The Triumph Dolomite Club - Discussion Forum

The Number One Club for owners of Triumph's range of small saloons from the 1960s and 1970s.
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 Post subject: Racing Tyres on Sprint
PostPosted: Thu Aug 17, 2017 4:39 pm 
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Hi

I am going to race a Dolomite Sprint at the Portimao Legends Race.

I have to use CR65 L section tyres I'm going to fit the http://www.longstonetyres.co.uk/page/45 ... acing.html

Does anyone have any knowledge about what pressure suits a Dolomite Sprint?


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PostPosted: Fri Aug 18, 2017 10:34 am 
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Location: The Old Asylum
A slight aside but is this meeting part of the Algarve Classic Festival? I should be going to this so it would be nice to see a Sprint on the track there and hopefully get some good photos too. I think we have quite a few cars going in our race truck already but may have room if you needed help with transport.

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1961 Chevrolet Corvair Greenbrier
1980 Dolomite Sprint project using brand new shell
1993 Mazda Eunos Roadster JDM S-Special Type II
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PostPosted: Mon Aug 21, 2017 12:44 am 
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The class I race in in NZ does not restrict me to 'classic' race tyres but I use Dunlop 03G race tyres, with stiff sidewalls and 28psi in the front and 25 in the rear with the inner side pressure 0.5psi lower (depending on circuit rotation) . I'd ask your supplier for a guide to at least start with. Presume you'll have some opportunity to test the car / tyres at another circuit local to you beforehand so you can sort tyre pressures out and scrub the tyres in?


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PostPosted: Thu Aug 24, 2017 9:27 am 
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Quote:
A slight aside but is this meeting part of the Algarve Classic Festival?
Yep. that's the one. I raced a TR2 there some years ago with the same mate who is sharing my Dolomite this year https://www.youtube.com/watch?v=wWPRxT9 ... 1D5b0YNmyL

It's a great track


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PostPosted: Thu Aug 24, 2017 9:30 am 
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Quote:
The class I race in in NZ does not restrict me to 'classic' race tyres but I use Dunlop 03G race tyres, with stiff sidewalls and 28psi in the front and 25 in the rear with the inner side pressure 0.5psi lower (depending on circuit rotation) . I'd ask your supplier for a guide to at least start with. Presume you'll have some opportunity to test the car / tyres at another circuit local to you beforehand so you can sort tyre pressures out and scrub the tyres in?
What i will be using will be very different. I'm on Dunlop L section crossply CR65 tyres. I have done some testing at 30 and they were lovely, but weather that can handle 2 hours is another question. They are so much more fun that radial. I ran these before http://www.longstonetyres.co.uk/page/16 ... -tb15.html they were amazing. The lap times would have been much better, but the crossply tyres are so much more fun.


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PostPosted: Sat Oct 14, 2017 4:17 pm 
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Run them at, LF 24, RF 25, LR 25, RR 26, they should all equalise to 30/32 when hit. See you there.

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