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bigtom  
#1 Posted : Monday, November 03, 2014 11:01:40 AM(UTC)
bigtom

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what tire pressures do you see working well. In my experience a lot of the pro guys were running lower pressures and I see a lot of parking lot drifters running high pressures. Why is that?
yoshi  
#2 Posted : Tuesday, November 04, 2014 2:36:11 AM(UTC)
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I like to run 30-40psi on the front. You want ample grip and some room to toy with.

Rear runs from 30-60 for me. Depends on the tire.

Grassroots drifters tend to run high pressures do to not having enough power to spin the tires. Pros tend to run lower pressure for more grip. Sometimes super low.
bigtom  
#3 Posted : Tuesday, November 04, 2014 3:39:27 AM(UTC)
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Back when Tanner was running the yellow 240 we were running mid 20's front for grip and 30's rear.

There are a lot of grassroots guys that seem to miss out on the info even when they have good power. It would be cool to see MotoIQ cover the effects of tire pressure on drifting.
1jzGio  
#4 Posted : Tuesday, November 04, 2014 10:41:11 AM(UTC)
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I run 26 psi in my fronts and on the rears it depends on what ever tire I run in the rear. I have run at the lowest 24 psi so far and as high as 50 psi in the rears
ae86drftr  
#5 Posted : Tuesday, November 04, 2014 2:31:15 PM(UTC)
ae86drftr

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Like 1jzGio says I ran similar pressures when I was on track however I was in a "LOW" power AE86. I had 195-60-14 tires usually all around and unfortunately for me I had all of an estimated 160 HP(car dynoed at 101 without nitrous and later installed a 75 shot). I noticed that the lower pressures tended to give me more traction and the higher pressures usually made it way "easier" for me to drift.
smartbomb  
#6 Posted : Tuesday, November 11, 2014 10:06:23 AM(UTC)
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It really depends on some things, the power level, the level of prep for the car, the ability of the driver and the type of tires.

For instance I generally run anywhere from 9 to 30 psi in the rear and 20 to 32 in the front. It all just depends on the above factors.

When doing professional work for the FD teams data logging becomes very important so you can actually see at what pressure that the grip vs driveabitly starts to roll off. I also look at tire temps when determining pressures. If you can't afford data logging (no excuse, there are some really cheap solutions) then you can take segment times.

One thing to note is the pavement type at a certain track has a big influence on what is the best pressure. That's why data logging is important.

A note, many pro's run at too low pressures than optimal. They don't know how to analyze the data they get or don't measure, just copy the current rumor buzz around the pits.
nickbetz  
#7 Posted : Wednesday, November 12, 2014 2:02:09 AM(UTC)
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When I was working with some ProAm teams with Achilles Radial we found that to overcome the grip of the 123s (rear) on some of the lower powered cars 60 psi wasn't out of the question, fronts were based on drivers need, skill, track, setup, etc...
stcyclone  
#8 Posted : Monday, February 16, 2015 8:20:18 AM(UTC)
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am no pro, but here's my remarks so far.

had invo's, soft sidewall. i ran 35 Front, liked the front more when i raised it to 40 (stiffens up the sidewall?)

opposite for the rear! i was able to control the car more when i dropped it to 25psi!
tried different tires (RE050A, Dunlop Sport Maxx, some Chinese/zeetex stuff...) all perform better when starting around 25psi cold. unpredictable at the beginning but feels more controllable after it heats up; vs starting off with 35psi.

still experimenting with different tires/pressures..
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