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Ducman's Avatar
 
Join Date: Jan 2005
Location: In the garage
Posts: 479
R888R pressures

Years ago I swore off R888s, tried 3 sets and couldnít get them to work and cored them out in just a few sessions. Donít know why but decided to try a set of R888R and initially like them quite bit. Got 6 track days on them this year and they still look great.

Anybody else running them? If so what pressures are you targeting? I was likely getting up to 38 hot as I recalled my r888 liked high pressure but Iím experimenting bring pressures down. I donít like the feel as much but they might be working better....conditions have been too variable to compare times outright and havenít been at a track where I could get in easily to measure temps soon enough.

Iím fitting 235/50x15 and 205/50x15 on 9Ē and 8Ē on a 2350lb car.

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Old 06-29-2020, 04:45 AM
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I prematurely wore out my first couple sets by running too much pressure. I found this and I'm getting far more miles and smiles out of them now.

https://www.toyo.co.uk/page/index/identifier/set-up-advice

I just changed my fronts at 11,000 miles after cording one due to inner alignment wear. My rears have been changed anywhere from 4k-10k depending on if they saw any road trips or if they were just punished. I tend to replace them early if I'm getting ready for a big trip or rallye.
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Old 07-01-2020, 07:59 AM
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I've used the r888 and r888r a lot on my 77 targa. I keep the hot pressure around 32psi (2.2 bar), over 35 (2.4bar) the old R888 was useless and slippery, the r888r seam to hold better at higher pressures but around 2.0-2.2 bar is what I run.

205-16"+225-16", guessing 2900 lbs with driver and 250-260hp.
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Old 07-06-2020, 12:44 AM
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Yes, I use R888R's for track days on my '74 911. I look for mid 30's hot pressures. Depending on ambient temps they start around 28 / 29 cold.
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Old 07-18-2020, 08:53 AM
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Track time drought for different reason. Back out next week hopefully to test some much lower pressures.

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Old 07-22-2020, 05:42 PM
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