New Slix - Rolling Road
Discussion
I have a set of new slix I will need to use this coming weekend. Qually looks to be wet but the race is looking to be dry. I would normally bed new slix in during qually. Couple of questions.....can you race on new slix without putting a heat cycle through them first with out damaging them ? and secondly I was thinking of carefully bringing the new tyres up to temperature on the rolling road. Anyone think using the rollers is a bad idea and if so why.
Hi Andy yes I know that, but the issue I have is qually is going to be wet so I can't run slix , I was thinking nice and gently up to temp,not blistering them. Testing is out as the race is on Saturday.
can you just race on them straight away? I always thought that drastically reduced rubber life.
can you just race on them straight away? I always thought that drastically reduced rubber life.
Edited by 77racing on Wednesday 1st October 18:09
Yep all good advise. I like to be prepared as possible as I have the interest and time to be. You can't be armed with too much information before an important race.
For any one interested and not sure.I spoke to Dunlop Motorsport dept and a leading Dunlop motorsport distributor this morning. Their advise was broadly the same. Ideally you want to put a gentle heat cycle through the tyre before you race on them. If you race on new slix they are good for the first part of the race with lap performance dropping off steadily as you go, also the tyres longevity is seriously compromised. For instance if you ran your tyres for 5 races you would only get reliable reduced performance for 3 races after with no pre race curing, that's ok if you have a good tyre budget. Cold to hot pressure will be the same from new tyres as from a used set. Both advised a hot pressure no more than 30psi although they varied quite a bit on starting pressures. Dunlop thought my start psi was ok and I like to end up at 29psi hot.
One said absolutely no to the rolling road idea the other had no problem as long as you don't over do it and start gently and build up heat, bringing tyre up to a temp short of blistering hot but just enough to cure tyre again. They suggested I use a temp gun across the width of the tyre. They both agreed that a heat cycle before was the way to go if possible to achieve longevity and consistent lap performance from the tyre, that's if you use your tyres for more than a race meeting as I do. They both said that their advise was for my set of circumstances and car and that other people and cars can vary, so seek advise tailored to you and your car was what I got from that
For any one interested and not sure.I spoke to Dunlop Motorsport dept and a leading Dunlop motorsport distributor this morning. Their advise was broadly the same. Ideally you want to put a gentle heat cycle through the tyre before you race on them. If you race on new slix they are good for the first part of the race with lap performance dropping off steadily as you go, also the tyres longevity is seriously compromised. For instance if you ran your tyres for 5 races you would only get reliable reduced performance for 3 races after with no pre race curing, that's ok if you have a good tyre budget. Cold to hot pressure will be the same from new tyres as from a used set. Both advised a hot pressure no more than 30psi although they varied quite a bit on starting pressures. Dunlop thought my start psi was ok and I like to end up at 29psi hot.
One said absolutely no to the rolling road idea the other had no problem as long as you don't over do it and start gently and build up heat, bringing tyre up to a temp short of blistering hot but just enough to cure tyre again. They suggested I use a temp gun across the width of the tyre. They both agreed that a heat cycle before was the way to go if possible to achieve longevity and consistent lap performance from the tyre, that's if you use your tyres for more than a race meeting as I do. They both said that their advise was for my set of circumstances and car and that other people and cars can vary, so seek advise tailored to you and your car was what I got from that
Graham said:
I think we've probably got a car racing with you Perry an mg midget...it did a 1:47 first time out at oulton last weekend..
as if I need any more competition 
I recon I need a dnf from one chap but on my four outings in the champ I have got 4 wins 4 fastest laps just need to do that again no pressure then. will you be down helping out ? be good to see you. Keithyboy said:
Hi Perry - I'm surprised with the advice to use a temp gun across the tyre width as that will only read the surface tyre temperature and not that deeper inside the carcass - that's why probes are the usually the preferred choice (& of course the more expensive one too!) Best of luck too
Hi KeithIt has been suggested/decided I take the surface of the tyre gently to 60 deg knowing the core will climb hence the gun, although I totally agree with you probe would be better but I don't have one so a compromise as always . The rollers might not work out but I'm willing to give it a go as I don't fancy only half a lap round combe to get any temps into tyres. If it works I will be a happy chappy. I'd say I would have no chance on a green flag lap. Andy H idea they might give two green laps in the pm because the am will be in wet conditions would be a good bonus but usually it is the other way round and only give extra green flag lap when quallied in the dry but have to race in the wet. I'll give it a go and let you know how it pans out.
yes that was a cracking race , the best I have ever driven in I think. The car is now getting very quick with our latest mods doing there part in dropping my best lap time from 1:09.9 down to 1:09.2 six straight laps in the 1:09's is a great achievement for a Tuscan round Combe. I defiantly think the car has a low 1:08 or even a 7 in it next year. That was the worst driving standards I have had to deal with culminating in car 77 been driven into and off the track. The car has too much repair work to do to get back on track in time to be out for Oulton Park which is a shame. The support for the car is amazing and I thank all the good well wishers we received in the paddock after the race. I know a lot of people were incensed by the driving standards of a certain well known car.
The tyres and my new to me 11" rims were awesome my second lap was a 1:11 I had no problem into quarry on the first lap the rollers worked for me no dought. All good advice from Dunlop Motorsport Dept but remember I didn't take them hot enough to do any damage or more importantly initiate a chemical reaction
The tyres and my new to me 11" rims were awesome my second lap was a 1:11
I had no problem into quarry on the first lap the rollers worked for me no dought. All good advice from Dunlop Motorsport Dept but remember I didn't take them hot enough to do any damage or more importantly initiate a chemical reaction 
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