47 deg. outside and 3rd gear wheelspin

[90e34535i]

I took a drive late tonite, and my in car Temp gauge said it was 47-49 deg. F outside.

I couldnt get ANY traction in 1st or 2nd gear. I had to give it about 1/4 throttle in 2nd to keep from spinning and just pegging the rev limiter.

I surely thought 3rd gear would be fine though. I stuck it in 3rd gear around 3000 rpm, and slowly rolled on the throttle. After the Turbo hit around 60-70 mph, the back end of my car starts going SIDE WAYS!!, so Im like "wtf", then slowly counter steer and slowly release the throttle. It was crazy counter steering to keep the car straight going that fast, im used to doing it in 2nd gear, but never 3rd.

Ive been running 15 psi for a while now, but Just recently fixed some intermittent connection Issues.

Now ive been moving my AFR from the High 10's into the Low to mid 11's, and the car is getting pretty fast.

When its warmer outside durring the day, slow rolls in 2nd usually causes wheel spin now.

Ive tried turning up the boost, but I think my Bosch Bypass Valve is leaking above 15psi. i heard it kinda fluttering while flooring it, and my boost wouldnt get any higher while using a Manual Boost controller, it actually dropped. So I ditched the Boost controller, and will just run 15psi Wastegate spring pressure for now.

I just need to flush my coolant because Ive been living with kinda bad cooling(coolant temp jumps up under substained boost), then I hope to get a Dyno done soon.

[Duke]

Time for some new rubber. Are you running 255s in the rear?

[Rich Euro M5]

Time for some new rubber. Are you running 255s in the rear?

Depends on what compunds his tires are too. If he's running summer tires they tend to get slippery when the temps start cooling off. The Dunlop SP8000s that came on the M5 made it feel like driving on ice at temps around 40 degrees with wet roads. Very scary indeed.

But if he's now justing getting his tuning correct, he may very well need more tire.

Just my $.02

Rich

[90e34535i]

Im only running a 235 tire on a 17x8 wheel. Its some japanese tire that was on the car when I bought it. Ive never noticed wheelspin like that in the cold before though.

I have 2 pretty new bfg G-Force Sport tires in the front, I think its time to switch them to the back to see if it atleast helps.

[Craig -535i- Seattle]

Those g-sports are pretty damned grippy.

[Duke]

I'm only running a 235 tire on a 17x8 wheel. Its some Japanese tire that was on the car when I bought it. Ive never noticed wheel spin like that in the cold before though.

Yea, you will need to get 9" wide rear wheels and run 255/40 tires.

I just put on a new set of Goodyear Eagle F1 GS-D3. I read a Consumer Reports comparison of 12 different high performance tires and these were #1. The Bridgestone Pole Positions ranked #4. I was going to go with them until I read this report.

They were also on close out from the TireRack and I got 235/45 for the front and 255/40 for the rear for a good deal.



The 255s do still spin though

About time to install the traction control.