mcmmotorsports Posted May 20, 2009 Share Posted May 20, 2009 Okay, well maybe not yet, but they will be. Here are my R888's after 11 heat cycles recently flipped ready for Barber next week. Quote Link to comment Share on other sites More sharing options...
Big Dog Posted May 20, 2009 Share Posted May 20, 2009 Holy cow, it looks to me like they need a haircut. Jim Quote Link to comment Share on other sites More sharing options...
Norman#99 Posted May 20, 2009 Share Posted May 20, 2009 Hey Jim Foxx, Since most of your miles are off the track and on the grass, you should get a lot more heat cycles out of the 888's than most others! OK, now I have insulted the RM boys with their body work, Jim in SoCal/AZ with his expert baja driving and still managing to win or at least a podium. I should be pretty wide open for some abuse. 115 days to MMP Quote Link to comment Share on other sites More sharing options...
944-Spec#94 Posted May 20, 2009 Share Posted May 20, 2009 I have 16 heat cycles on my 2nd set of R888's. They still seem ok. I will get 20 from these as I have a test day in August I will run them at. I do not know how good they will be then, but for a test day they will last. Ha I will make them last. I will say that what seems to have helped going from 12-14 heat cycles to 16 is less camber. As Toyo stated it seems to put more even heat over tire width increasing both overall life and consistency during a run. Truthfully if I can get 20 useable fast heat cycles from the R888 I will consider it "acceptable" for our use. Not great, but acceptable. I used to get 24-28 out of RA-1's so losing a day or two is not great, but is manageble. Getting only 12-14 is just not acceptable in a budget class. Quote Link to comment Share on other sites More sharing options...
mcmmotorsports Posted May 20, 2009 Author Share Posted May 20, 2009 I have 16 heat cycles on my 2nd set of R888's. They still seem ok. I will get 20 from these as I have a test day in August I will run them at. I do not know how good they will be then, but for a test day they will last. Ha I will make them last. I will say that what seems to have helped going from 12-14 heat cycles to 16 is less camber. As Toyo stated it seems to put more even heat over tire width increasing both overall life and consistency during a run. Truthfully if I can get 20 useable fast heat cycles from the R888 I will consider it "acceptable" for our use. Not great, but acceptable. I used to get 24-28 out of RA-1's so losing a day or two is not great, but is manageble. Getting only 12-14 is just not acceptable in a budget class. 20 heat cycles will be acceptable for me too. I had taken a 1/2 of degree of camber out when I made the switch back in February and that very well could have been the secret all along. We shall see. Quote Link to comment Share on other sites More sharing options...
944-Spec#94 Posted May 20, 2009 Share Posted May 20, 2009 Yep I took out just under 1/2 degree. Also I have been running pressures in the upper 30's lower 40's. Just about 2 psi higher than for RA-1s. One concern has been about edge wear, but despite rolling over the edge the tire seems to be fine. The wear indicator triangle is all gone, but I have seen no issue with that so far. Based on you picture you seem to be getting the same edge wear. I am actually looking forward to using the R888 at Natinoals. Despite their life being less than the RA-1's I think they will be a bit faster there due to the nature of the circuit. I think what will also help is not needing to "unlearn" the sliding technique for the RA-1. At my local track PIR I have so many laps of pitch slide and catch that it is hard to proper unlearn that for the R888. At Miller I never developed a ture pitch and catch style so I feel I will be better able to the R888 to its potential there. Plus I am not sure if pitch and catch would work well there in first place given how many high speed turns there are. Quote Link to comment Share on other sites More sharing options...
Litespeeds Posted May 22, 2009 Share Posted May 22, 2009 So what kinds of camber are you guys running front and rear? I have -3 front and -2.5 rear. Since I am at it, my toe is total 1/16" out front and 1/16" in rear. I have a question for you guys in regards to adjusting the camber on the camber plates. My tech told me that if I adjust the camber by 1 degree, my toe either moves in or out by a total of 1/4". For those that adjust their camber at the track, what do you do about the toe? Quote Link to comment Share on other sites More sharing options...
944-Spec#94 Posted May 22, 2009 Share Posted May 22, 2009 So what kinds of camber are you guys running front and rear? I have -3 front and -2.5 rear. Since I am at it, my toe is total 1/16" out front and 1/16" in rear. I have a question for you guys in regards to adjusting the camber on the camber plates. My tech told me that if I adjust the camber by 1 degree, my toe either moves in or out by a total of 1/4". For those that adjust their camber at the track, what do you do about the toe? I was -3.5 F and -2.5 R - Went to -3.1 F and -2.1R Small changes in front camber does impact toe, but not very much. Even so front toe is easy to reset with a couple tape measures. Rear camber impacts toe as well, but it is much harder to dial that in so I only mess with rear camber at home when I have time to fully string the car and measure it properly. Quote Link to comment Share on other sites More sharing options...
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