R888 Pressures
07-19-2008, 09:22 AM
#17
- there is no way 40+ works - i have tried it even after the tires were scrubbed in and you lose major grip levels - at these levels i was missing apexes by feet not inches - that is how i found that even lower tempts might be better (i.e. 34/36 versus 36/38) as it was just easier to place the car on the apexes at speed
- try 34/36 and see what you think
07-19-2008, 01:53 PM
#18
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But my day was cut a little short in the GT3 - got the meatball in an afternoon session when a hydraulic fitting came loose and blew fluid all over the place. Managed to get it fixed and limped home.
Also, we had our X19 race car out there and it was a hoot. Thing was running great until the nut holding the crank pulley on came off (while I was driving - man I was just breaking every car I jumped into
) causing the engine to overheat. Oh well, otherwise a successful test and what a difference from the GT3 - touch the brakes too much and you're toast....need to keep that little thing moving through the corners. Fred, you'll love the rcomps. See some of you guys next month for the PCA event.
07-19-2008, 02:21 PM
#20
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cj google track master racing, northern ca racing club, pca golden gate region, unlimited laps.
Mike u know I don't miss events. But the gearbox is out for LSD.
Mike u know I don't miss events. But the gearbox is out for LSD.
07-19-2008, 02:28 PM
#21
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http://www.motorsportreg.com/
Also check the TH site (they have a calendar) and some of the other clubs around here - Northern California Racing Club, Track Masters Racing, Hooked on Driving, GGR-PCA, Golden Gate Lotus Club. I'm sure there are more oppy's and the other RListers can chime in if I've missed a few of the local organizations. But these are the groups I've run with.
Let us know your plans so we can be sure to meet up. You'll love the tracks out here - LS and SP are obviously classic, and TH and Buttonwillow are a blast as well.
07-19-2008, 02:31 PM
#22
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Ahh yes, LSD. Which route did you decide to take and who's doing the work? I'm sure I'll need one soon.
07-19-2008, 02:37 PM
#23
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07-19-2008, 06:29 PM
#24
- on my 997gt3 with 19s, i like 35f/37r or even 34f/36r for the r888s
- there is no way 40+ works - i have tried it even after the tires were scrubbed in and you lose major grip levels - at these levels i was missing apexes by feet not inches - that is how i found that even lower tempts might be better (i.e. 34/36 versus 36/38) as it was just easier to place the car on the apexes at speed
- try 34/36 and see what you think
- there is no way 40+ works - i have tried it even after the tires were scrubbed in and you lose major grip levels - at these levels i was missing apexes by feet not inches - that is how i found that even lower tempts might be better (i.e. 34/36 versus 36/38) as it was just easier to place the car on the apexes at speed
- try 34/36 and see what you think
I did notice that when you get real fast and load on the laps, the tires to cook rather fast and the grip level dropps off a lot :/
BTW for people who drive occasionally on street, what pressure do you run, the hot temp pressure?
07-19-2008, 07:23 PM
#25
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In the Spec Boxster I've tried eveything from 45 down to 34 hot. We had settled on 38 hot for awhile but recently I'm liking 34/36.
Of note is how these tires perform on their very first session. Have any of you noticed how sticky they are for the first few laps? We do our qualifying and time trials in a quick 3 lap format and since we're limited to one set per weekend we qualify/TT on a new, cold set. Using pressures of 31 or 32 cold I've found the tires are a full second quicker for those first few laps than they are the next time out. And yes they do get more slippery as the race goes on and the tires heat up....
Of note is how these tires perform on their very first session. Have any of you noticed how sticky they are for the first few laps? We do our qualifying and time trials in a quick 3 lap format and since we're limited to one set per weekend we qualify/TT on a new, cold set. Using pressures of 31 or 32 cold I've found the tires are a full second quicker for those first few laps than they are the next time out. And yes they do get more slippery as the race goes on and the tires heat up....
07-19-2008, 08:29 PM
#26
In the Spec Boxster I've tried eveything from 45 down to 34 hot. We had settled on 38 hot for awhile but recently I'm liking 34/36.
Of note is how these tires perform on their very first session. Have any of you noticed how sticky they are for the first few laps? We do our qualifying and time trials in a quick 3 lap format and since we're limited to one set per weekend we qualify/TT on a new, cold set. Using pressures of 31 or 32 cold I've found the tires are a full second quicker for those first few laps than they are the next time out. And yes they do get more slippery as the race goes on and the tires heat up....
Of note is how these tires perform on their very first session. Have any of you noticed how sticky they are for the first few laps? We do our qualifying and time trials in a quick 3 lap format and since we're limited to one set per weekend we qualify/TT on a new, cold set. Using pressures of 31 or 32 cold I've found the tires are a full second quicker for those first few laps than they are the next time out. And yes they do get more slippery as the race goes on and the tires heat up....
Next up i'm going to try NT01's, only thing is I love the sizes of the R888's, 335;s in rear and I have monsterous grip in my GT2 with no issues, I wonder if 315's will act the same yet be a bit lighter, hmm.
07-20-2008, 01:34 AM
#27
07-20-2008, 02:09 AM
#28
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In the Spec Boxster I've tried eveything from 45 down to 34 hot. We had settled on 38 hot for awhile but recently I'm liking 34/36.
Of note is how these tires perform on their very first session. Have any of you noticed how sticky they are for the first few laps? We do our qualifying and time trials in a quick 3 lap format and since we're limited to one set per weekend we qualify/TT on a new, cold set. Using pressures of 31 or 32 cold I've found the tires are a full second quicker for those first few laps than they are the next time out. And yes they do get more slippery as the race goes on and the tires heat up....
Of note is how these tires perform on their very first session. Have any of you noticed how sticky they are for the first few laps? We do our qualifying and time trials in a quick 3 lap format and since we're limited to one set per weekend we qualify/TT on a new, cold set. Using pressures of 31 or 32 cold I've found the tires are a full second quicker for those first few laps than they are the next time out. And yes they do get more slippery as the race goes on and the tires heat up....
also as they age to less then 3/32", the grip would really deteriorate and also induce mucho push, quite the opposite than RA1.
07-20-2008, 06:25 AM
#29
Three Wheelin'
Frankly, I no longer rate 888s on the GT3 having run a set of cups. I find they overheat at the rear a lot quicker than the cups (although warm up quicker) and as I said before, if the track is hot it's even worse (which I'd expect to be more of a problem for you guys in the sunny USA than here!). Maybe good for autocross as they don't take so long to warm up, and also not too bad in the wet (as long as no standing water) but I'd much prefer to be on cups.
