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cold tires+700f/800r spg rates+trackday(downhill negative camber corner)=lucky car wasn't totalled..

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Old 10-16-2004, 04:30 PM
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Default cold tires+700f/800r spg rates+trackday(downhill negative camber corner)=lucky car wasn't totalled..

for those of you that know Mosport outside of Toronto, the track is a very highspeed track with turn #2 and turn #4 being very fast downhill negative camber corners - you can very easily total your car in these corners - never mind induce a roll and do bad things to yourself

i was at a track day today

it was my 3rd trackday with the Ohlins

it was 11C / 50F temperature

i usually like to run 40psi hot but Porsche mechanic at the track said he sets up his heavy cars at 38 hot - i tried this

i give it a "very" easy first lap (i'm expecting the front left tire to come up 8 / 10psi)

on second lap i'm still taking it very easy (2/3rds - still swerving to heat up tires)

i very, very comfortably enter into turn #2 and then the back end of the car comes around - no way was I remotely expecting this

i have driven this track 10 days - I know it very well

prior to the Ohlin's i was running KW V2's (higher spring rates in the front than the rear)

ATTENTION: for you track novices like me, make sure your tires get up to temperature when your car is dialled in for minimal oversteer - because when the tires are not fully heated (i.e all will get to 38 to 40) the car will have "major oversteer"!!

the only reason i didn't roll / flip / do major damage was that i was going 1/2 speed that i didn't hit the wall / tumble down the hill
Old 10-16-2004, 04:35 PM
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geez man, thanks for the heads up. glad you and your car are okay!
Old 10-16-2004, 04:47 PM
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Wow - glad you made it out okay. Lesson learned.
Old 10-16-2004, 05:27 PM
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when the tires were warmed up, it was a dream to drive, took a while to get the nerve back
Old 10-16-2004, 05:28 PM
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So no damage was done to the car?
Old 10-16-2004, 05:33 PM
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with this setup, i was able to easily hang with GT3s, hoosiered Z06s & vipers
Old 10-16-2004, 05:36 PM
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i had to get a screw driver and remove stones that were wedged between tire and rim - i was so lucky
Old 10-16-2004, 05:39 PM
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Yea, it could have been worse. Take it easy out there
Old 10-16-2004, 05:48 PM
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Default Were you going in too hot and did you lift off the accelerator to slow yourself??

Any lift off in a scenario that you describe and the rear will come right around.
Old 10-16-2004, 06:14 PM
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i was going in slow enough that i didn't even have to brake into the turn - was on light throttle


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