Tyre temperature

[Flatjack]

I am running a car with slick YOKOHAMA No. 811 size 160/515-13 tyres and I do not think they are running at the optimum temperature so I have a question.
1 where can I find what temperature they should be run at?
And
2 if they are running to cold what is the best way to increase there running temperature?

[Neil C]

Increasing tire pressure is the easiest way to increase operating temperature. Of course, that may have unintended consequences in the handling department.

Increasing toe-in/toe out would be another way, but I wouldn't do that just to increase temp.

[THR]

Ask Yoko's what temp they should run at, only they will know wot the tire was designed for.

there are many ways to makes them hot.
camber, toe, pressures, spring stiffness, dampers.

wot are they fitted to? how heavy is it?
does it slide abuot a lot?

[Flatjack]

They are fitted to a 750 formula car it is a category run by the 750mc.
it is way under the weight that the tyres were ment for and hence them not reaching temp. the car is around 350kg.
and finally yeah it is does like to slide.

[THR]

do the tires feel hot, like Really warm when you just get out after a hard lap?
and colder on the outside?
how much tow do you run? you could always put it up 1mm and that would improve the temps.
how would you feel about using bigger springs?

[Warwick]

You need a pyro to measure tyre temp,measure in three or four places across the tread and look for a reasonbly even temp across the tread area,this will vary a bit depending on you alignment setting (eg a lot of negative camber can heat the insides a lot more)and whether they are radial or crossply,adjusting your pressure up or down doesn't always make the whole tyre run hotter,to much and just the center will heat up to little and just the shoulders.
If you go back to the start of the tech forum there are quite a few posts on tyres and temps!

[Flatjack]

THR i have not run the car for A while now so i i cant really remember how hot they get and where they are heating up.

Warwick i have been planning to get a pyro but i have not got one yet thanks for the info on where to find the info.

[Flatjack]

warwick or any one can you recomend a pyro to get?

[yelwoci]

I use one a bought from DT, Can't remember its name, but its the only cheap one that comes in a box kit with tyre and brake probe.
It works well enough, though others in the CSCC Club swear by the infrared versions that may not get into the material but are much quicker.

IanC

[yelwoci]

PS
It might be even better to spend teh money on tyres that Yoko would recommend for your power/weight.

IanC

[Flatjack]

IanC The tyres that are used in this category are a standard that everyone has to use so from that i am trying to make the best of them that i can but the are ment for a sports 2000 whith weights 500kg and has a 2L engine where the 750 racers weight around 350kg and only give about 70hp.

so from that the tyres are running well under heat i think but i need to find out how much then i can go about fixing it.

I HOPE

[Budmakesmewiser]

You could fiqure the weight of the car,the g-forces,heat of the track, humidity of the whole tire in and out,the friction between the tires and the ground,balance,the atomic properties of the materials that are being used and a whole lot more if you really want to fiqure out the exact estimate of tire wear,grip,balance,handling,all with the aid of math,if you no math and you think about all the factors present of not you can fiqure out all of everything.