rtosborne Posted October 2, 2013 Share Posted October 2, 2013 I had a tire on the drivers front delaminate (internally the belts separate from the tread) at Road Atlana this weekend. Tire was an RA1 on a 2000 Civic Si prepped to ITS/HC spec. Camber around -3.25 Has anyone else had a problem with tires doing this? What pressures are people running on RA1s? Mine may have been a little high at 42. Thanks for the info. Rory Quote Link to comment Share on other sites More sharing options...
Karl Posted October 2, 2013 Share Posted October 2, 2013 That is the first ra-1 delamination I have heard of, and while that tire pressure is not ideal it should not be a problem either. Quote Link to comment Share on other sites More sharing options...
philstireservice Posted October 2, 2013 Share Posted October 2, 2013 To start what is the date code on the tire? Please post a pic please if you can. Quote Link to comment Share on other sites More sharing options...
ILIKETODRIVE Posted October 2, 2013 Share Posted October 2, 2013 To start what is the date code on the tire? Please post a pic please if you can. This. Also number of heat cycles on the tire. I believe LF would see the most amount of abuse at RA, correct? 42psi when you came off track hot or starting cold? If that is "hot" pressure it was probably rolling around 44+ psi while actually out on track. Even still, this is also the first time I've read about an RA1 doing this. Not doubting or questioning, just curious because I run hand-me-down RA1s all the time. Quote Link to comment Share on other sites More sharing options...
TowDawg Posted October 2, 2013 Share Posted October 2, 2013 I haven't ever run RA1's, but I had both of the front R6's on my Viper separate the main tread from the sidewall at RA (inside edge of passenger side and outside edge of driver's side). Neither one was worn all THAT bad, but you could see the separation and it was just a "squishy" area between the two pieces. They did have quite a few heat cycles on them though. Luckily, I noticed it after the run when I was back in the pits, and they didn't "let go" out on the track. Quote Link to comment Share on other sites More sharing options...
rtosborne Posted October 3, 2013 Author Share Posted October 3, 2013 Curiously, this is the second tire I have had this happen with on this car. The other was an older Hankook when the car was still essentially stock. Not sure how to post an image but what I think is the date code is 97V2207. Sound right? What's the date of manufacture then? I'm not exactly sure of heat cycles. These were take offs when SCCA changes SM tire. I believe they had only been used once in the wet before I got them. I've put no more than 10 short heat cycles on them. Also, what are others running for front and rear pressures with RA1s? Thanks. Quote Link to comment Share on other sites More sharing options...
rtosborne Posted October 3, 2013 Author Share Posted October 3, 2013 Trying to post images. Rory Quote Link to comment Share on other sites More sharing options...
kbrew8991 Posted October 3, 2013 Share Posted October 3, 2013 Trying to post images. Rory fixed - hope that helps. Looks like a broken belt somehow. 22nd week of 2007 date code. Quote Link to comment Share on other sites More sharing options...
rtosborne Posted October 3, 2013 Author Share Posted October 3, 2013 How did you do that Ken? Yeah, I agree with broken belt. I guess delamination was not really accurate. I was afraid that was the date code. I was under the impression the tires were much newer since when I got them they had only one session on them. My guess is the person I got them from had been keeping them for wets/inters which is why they had so much tread. I have a set in my garage that I've had since new that are about that same age but have quit using because they are so old. Plus they have 28 heat cycles on them :} Well, I guess that at least supplies a common theme. Both the tires that failed where pretty old. Over 5 years in both cases. Guess I need to put tires in the budget for next year. Quote Link to comment Share on other sites More sharing options...
kbrew8991 Posted October 3, 2013 Share Posted October 3, 2013 needed to copy the link to just the image itself (ends in .jpg in this case) instead of the link to the overall page Quote Link to comment Share on other sites More sharing options...
AZELISE Posted October 3, 2013 Share Posted October 3, 2013 6+ year old R compound tires.... Not a good idea IMHO. Quote Link to comment Share on other sites More sharing options...
rtosborne Posted October 3, 2013 Author Share Posted October 3, 2013 I'll second that. If I had realized they were that old they would not have been on the car. Sounds like they are autocross tires now! Again, what pressures are folks running? Thanks Quote Link to comment Share on other sites More sharing options...
AZELISE Posted October 3, 2013 Share Posted October 3, 2013 I like about 38 hot. Quote Link to comment Share on other sites More sharing options...
rtosborne Posted October 3, 2013 Author Share Posted October 3, 2013 And Ken, I got images to show but got thumbnail size. Would you mind posting the actual tag you put so I can see what I did wrong. Thanks, Quote Link to comment Share on other sites More sharing options...
kbrew8991 Posted October 3, 2013 Share Posted October 3, 2013 might've just right clicked in the wrong one or something? here's an ex: {img}http://www.chariotparts.com/data/storage/attachments/7932623ef965c9a3b23d87294a13ce65.JPG{/img} square brackets changed to curly to allow it to show Quote Link to comment Share on other sites More sharing options...
rtosborne Posted October 3, 2013 Author Share Posted October 3, 2013 Thanks Ken. I thought that was the path I used but it put the small pictures. I will have to play with it some more Quote Link to comment Share on other sites More sharing options...
ILIKETODRIVE Posted October 3, 2013 Share Posted October 3, 2013 Yup, agreed with all of the above. They're from 2007. About 37-38 hot. Yadeyadeyada. Quote Link to comment Share on other sites More sharing options...
philstireservice Posted October 3, 2013 Share Posted October 3, 2013 Old tires are great candidates for broken belts. Tires pressures should be set by using a tire pyrometer!!! Quote Link to comment Share on other sites More sharing options...
rtosborne Posted October 4, 2013 Author Share Posted October 4, 2013 Yeah, gotta check the manufacture dates of takeoff/free tires. Heck, I might even need to buy some new tires Unfortunately the event schedule and my lack of help at the track did not allow me to get any temps that would have been meaningful. I clearly needed a better starting point and I should have that now. I hope the next time at the track will allow gathering more empirical data. Thanks for all the feedback. I hope this info will help some others avoid similar issues. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.