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shahin said:
The sides of the tire seem to be wearing down and I was wondering if I should lessen the pressure in the tires or increase it. Also, what do you guys recommend for the pressure.
If the sides are wearing, that's a sign your pressures are too low (or that you're beating your car mercilessly).
 
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Re: Re: Re: Hello, please help me out with tire pressure

nate328Ci said:


E46 M3, right?

What pressures are you at?

TD is right
Yeah, he doesn't specificy what car. Pressure recommendations differ for staggered vs non-staggered setups.
 

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Re: Re: Re: Re: Hello, please help me out with tire pressure

TD said:


Yeah, he doesn't specificy what car. Pressure recommendations differ for staggered vs non-staggered setups.
I suppose so, but I would stick to the factory recommendations in this car. It has an oversteer bias according to R&T :eek:
 
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Re: Re: Re: Re: Re: Hello, please help me out with tire pressure

nate328Ci said:


I suppose so, but I would stick to the factory recommendations in this car. It has an oversteer bias according to R&T :eek:
I ditto atyclb... "oversteer"?!?!?!
 
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We KNOW what over and understeer are. There is not one current production car that has inherent OVERsteer but many/most/damn near all have inherent UNDERsteer. The staggereed tire setup common on many SP BMWs exists solely to impart more UNDERsteer. Running factory tire pressures (which always call for LOWER pressures up front) also impart more UNDERsteer.
 

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TD said:
We KNOW what over and understeer are. There is not one current production car that has inherent OVERsteer but many/most/damn near all have inherent UNDERsteer. The staggereed tire setup common on many SP BMWs exists solely to impart more UNDERsteer. Running factory tire pressures (which always call for LOWER pressures up front) also impart more UNDERsteer.
Yes, I am familiar with this.

I have never driven a new M3 on the track, so I have to trust those that have. You haven't.

From R&T,

"To drive this car hard, I have to accept the fact that it needs to be sideways. It is almost a rally style of driving." "Tail-out fun that's easy to drive and pleasantly predictable when pushed." "with excellent balace and easy driver-induced oversteer" "I'd like to have a little more grip coming off the corner where I can really put some of that M power to the ground"

All of this implies to me, along with other things that I have read, that the E46 M3 needs more tire. It seems to exhibit light understeer at slower speeds, but be balanced or even oversteer prone at higher levels. I would like 245 front/ 275 rear on my M3.

btw, the Camaro (and Viper) are oversteer prone, not all modern cars are set up for it
 
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I'd have to think "inherent" and "driver-induced" are 2 different things. I think the serious track people go 255 or 265 all the way around.

Most people buying new tires go 245/275 and use equal pressure all around.
 

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Discussion Starter · #15 ·
I have an m3 with 19 inch factory option. I went autocrossing yesterday and my pressures were at 39 front and 37 back. I was drifting alot.

I increased them this morning to 42 front and 40 back. Is this ok??
 

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atyclb said:
I'd have to think "inherent" and "driver-induced" are 2 different things. I think the serious track people go 255 or 265 all the way around.

Most people buying new tires go 245/275 and use equal pressure all around.
"I pick up a little mid-corner understeer off power, but as soon as I touch the thottle again, the back wants to be sideways. The only way I really find out haw to be smooth with it is just put my foot down on the throttle, get the tires spinning, and then ease it into a nice slide versus trying to correct it"

Do you want to go power off though the turns? 265s up front?
 

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shahin said:
I have an m3 with 19 inch factory option. I went autocrossing yesterday and my pressures were at 39 front and 37 back. I was drifting alot.

I increased them this morning to 42 front and 40 back. Is this ok??
You are drifting the car? Yea, higher pressures will keep the sidewalls from touching the pavement :lmao:
 

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Hey There

Hey Shahin -

Before the runs, was your car near the end of cars in the lot close to the entrance?

If it was, I'm sorry I didn't meet you, but we were admiring your wheels from over near the RVs.
 

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Discussion Starter · #19 ·
Hey whats up. I knew I recognized you from somewhere. I had seen a picture of you at Cutter Motors; a picture that Jon Shafer posted. It was only till I read this post that I now recognize you. Sorry I didnt get a chance to meet you. Perhaps next time and thanks for the compliment.

BTW that was my car near the entrance. Silver on Red.
 

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How did you do?

What class did you run, N or MS?

Have any results from yesterday? It will take 2 months before they get it on the LA BMW CCA site (if ever) :dunno:
 
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