I've been doing alot of thinking on the Azenis and tire pressures. I've heard everything from 45psi in tires on the 1989 Civic Si to 35psi to 3200lbs cars.

So I was doing some thinking over the weekend since I've had 3 sets of Azenis over the past two years. My first set in January 2002 full tread (about 8mm tread depth) I ran about 36psi front (0 toe, -2.5 camber front, -2.0 rear) which according to my pyrometer was right.

Towards the middle of the tread life I noticed grip went away using those pressures and started using 38psi (same camber and toe). Again my pyrometer told the truth.

Now with 2mm of tread I have to use around 42psi in my tires.

Last year I had a set of Azenis shaved to 4/32nds and right away I had to use 38psi according to the pyrometer. They are now down to 3mm of tread and I'm up to 40psi front.

My thinking on this is that the HUGE blocks the Azenis have helps to reinforce the tire giving it a more uniform sidewall. As the blocks go away you need more and more pressure to keep the tire from rolling over, since the blocks are wearing away.

Any truth to that or do I have too much time on my hands

 

Too much time on your hands

I really have no idea though but know my pressures are perfectly consistent from start to finish. With surface variation I use between 32-35 psi hot in my 89 civic.

edit: pressures I use both on track and auto-x


Modified by ryan12321 at 11:59 PM 4/8/2004

 

You're talking about autocross pressures right?

 

interesting

wut type of pyrometer you using ?
surface, or one that penetrates the surface?

 

32-35 on a lightweight civic?

Sheesh, I'm running around 45-46 in the back on my integra to keep the edges from scrubbing like they when I was running close to stock pressures.

On road courses I was using around 37 up front, and 41-42 out back.

Guess it just comes to personal preference, but I know for autocross I was just trying to avoid rolling them over too much onto the sidewall.

Jon

 

It's a needle type probe pyrometer. So it goes into the tire.

 

I ran mine this morning at AutoX. With the temps being so gold I figured these would be beter then my race rubber. I ran 36 in front and 32 in rear. on my 91 CRX. My theory is you should run the lowest pressure which doesn't allow the tire to roll over. I have heard the Azenis do good at both ends of the spectrum but I tend to run them low.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rex_boy &raquo;</TD></TR><TR><TD CLASS="quote">My theory is you should run the lowest pressure which doesn't allow the tire to roll over.</TD></TR></TABLE>

Thats my main basis on pressures. Sometimes I even get the most grip even with a slight rollover in some places. I'm guessing this is because some turns will be good at the pressure I set to and then maybe 1 corner of the course you might roll the tire over but not enough to raise the pressures. Kinda like having more camber for turns when you dont' need it in straights if that makes any sense.

 

Good info...I found that my last track event my tires were rolling over on one sweeper corner in particular...this is something I'm going to try next event.

 

shoe polish anyone? you guys do that?