-35-18 BFGoodrich gForce R1s on all 4 corners. The wore well, handled great, and I'd definitely recommend them. I ran w/o spacers all around, and also kept them around 42 psi hot. Front left had more wear on the shoulder, so I let it run a few psi higher and rotated them on Sunday morning. Brakes: Stock and Brake Fluid: Stock, There was some fade compared to my 330i with hawk ht-10 brake pads, so I'm waiting for the new PF-06's to be out in 2 months or so. The oil temp rose to about 250 or so during the 20 minute run sessions, with 93 to 96 degree ambient. It would cool down to 210 after a leisure trip around the paddock. Oil consumption: didn't move the electronic dipstick during the weekend Fuel consumption: not that good, but at least the track had plenty of premium gas at $4.55, hurricane Ike caused shortages at gas stations across north carolina and virginia over the weekend. I ran in M-Dynamic mode, didn't want to go DSC off for my first time with the car. It intevenes about 3 times each lap, but not enough to stop the fun. M-DCT downshift issue: Yes All 3 of us experienced the "I just don't want to shift" issue. So I'd finish braking, and as soon as I started my turn-in, I'd click click click from 6th to 3rd and start to roll into the throttle before the apex. Hope they can fix that via software. Added a couple of pictures
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Last edited by man02195; 09-18-2008 at 09:56 PM.. |
09-15-2008, 10:06 PM | #2 | |
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My experience with oil temps has been similar.
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Last edited by lucid; 09-15-2008 at 10:24 PM.. |
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09-15-2008, 11:04 PM | #3 |
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What is the story with the these Pagids? Streetable or no? Loud and squeeky when cold? Any idea on how bad they dust? I.e. just a track only pad? Going for fronts and rears? Cost? Still considering OEM BMW track pads?
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09-15-2008, 11:27 PM | #4 | |
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Here is the "friction vs temp" graphs for the different Pagid compounds although I don't really understand what has been plotted exactly: http://www.livermoreperformance.com/pagid.html#graph It looks like coefficient of friction, but against what type of disc surface exactly? The disclaimer acknowledges that the coefficient of friction is related to disc material, and the chart does not include any values for the y-axis. I must assume they tested the coefficient of friction on the same disc for the different compounds listed, but do not want to publish any values since they will vary depending on disc material. Don't know anything about how dusty the RS-19s are. Scroll to the top of that page for the official description of the compounds.
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Last edited by lucid; 09-15-2008 at 11:50 PM.. |
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09-15-2008, 11:28 PM | #5 | |
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Noise: Think school bus on steroids. Really noisy once they're bedded in and well used. Dust: not bad, really. Modulation: My wife refuses to drive the car with them on. Nose-bleed inducing if someone cuts you off and you tag the pedal in a hurry. Phenomenal at speed when hot. Cost: $800 for both axles. I would NOT mix them with anything else. Rotors: you need factory rotors with part numbers ending with "38x" where "x" is 5, 6, 7 or 8 depending on which corner you look at. You can see the numbers stamped into the rotor centers by looking through the wheels. Other notes: the rears work really hard on the track if you don't turn DSC to M-dynamic mode. OEM sport pads are hard to get and expensive. I priced them at $1500 in Canada, "not available" in the USA. |
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09-15-2008, 11:30 PM | #6 |
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Do you know what the offset of the TR Motorsport wheels are? What about the weight of the wheels?
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09-15-2008, 11:35 PM | #7 |
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Oh, one other question, what did the other MDCT owners have to say about driving it on the track? Obviously, we all know about the downshifting issue, no need to repeat those comments.
Did you get any pad transfer and thus vibration from the front rotors? I used the same technique for downshifting...after turn in and before the apex. It worked ok, but it certainly is a compromise.
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09-16-2008, 11:33 AM | #8 | |
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Here's sayemthree's thread on the wheels/tires http://www.m3post.com/forums/showthr...87#post2935787
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09-16-2008, 11:56 AM | #9 | |
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I did not have any vibration from the rotors, one of the other guys had one front rotor that had some vibration (we swapped the front tires and spun the rotors to see if it was warpage or deposits, he's taking it to dealer to check it out).
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09-16-2008, 12:36 PM | #10 | |
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Very very noisy on the street. Tried non-squeal sprays and backer plates to no use. |
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09-16-2008, 01:02 PM | #11 |
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If they worked on the street, probably be too perfect.
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09-16-2008, 01:08 PM | #12 | |
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I had them on my GT3 and loved them, asside from the sqeal-like-a-bus noise when they are cold....although I didn't care that much....but you WILL get looks from other peeps like "WTF is wrong with your car? Can't you hear that??" LOL
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09-16-2008, 01:09 PM | #13 |
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They work fine when cold, just a bit noisy!
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09-16-2008, 03:25 PM | #14 | |
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We do not have one yet. Our M3 is currently down at PFC so that they can get a pad shape for the pads and also design a big brake kit. Assuming all goes well it will take a couple of months to get pads made for the car. I also spoke with Hawk and they are still a couple of months out on pads for that car.
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09-16-2008, 08:20 PM | #15 | |
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"It's a software issue that has been resolved. It should be available around the first of October."
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09-16-2008, 11:47 PM | #16 | |
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I installed Stoptech stainless flex lines and Castrol SRF fluid in my system - the combination has really firmed up the pedal - it's like driving with a BBK and the pedal doesn't sink when the brakes heat up - heel and toe is much more consistent. |
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09-18-2008, 10:35 AM | #17 | |
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-------------------------------------------------------------------------------------------------------------- 2008 E92 M3 M-DCT - Sparkling Graphite - Fox Red - Tech Package - Premium Package - Moonroof - Enhanced Premium Sound - HD Radio - iPod USB interface - PDC - Remus Race Exhaust |
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