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Apr 30, 2006 | 09:29 PM

#31

RED MX5

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Joined: Feb 2004

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From: Dry Branch

[QUOTE=krisl,Apr 30 2006, 11:01 PM]I autocrossed our S2K for the first time yesterday, as a matter of fact.

Apr 30, 2006 | 09:35 PM

#32

RED MX5

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Joined: Feb 2004

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From: Dry Branch

Quote:

Originally Posted by slimjim8201,Apr 30 2006, 09:03 PM

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 spun a few times, and if you get the clutch in the engine doesn't die, so I don't think this has anything to do with a loss of oil pressure. The greatest cornering force is usually reached when the tires are operating at slip angles of around 5-degrees, so if we were going to lose oil pressure during a spin wouldn't we also be losing it during hard cornering?

Apr 30, 2006 | 09:52 PM

#33

WFO Racer

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Joined: Mar 2002

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From: Newport Beach

Quote:

Originally Posted by Ronin2k,Apr 28 2006, 06:19 PM

Decided to accelerate a bit too hard out of a turn before the tires were 100% warmed up (i drove maybe 1/4mi)

Street driving will rarely "warm up" street tires. Unless you run a tire with a sub 100 rating or are doing 4 wheel drifts in the canyons. If your tires don't show "canyon cheese" after a drive in the mountains, you did not warm them up to where they will really grip. I doubt you do this in the city.

FYI, your spin was a result of LOFT.

Apr 30, 2006 | 10:01 PM

#34

RED MX5

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From: Dry Branch

Quote:

Originally Posted by WFO Racer,May 1 2006, 12:52 AM

S02's have crappy grip until they are warmed up. These tires have a wear rating of 140, not "sub 100." Not being aware of the need to warm them has caused MANY accidents, so please don't advise AP1 owners that their tires don't warm up. That's wrong, and can cause others grief.

May 1, 2006 | 05:40 AM

#35

Ronin2k

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From: SoCal

Quote:

Originally Posted by WFO Racer,Apr 30 2006, 09:52 PM

WFO racer id like to see you do hard cornering with "cold tires" and do the same with tires that are warmed up. I guarantee you will notice a difference. Im not implying i have a F1 car where there is no grip below a threshhold. im just saying the tires will not grip as well as they should when they havent been heated up yet.