[kujo]

Originally Posted by STI_SLC

this is what im saying........
you're stating that you were losing the front so you're adding pressure to the front and lessoning the rear?
a harder tire is not going to adhere as well as one down a few lbs from that setting..
from my experience, i would be doing the following in that situation:
32 front, 34 rear.......... that is more bite in the front and less in the rear..
this is why i was commenting on the original statements posted..
please also note, that you can max your oem front end to -1.6.. until you have camber plates you should at least be at that spec.............. it will help you a bit.

A tire down a few lbs, will roll into the sidewall and you'll LOSE grip.

Of course, the fronts can be over inflated as well and that's not going to help either.

Lots of track days in 3900 lb Audi's and I'd never run more psi up front..... never. PLOWWWWWWW

I ran a little less difference when tracking 3400 lb BMWs, which is also RWD as well...

It's a fine line. I guess I'll have to wait until I get my 3395 lb STI and see what works best on that little beast.

I guess the Bottom line is..... 95% of drivers won't know the difference between a few PSIs and the majority of them won't be taking the car to the limits anyway. Properly, that is.

Drive it like you stole it......

[flatthump]

Originally Posted by kujo

No one ever talks about Tire PSI.

Are you serious!

Originally Posted by kujo

A tire down a few lbs, will roll into the sidewall and you'll LOSE grip.

Yup. But tire pressures are dependent on weight, tire, AND suspension geometry.

A lot of stock-ish STi's have much more front bite running more pressure in the front. They come from the factory with a horrible alignment and they are freakn nose heavy as hell.

I can get away with lower pressures up front because I optimized my front contact patch. I'm running about 6 degrees of castor and -3.2 degrees of camber at the track. On the RE070's, I had the front and rear pressures just about equal. 41 front hot and 40 rear hot.

Anyways, a ton of us on here do track our cars and there are literally tons of threads on the subject of tires and pressures here and on Nasioc. Threads that go into much more detail.

[STI_SLC]

ha..... nose heavy? lets get into the subject of the b5 s4....

flathump: do yourself a favor and stop running that stock tires on the track....... =)

fuuuuk... bring on the spring/summer already... (although i need a few more powder days).....

[flatthump]

Originally Posted by STI_SLC

flathump: do yourself a favor and stop running that stock tires on the track....... =)

I have an 05 STi. It came e with Potenta RE070's. They are awesome track tires. They are up in the top three trackable street tires imo.

[kujo]

Originally Posted by flatthump

Are you serious!



Yup. But tire pressures are dependent on weight, tire, AND suspension geometry.

A lot of stock-ish STi's have much more front bite running more pressure in the front. They come from the factory with a horrible alignment and they are freakn nose heavy as hell.

I can get away with lower pressures up front because I optimized my front contact patch. I'm running about 6 degrees of castor and -3.2 degrees of camber at the track. On the RE070's, I had the front and rear pressures just about equal. 41 front hot and 40 rear hot.

Anyways, a ton of us on here do track our cars and there are literally tons of threads on the subject of tires and pressures here and on Nasioc. Threads that go into much more detail.

I'm talking to the masses that run stock camber.
Sure, even with -2.0 up front, you could run even PSIs.

With -3.2 up front, you could run less up front for sure.

I know all about suspension work and how it affects things.

This was ALWAYS aimed at the masses with stock cars or close to stock cars, that complain about Understeer.

PSI can help them alot and it's seldom talked about on any of the forums I'm a member of, hence the original post.

Nose heavy... the b5 had nothing on the B6.
I tracked both. Two B6s actually.

As I said in an earlier post, this wasn't aimed at track junkies with major suspension work, for that very reason.

The chart was to educate people what to do to a stock car to reduce Understeer.

If you just added the most Neg Camber to the front and ran even pressures, and a rear sway, you'd be all set.

Any number of those things, on the list, can reduce it,

****, if you run too much neg camber, you'd have to run less psi to make up for the oversteer caused by too much neg camber up front..... etc........

oh well...... I'm done.

[STI_SLC]

ha....... i guess if you're determined to run street tires on the track then, sure they're alright....
to each his own.

and yes, kujo.... i've realized where your thread was aimed now..

Originally Posted by flatthump

I have an 05 STi. It came e with Potenta RE070's. They are awesome track tires. They are up in the top three trackable street tires imo.

[flatthump]

Originally Posted by STI_SLC

ha....... i guess if you're determined to run street tires on the track then, sure they're alright....
to each his own.

and yes, kujo.... i've realized where your thread was aimed now..

I'm still getting faster on street tires after about 200 hours of track time. Thanks.