tuna55
New Reader
3/30/09 1:10 p.m.
So this year we are much more "ready" and we even got a little time to think about things like tires. Huh. So apparently, four are desirable, and black is the best color to choose.
The car is a lot lower than last time, and has a bit more cornering stiffness. We went with Azenis this time instead of the Hankooks from last year. The car seems fairly neutral with the hankooks at 50 psi.
So, for the race, in the Azenises (that's a funny plural) what are the tire pressure recommendations?
I have heard to start with 40ish hot in the front and dial the rear to get it to rotate properly. Is this close to correct?
No?
what is?
Anyone?
Thanks
-Brian
tuna55
New Reader
3/30/09 1:11 p.m.
For those who don't know, it's a Volvo Amazon, which is RWD and ~2400 lbs. Front biased, but probably not too much. Solid rear axle, and big front swaybar.
Per Schroeder
Technical Editor/Advertising Director
3/30/09 1:20 p.m.
That's about right. I ran 42f/32 rear on my 122 when I was running R-compounds.
Per
bam2002
New Reader
3/30/09 1:27 p.m.
We ran Azenis at CMP last year on a BMW e30. Even with a good deal of camber we were eating the outer edges of the tires. I think we ended up running 42 in the front to keep the edges from rolling and 35 in the rear.
It was more a trial and error watching and adjusting based off tire wear.
So you are correct in your statment.. 40 ish and dial it in.
The big ol' Thunderterd with Azenis was happiest at 44 cold and ~48 hot. That was determined with a tire pyrometer. Of course, that was under a 3000 pound pig with a whole E36 M3pot of camber and caster, we just maxed the adjustments out. YMMV.
BTW, the tire which took the most beating was the right front. On the inside. We didn't even realize it until we checked about two months ago (yes we are slow) that the outside of the tire was perfect but the inside was worn all the way down.
Yikes, the RX7's happy place with Azenis is 30 front, 28 rear, hot.
Pressure depends some on the tire. For instance, the Hoosier A6/R6 run lower recommended pressures than the earlier tires.
Most performance tire sites will give recommended pressures.