What Tyre pressure in Semi Slicks

TonyC · June 09, 2007, 05:25:24 PM

Quote from: antnicukI have started at 28 psi cold pressure. It was a second hand set i was kindly given by Matt. There isnt a lot of tread but just enough to get to the ring and back next week...... hopefully

Just playing a little bit on the road they didnt feel as good as i was hoping but they be more to do with my expectations. I had eagle F1\'s which i have always loved. Maybe i\'m not getting them warm enough. I will play with pressures a little but i\'m reluctant to play with the camber as i will be back to road tyres when i come home.

Just a little comment on this, it may be that you didn\'t get them warm enough, but also these tyres do not age very well. After a number of heat cycles the rubber goes off and they are never as grippy as they were when new. They also go off if left exposed to sunlight for a prolonged period of time. It may be that they have gone off a bit - they will need a bit more work to get warm and they won\'t have the overal bite of a new set, but they should still be better than road tyrs once warmed up. Just watch the damp if the tread depth is low!

alexb · June 13, 2007, 10:13:15 PM

Well, thanks for the advice guys, I ran 26psi today at Snetterton and the R888\'s performed brilliantly, bags and bags of grip and they don\'t seem to have worn much either. Overall really happy

Cheers,
Alex

20B_boy · June 13, 2007, 10:19:49 PM

What did they get to hot Alex out of interest? Did you try them at different pressures for comparison? 1 or 2 psi can give pretty different feel!

TonyC · June 13, 2007, 10:42:48 PM

Glad I could point you in the right direction. I\'ll be racing on the R888s as well. (championship does not allow slicks)

Quote from: alexbWell, thanks for the advice guys, I ran 26psi today at Snetterton and the R888\'s performed brilliantly, bags and bags of grip and they don\'t seem to have worn much either. Overall really happy

Cheers,
Alex

alexb · June 13, 2007, 10:45:34 PM

When I remembered to check them (admittedly a few minutes after pulling in to the pits) they were about 30-31. It was an evening event with two groups each doing 2x25 minute sessions so didn\'t have much time to experiment, will try different pressures next time though - I\'ve got the trackday bug

20B_boy · June 13, 2007, 10:47:29 PM

Quote from: alexbI\'ve got the trackday bug

Good stuff mate, its where they belong

alexb · June 13, 2007, 10:50:01 PM

indeed. Although will have to resolve some high intake and oil temps for next time (but that\'s a whole new thread

).

Cheers,
Alex

20B_boy · June 13, 2007, 10:56:37 PM

Thats the down side - u start realising theres much that probably needs replacing after 10-15 years - and that there are certainly areas you could improve the car in for the track :Thumbsup!

royal · June 16, 2007, 10:10:49 AM

Very useful thread for me as well. I\'ve been running the tyres at too high a pressure. Probably made them wear quicker. Need some new ones now

antnicuk · June 19, 2007, 10:25:53 AM

just got back from the ring, (superb, but i will save that for another thread)

I stuck with 26 psi cold and they were great, i didnt drive particularly hard but the amount of grip was something i have never experienced in my car before.

were is a good place to get these tyres from?, (R888s)

royal · June 19, 2007, 10:51:36 AM

Gary gets them at Rotaryart I think. I need to order some myself.

20B_boy · June 19, 2007, 07:29:39 PM

Quote from: antnicukjust got back from the ring, (superb, but i will save that for another thread)

Get writing mate!

Glad you had a good time, Max and I are going this weekend I think

royal · June 19, 2007, 11:50:51 PM

Just thought I\'d mention that I\'ve been running the semi-slicks at lower pressure since seeing this thread, 26 when cold, and the performance is amazing. Wish I\'d realised ages ago!

jetpilot · June 20, 2007, 12:53:29 PM

How many miles would you expect to get out a of set of these, assuming you did a pretty much even split between track days and road miles??

Mart160plus · June 22, 2007, 10:24:05 PM

Quote from: antnicukjust got back from the ring, (superb, but i will save that for another thread)

I stuck with 26 psi cold and they were great, i didnt drive particularly hard but the amount of grip was something i have never experienced in my car before.

were is a good place to get these tyres from?, (R888s)

Jeez, glad somebody else asked.

Anyway, got my Toyos from Clive and Dunlop DZ02 for the front online, very useful thread re: pressures, testing at the ring in two weeks. With the new monoflex on too. Should be a whole new World of roadholding.