GT325

This. Mooty speak truth. I run ps4s on my GT cars for street. They are decent in cold and rain. Still likely death in snow that is if you get them to move at all.

marcus1982

That is to be expected with performance summer tires and 500hp on snow LOL. Is is sufficient just to be cold, like freezing in dry conditions to skid very easily with ps4s.

Cyclman

Op temp for those tires is well above 110F (160], so tire wise they may have been cold.

MexicoBlueTurboS

First and foremost - glad no one was seriously hurt. I don't have a GT3 but did notice about two years ago my Turbo S didn't go straight with all of the nannies on

More than likely it was older tires as there weren't any other likely suspects (sand, cold, dumbassery, etc) normal acceleration.

I also used to have a Norton 850 Commando and recall that grooved concrete would absolutely make the bike squirrely. I just avoided those roads once or if known.

I also had a 300D Merc back in the day, would do fine until it would cross an icy bridge and if applying any gas at all, the back end would break out and scare the living **** out me. The solution was to coast across bridges. I attributed it to a heavy diesel engine and an empty trunk. Carrying sand bags in the back might have helped but there were only 2 bridges to worry about on my way home and they were both short.

MexicoBlueTurboS

Grooved concrete gave my motorcycle fits. It would get very squirrely. @Big Swole has Cup 2s on his Turbo S and raced motorcycles.

jreifler

Dude. C’mon. 90mph is basically standard interstate speed across this country. And outside of interstate driving, there’s nothing inherently dangerous about reaching 90 mph on a public road where you know the environment, you’re in control of your car, and you’re not weaving through traffic / endangering others. Don’t shame the OP for the kind of driving that virtually everyone here does, and likely does infinitely more responsibly than the general public. Not a helpful comment.

@arowden86 - Not camber. At most, extreme camber will cause it to tramline and follow imperfections in the concrete. I’m with @mooty on toe / something else wrong to cause TC to malfunction. That happened to me on track in my GT4 with tires (slicks) that were incorrectly sized front to rear in diameter - just enough to throw the brain off. TC went nuts and it spun at a point on track where it never had before and never did subsequently.

Holli82

Glad you’re OK. Wishing your fiancé a full and speedy recovery.

I live in Vegas (Summerlin) as well. With the recent rains we have gotten, some of the roads get a layer of oil that make them slippery for a few days.

wootloops

If OP was truly driving in a straight line on a 110F summer day, I don't buy the cold Cup 2 tire argument. Even if they are not up to optimal temp for optimum lap times, they were certainly hot enough to not randomly spin the car out at 90mph going straight. I live in Florida with similar temps and at least half of the people on i95 do 80-90mph every day, many of which are on rock hard, cheap all season tires that have even less grip than a "cold" Cup 2 (and they are not spinning the car in a straight line).

You may say "But what about the fact that he's driving a 500hp GT3?" - Don't forget the GT3 makes under 340ft lbs of torque at the crank, a number that is maybe 10-20% more than the average car on the road and well below many average "sporty" cars that are driven with much skinnier, less grippy tires (BMW 340i, Mustang GT, Camaro, etc). And HP is less relevant than torque when it comes to losing traction.

To me the other theories make more sense... Something up with the ESC/TC system, a very bad alignment, something wrong with the suspension, or some kind of oil/fluid spill on the road, or a combination of multiple factors. Unless there are other details the poster has not mentioned.

Larry Cable

<deleted> I didnt read that you'd crashed it...

markiegt3

Pretty short gearing (torque multiplier) helps them feel pretty lively desplite moderate engine torque output

Olsdog

If I had a dollar for every time I hit 90 on a public road in my GT3, I'd have a GT3rs.

p997s123

lol

socalcarguy

Yeah, 90 is the typical speed here in Los Angeles.

DreamCarrera

Glad to hear that you are okay and hoping for a speedy recovery for your fiancee...also hope you have a smooth time in dealing with the insurance company. Is it possible that there was something slick on the roadway that you failed to see - fresh oil, coolant, random chemical(s), etc.? Given the high ambient temps, C2Rs - even on grooved pavement - should not have caused a loss of control during straight line acceleration IMHO. I'd really be interested to know if something broke (or came loose) on the car, causing the snap oversteer.

flyjets

arowden86

Remember in your shifter Kart days it takes approx. 2 laps to heat cycle the tires.

The Cup R is worse it doesn't heat up quickly it's a terrible tire in the cold or wet. .Even though 110F outside it doesn't mean on highspeed no G load there up to temp.

Last thing I've had my old 75, 85 completely side ways never a modern Porsche check the ride height and corner balance camber and castor something isn't right.

Most important save the nonsense for a track and take care of your Fiancé.

Ian