[QUOTE=RED MX5,Apr 29 2006, 11:56 PM] Speed wasn't the issue here.

 

[QUOTE=krisl,Apr 30 2006, 02:37 PM]Ummm

Speed was the issue here.

If your tires are cold, you shouldn't be driving as fast.

That said, non R compound tires' grip differential between "cold" and "hot" on a reasonably warm day (60+F) is what, 5-10%???

 

The harder the tire, the less difference there will be between hot and cold performance. A very soft tire will show a huge difference, particularly if the cold is very cold.

That in mind, the Bridgestone Potenza S02s are extremely soft for a road tire (treadwear rating of 140 speaks volumes). AP2 tires are harder if I am not mistaken.

 

[QUOTE=Riceboi,Apr 30 2006, 04:32 AM]I understand. Don't count on it for that last sentence btw.

 

Also, all else being equal, a tire with a higher speed rating takes longer to reach operating temperature.

However, what Krisl is saying is true. Any time a driver loses control speed is a factor. After all, it's pretty hard to lose control when you're stopped.

When I said speed wasn't the issue here, what I meant was that this was one of those spins that takes place at "normal" cornering speeds, rather than one that takes place because the driver was testing the cars limits.

S02's don't deliver good grip when cold. When 1/2 the tread is gone the grip on wet roads is reduced, and continues to diminish with continued wear. The profile and stiff sidewalls make it impossible to tell when the tires are low on air by simply looking, and you have to look at the *inside* of the back tires to determine their true wear, becaue they are unsafe in the wet before the tread on the outside of the tire is worn down to the wear bars. We put up with all that because they deliver such great traction when we respect their limits, but owners need to learn enouogh about the tires to avoid the most common mistakes (and then we have to keep them in mind when we drive). The tires are NOT at fault when somebody spins, but sometimes they are a major contributing factor.

 

ok, this is also my first manual but have picked up on how to downshift smoothly, all you gotta do is blip the throttle a little while letting (or before letting) the clutch out and the car will be very smooth and you won't even feel it. yeah heal and toe is hard but when just downshifting normal, blipping the throttle works really well.

 

It's normal for the car not to start right away after a spin. I'm not sure the details of why but it is normal for it to take 20-30s to start after it turn backwards. If you can get your foot to the clutch before it goes around you can keep it running but if it dies due to spinning then it take a while to get it going again.

 

Do these engines have an oil pressure kill switch? If the return was starved (during the sloshing and high transient loads associated with a spin) the ECU could cut the engine.

Our formula car was required to have a oil pressure kill. It was a little over anxious most of the time so we just ran with it disabled usually. We had an extra switch on our dash that was unlabed so judges wouldn't know we could bypass it.

 

I've taken that turn much faster many times on warmer days and with warmer tires. No problems whatsoever. That day i just got too excited (gettin a raise) after i left work and was in a haste. Its all good i got lucky and now i know to pay a bit mkore attention and respect. Again i attribute it to cold tires 100%. Re50s might not be as sticky but they are pretty responsive to heat issues or lack of heat.

 

[QUOTE=RED MX5,Apr 30 2006, 01:21 PM] However, what Krisl is saying is true.