 RE71-R AX pressures |
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| mskala |
 May 18 2018, 08:57 AM
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R  Group: Members Posts: 1,925 Joined: 2-January 03 From: Massachusetts Member No.: 79 Region Association: None 
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Does anybody run the RE71-R on their 914 for autocross? I couldn't find any thread
discussing pressures. Going to these from hoosier for this year. Narrow body car, so I am using 205/45/16. Based on other types of cars , search of other sites leads me to think high 20's for a light car. |
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| 914 Ranch |
May 21 2018, 04:44 PM
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Team Sharp where the 914 grow wings Group: Members Posts: 1,411 Joined: 29-January 16 From: TheNorth Shore Retreat. Deland Member No.: 19,611 Region Association: South East States |
The lighter the car the less pressure. I was using 14.5 pounds in the front and 15 pounds in the rear in a car that weighted under 1650 pounds. Kumho's 225/50/16's. The guy's I asked running this tire on 911's were running 31 psi. I think the car was over 3,000 pounds. A pyrometer is your best friend. It will help you get your tires on the ground. I take measurements in 3 places (inside, center and outside) on each tire and adjust the camber and air pressure to make the measurements all within 10° watching for scuffing on the edge of the tires.
Did all that make any sense? Joe |
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| mskala |
May 21 2018, 06:29 PM
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#3
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R Group: Members Posts: 1,925 Joined: 2-January 03 From: Massachusetts Member No.: 79 Region Association: None
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QUOTE(914 Ranch @ May 21 2018, 06:44 PM)  A pyrometer is your best friend. It will help you get your tires on the ground. I take measurements in 3 places (inside, center and outside) on each tire and adjust the camber and air pressure to make the measurements all within 10° watching for scuffing on the edge of the tires. Did all that make any sense? Joe I get you, but it's probably more than I want to do. I'm trying to use 'street' tires since I'm going to lose due to PAX anyway, and I'm getting old to be changing tires twice at events in the 90+ degree heat. I talked to my friend with a 904 kit, he sometimes uses these, and his car weighs about 1700. He went down to about 22 pounds. Yesterday I was using 27 all around, and didn't touch the arrows on the sidewalls. I should attempt lower next time. |
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Posts in this topic
mskala RE71-R AX pressures May 18 2018, 08:57 AM
wobbletop Current issue of Grass Roots Motorsports has a tir... May 18 2018, 09:56 AM mskala Great! we'll see how it goes. May 18 2018, 12:13 PM Krieger It seems like mine end up at 28 psi in the front a... May 18 2018, 06:46 PM mskala Thanks. There may be rain sunday so I might not b... May 18 2018, 10:20 PM Philip W. I thought Bridgestone was going to stop making the... May 21 2018, 09:44 AM
mskala
I thought Bridgestone was going to stop making th... May 21 2018, 06:25 PM 914 Ranch
I get you, but it's probably more than I wan... May 27 2018, 12:29 AM |
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