Fishtail / Wheelspin on 1-2 Shift
Joined: Oct 2006
Posts: 13,494
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From: Chiswick
my car used to step out when i would shift. Since i went to a 9lb flywheel it no longer does it. Its the inertia in the drivetrain that is making the tires spin. I would wait for the revs to drop before dropping the clutch inbetween shifts. You also may want to check tire pressure between the two, but usually its the slight gradient built into roads that will make a car slide to one side like that.
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Joined: Apr 2008
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From: Detroit, WA
Originally Posted by ZDan,Apr 26 2008, 04:15 AM
The back end started to come out and you gave it MORE gas?
You don't want to lift when the back end gets loose, but you don't want to give it more gas either! Neutral throttle.
If the back end wants to come out on the 1-2 shift, you need to work on being smoother with upshifts.
You don't want to lift when the back end gets loose, but you don't want to give it more gas either! Neutral throttle.
If the back end wants to come out on the 1-2 shift, you need to work on being smoother with upshifts.
...How would you shift smoothly and fast? Takes a lot of time to let the RPMs drop a little and slip the clutch.
I'll check tire pressures before tomorrow's Auto-X.
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Joined: Apr 2008
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From: Detroit, WA
Originally Posted by ZDan,Apr 26 2008, 06:58 AM
So you went from the tires being relatively highly loaded under acceleration, to being unloaded under braking, while they were spinning and had no lateral grip? This was a Big Mistake. If the car was already yawing (coming around) before you got on the brakes, getting on the brakes would only act to increase the rotation of the car.
BTW, I just did a couple 1-2 pulls on a highway near me (Michigan is set up weird, there's opportunities to do U-turns everywhere), and the car was a lot more behaved. However, I'm sure these tires are really sensitive to temperature. I also noticed that the clutch delay valve is a lot more intrusive than it was the night this happened.
Joined: Aug 2007
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Sounds like the previous owner has put harder tires on the rear (much less expensive and easier to "light up"). The previous owner may also have tinkered with the clutch master cylinder setup and removed a shock reducing orifice. A simple s2k rule is if one breaks the rear tires loose, the car is basically out of control.
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i suggest when you're at the autox, spin out a lot. loose control on purpose.
shift while in a turn (dont make a habit of this) to break the rear loose.
treat the autox as a training ground instead of a race course.
let the car get out of control and practice managing it.
get used to being in the "oh sh!t" situation so that if it ever happens on the street, you'll be less panic and more ready to pull out a save.
shift while in a turn (dont make a habit of this) to break the rear loose.
treat the autox as a training ground instead of a race course.
let the car get out of control and practice managing it.
get used to being in the "oh sh!t" situation so that if it ever happens on the street, you'll be less panic and more ready to pull out a save.
