|
Post by kennedylanduk on Jul 31, 2014 12:48:33 GMT
Hello all,
I'm hoping to get some advice or experience regarding tyres.
I know that most use Sorex 28 or 32 (yellow insert) for Bashley. I bought a set of these at the recent SICC at Mendip. But by the end of SICC at SHMCC, our tyres were shot (so only 10 five minute races on each set). The weather on both days was very hot.
Is this wear rate normal? Sean's rears were especially bad.
And is there anything I can do to help keep these things good for longer?
Thanks in advance,
Tony.
|
|
|
Post by Dave Chamberlain on Jul 31, 2014 19:45:43 GMT
Did you buy 28s or 32s Tony? In hot weather 28s can wear very quickly especially if the track is "hard" on tyres anyway..
You can improve tyre wear by ensuring both camber and toe are not excessive but this is often a trade off for grip and handling.. Also a smooth driving style with less aggressive braking and excelleration helps..
However I'd also say that the recent hot weather has pushed the track temps toward the use of 36s mid late afternoon!
|
|
|
Post by kennedylanduk on Aug 1, 2014 7:36:09 GMT
I bought 32s (I remember someone saying those were generally the best choice in this part of the UK).
I was just a bit disappointed that they lasted only two race meets. Maybe I need to invest in some 36s as well (it will probably be years now before we see more hot weather like we have had recently).
|
|
ianlloyd
Lapping the Back Markers
Posts: 932
|
Post by ianlloyd on Aug 1, 2014 18:47:38 GMT
28's or 32's are the norm at Bashley. Hot weather I use 32's and not so hot 28's. 32's should last 5 or 6 meetings depending on set up of car. If you use 28's in hot weather you will knock them out very quickly maybe only getting 1 or 2 meetings out of them. At some big meetings I have used 2 sets of 28's just to be able to get the times but at Bashley you should not need to do that.
Check your set up, don't have anything set too extreme as Dave says. Front left tyre wear will always be greatest as that is the nature of track, the highest loadings on that tyre.
On Wednesday I tried a set of indoor 32's (blue inserts) and they did not work at all. Last race I used 28's and they were fine.
I would stick to 32's and 28's personally but try others if you like. They do wear out and sometimes wear out quite quickly which can become expensive although I tend to use them until the canvas shows through but by then they are a lot slower. Its a trade off between cost and performance always. New tyres will always give more grip and so be faster.
|
|
purcyp
At the Thermometer
Posts: 104
|
Post by purcyp on Aug 1, 2014 19:56:20 GMT
32 or 28s if the track temp is hot the tyres will be extremely hot so its no surprise youll go through them quicker, as lloyd said, ive used sets right down to the carcass. When i was running boosted at CWIC i was on 28's wasnt cold in doors but still had the temperature of the tyres at around 40 degrees before they touched the track, after a run i could not touch them, far too hot! but thats what you had to do, to get the times. Even if you use 36's if the temps hot enough it will chew through the tyres quick, just the way it goes, will last a bit longer but i mean 36's were for european countries where the track temp im sure is even higher. Stick with the 28's and 32's
|
|
|
Post by Jazzler on Aug 3, 2014 7:47:55 GMT
For me it's about having at least 2 set of each tyres (32's), and marking them so I knew where they were fitted to the car, e.g. FR, FL, RR, RL (Front Right, Front Left, Rear Right, Rear Left). After a meeting I would swap over FR and FL over for the next meeting, then again at the next meeting etc. This meant I would get reasonably even wear and life out of the tyres. Then after about 6 meetings or so, the front's would generally be knackered so I would (wear depending) throw away the two fronts and keep the rears as spares. Then out would come the new set of tyres and I would repeat the process say for another 6 meetings. Once set 2's front tyres were worn down to the canvas, I would then bring in the 2 rears from set 1 and put them on the front (again continuing to swap over FR and FL each meeting. Using this method it was not uncommon for me to use just 2 set's of tyre's per summer season, and I wasn't that slow with them either..
Setup wise I'd run 0 degrees of Toe, and only -1 degree of Camber (Front) and -3 (Rear), Some might argue that this is absurd for Bashley but, this worked well for me and gave me plenty of grip, turn in as well as even wear across the tyres. If I ran more camber then I would find the inside of the front tyres would wear out quickly and it wouldn't make me any faster.
In Winter or on day's where the ambient temperature was say 5c or less I'd be using 28's, with the same process.
|
|
|
Post by kennedylanduk on Aug 3, 2014 12:49:09 GMT
Thanks for all the tips. I'll have to invest in some more tyres and make sure I mark them up properly (plus keep a closer eye on them).
|
|