toyo r888 on 996 advice

[darronwall]

fitted a set of these on gt3 rims they have manufacturers tyre pressure but when pressing on the car want to plough on in tight corners if you give it any throttle . ifound myself having to back of the gas just after turn in to get a bit of oversteer and upset the balanceand then apply the gas again.
any advice on tyre pressures will be appreciated

[PetrolTed]

They heat up quickly and will rise about 6psi from road temperatures and balloon

I drop mine to a hot 34/36 psi. Usually takes two checks before they're settled.

[7357]

Good topic...

I am about to fit 888 to my GT3 MK1 !

First trip will be the 'Ring, any advise ?

[PetrolTed]

You'll need to get them up to temperature and then let a load of air out. Guess that could be one lap at 6/10ths ?

[Tangoed]

I run 888's on a sagaris, on the track I run them hot on 22psi. I know you have a different car and set up but 30 odd psi sounds a bit high.

[DanH]

Tangoed said:

I run 888's on a sagaris, on the track I run them hot on 22psi. I know you have a different car and set up but 30 odd psi sounds a bit high.

That is way too low on a 911. Would definitely overwork the tyres and potentially cause failure.

Toyo recommend hot temps of 36/38, although last week I was recommended lower temps of 32/34 hot on the basis they would get to that temp in no time once out on the track.

[tertius]

DanH said:

Tangoed said:

I run 888's on a sagaris, on the track I run them hot on 22psi. I know you have a different car and set up but 30 odd psi sounds a bit high.

That is way too low on a 911. Would definitely overwork the tyres and potentially cause failure.

Toyo recommend hot temps of 36/38, although last week I was recommended lower temps of 32/34 hot on the basis they would get to that temp in no time once out on the track.

That's very interesting. I might try that next time.

I was aiming for 36 hot all round last week and it seemed OK, though honestly I suspect I'm nowhere near good enough to tell the difference between a few PSI. Mine's a 993 btw, where the recommended road pressures on 17s are 36 cold front and rear.

[clubsport]

Daniel, on my 993 with 18"s I run 34 front and 37 rear, HOT......pressures are different on 888's to most other track tyres, e.g. I use 32 HOT allround on another set of Dunlop Dz02...which are more stable with tyre temps.

GT3 are a heavier car, so pressures are different, I spoke with Steve(toyoman) at simply tyres to get the 888 pressures, still some room to play though.

Edited by clubsport on Sunday 6th April 14:15

[7357]

clubsport said:

Daniel, on my 993 with 18"s I run 34 front and 37 rear, HOT......pressures are different on 888's to most other track tyres, e.g. I use 32 HOT allround on another set of Dunlop Dz02...which are more stable with tyre temps.

GT3 are a heavier car, so pressures are different, I spoke with Steve(toyoman) at simply tyres to get the 888 pressures, still some room to play though.

So what do people run there 888's at ?

[7357]

7357 said:

clubsport said:

Daniel, on my 993 with 18"s I run 34 front and 37 rear, HOT......pressures are different on 888's to most other track tyres, e.g. I use 32 HOT allround on another set of Dunlop Dz02...which are more stable with tyre temps.

GT3 are a heavier car, so pressures are different, I spoke with Steve(toyoman) at simply tyres to get the 888 pressures, still some room to play though.

So what do people run there 888's at ?

On a GT3 that is..

[clubsport]

7357 said:

7357 said:

clubsport said:

Daniel, on my 993 with 18"s I run 34 front and 37 rear, HOT......pressures are different on 888's to most other track tyres, e.g. I use 32 HOT allround on another set of Dunlop Dz02...which are more stable with tyre temps.

GT3 are a heavier car, so pressures are different, I spoke with Steve(toyoman) at simply tyres to get the 888 pressures, still some room to play though.

So what do people run there 888's at ?

Do try to keep up at the back!

DanH stated Gt3 tyre pressures earlier in the thread!

DanH said:

Tangoed said:

I run 888's on a sagaris, on the track I run them hot on 22psi. I know you have a different car and set up but 30 odd psi sounds a bit high.

That is way too low on a 911. Would definitely overwork the tyres and potentially cause failure.

Toyo recommend hot temps of 36/38, although last week I was recommended lower temps of 32/34 hot on the basis they would get to that temp in no time once out on the track.

On a GT3 that is..

[DanH]

clubsport said:

Daniel, on my 993 with 18"s I run 34 front and 37 rear, HOT......pressures are different on 888's to most other track tyres, e.g. I use 32 HOT allround on another set of Dunlop Dz02...which are more stable with tyre temps.

GT3 are a heavier car, so pressures are different, I spoke with Steve(toyoman) at simply tyres to get the 888 pressures, still some room to play though.

Edited by clubsport on Sunday 6th April 14:15

I was chatting with Steve about it this afternoon and he reckons the suggestion I got from Jon Oakley who's setting up Oakley Design Intrax 4-ways on my car should be fine. Will just have to watch and monitor.

Interestingly my cold road pressures were 5 psi too low from manufacturer recommended (32/39) and the car was horrible on the motorway - pitching around unpleasantly over bumps etc. Put them back up to what they should be and it was a 100% better. I think the softness of the tyres was stopping the suspension from doing its work properly. Not to mention the danger to inner shoulder at the rear running 5 psi under.

These dampers are brilliant. Car is better on track and road. Going to be very special once setup is complete I think (and we are nearly there).

[openpitlane]

I run R888s about 32/38 hot on trackdays (MK2GT3) and have checked them with a pyrometer and giving correct temp variance for my geo and driving on track. Not really thought about what I run them on the road.

Only way to be sure the pressures are ok are to use a pyrometer AFAIK.

[legaleagleboy]

7357

......... first trip to the Ring on R888's ??

a word of warning - colder weather may not allow you to get warmth into the tyres, especially if it is your first trip. Damp patches or wetter weather is not great in R888's - they are not the worst BUT if I was thinking of driving on the Ring I would always like the option of a set of ordinary road tyres if conditions are not optimum. Have you got 2 sets of wheels and a mate to help get them over?

Enjoy

[7357]

legaleagleboy said:

7357

......... first trip to the Ring on R888's ??

a word of warning - colder weather may not allow you to get warmth into the tyres, especially if it is your first trip. Damp patches or wetter weather is not great in R888's - they are not the worst BUT if I was thinking of driving on the Ring I would always like the option of a set of ordinary road tyres if conditions are not optimum. Have you got 2 sets of wheels and a mate to help get them over?

Enjoy

Thank you for the post, its not my first trip to the 'Ring..
I have driven the 'Ring 3 times so far in my GT3(4 times in total), all on P-Zero's.(I am not fast at all round there)

I am going on May 10th, and have no way of getting another set of wheels and tyres over. (plus don't have 2 sets)

Should I be worried about driving on the 'Ring with 888's ? Is there a way to warm them up well ?

I am not a track nut, but heard such good things about 888's think its about time I give them a try !

[jon-]

R888s like to run softer than road tyres, they have strong sidewalls.

[tertius]

7357 said:

legaleagleboy said:

7357

......... first trip to the Ring on R888's ??

a word of warning - colder weather may not allow you to get warmth into the tyres, especially if it is your first trip. Damp patches or wetter weather is not great in R888's - they are not the worst BUT if I was thinking of driving on the Ring I would always like the option of a set of ordinary road tyres if conditions are not optimum. Have you got 2 sets of wheels and a mate to help get them over?

Enjoy

Thank you for the post, its not my first trip to the 'Ring..
I have driven the 'Ring 3 times so far in my GT3(4 times in total), all on P-Zero's.(I am not fast at all round there)

I am going on May 10th, and have no way of getting another set of wheels and tyres over. (plus don't have 2 sets)

Should I be worried about driving on the 'Ring with 888's ? Is there a way to warm them up well ?

I am not a track nut, but heard such good things about 888's think its about time I give them a try !

They are very, very good indeed - I've just swapped to them from MPSCs and I would say they are as good (for my level of driving). However, when cold/damp/greasy/all three (Silverstone last Thursday for example ... ) they don't have a lot of grip. Once warmed up they are fantastic.

I'll be at the 'ring as well that weekend and honestly I would say treat it with the same level of caution you would normally, if its cold or damp then go extra easy for at least the first half lap or so.

For me driving the 'ring isn't like driving a UK track so its not about tyres at exactly the right temp or pushing on, rather its about a fantastic driving experience in a setting like no other. Of course you do push hard and you do drive fast but taking it easy on some of the trickier/slipperier corners matters not a jot.

[7357]

tertius said:

I'll be at the 'ring as well that weekend and honestly I would say treat it with the same level of caution you would normally, if its cold or damp then go extra easy for at least the first half lap or so.

You should come down with us, I have arranged this -

http://www.pistonheads.co.uk/gassing/topic.asp?h=0...

[tertius]

7357 said:

tertius said:

I'll be at the 'ring as well that weekend and honestly I would say treat it with the same level of caution you would normally, if its cold or damp then go extra easy for at least the first half lap or so.

You should come down with us, I have arranged this -

http://www.pistonheads.co.uk/gassing/topic.asp?h=0...

Thanks for the invite, however, I'm flying out for the weekend and hiring from rent-racecar.

I'll PM you my mobile - maybe we can meet up?

Dan

[7357]

tertius said:

7357 said:

tertius said:

I'll be at the 'ring as well that weekend and honestly I would say treat it with the same level of caution you would normally, if its cold or damp then go extra easy for at least the first half lap or so.

You should come down with us, I have arranged this -

http://www.pistonheads.co.uk/gassing/topic.asp?h=0...

Thanks for the invite, however, I'm flying out for the weekend and hiring from rent-racecar.

I'll PM you my mobile - maybe we can meet up?

Dan

Cool, look forward to saying "hi".

Dan