Slick tyres for track.

Hi.

Does anyone know what size is required in slick tyres form, that fits the standard 205 50 16?

Slicks I have seen so far have very strange sizes to them.

Any advice would be great. It's about time some speed was picked up on track and slicks must be the way forward.

A dedicated semi slick like a Toyo 888 for track days work very well.

Hi mag.
Yes I am aware of the semi slicks like r888's but I'm looking to see what the size is when going to slicks.

For some reason the size measurements change when going to slicks and I have no idea what size I would need.

Thanks.
Darren.

I have only ever seen one coupe on track with slicks and that was in a day time temperature of 40 odd in full sun in the middle of August in France.

The car had to be jacked up in the air as soon as it came into the pits,as not to mould a flat spot on the tyre.

I cant see slicks being practical on a coupe on a uk track day.

They are cheap compared to semi slicks and an excuse to go faster...lol

This converter should help:

http://www.cargister.com/calculator-race-tires

Just be very careful about oil starvation when using slicks. I know I've been out of the Coupe scene for sometime, and the standard baffles seem to do a good job but slicks will pull a higher g of course. I know a lot of cars (including Caterhams with wet sumps) experience issues in long corners like Gerrards at Mallory, resulting in buggered engines.
If the Coupes can cope and you keep an eye on the extra wear your bushes will encounter then cheap slicks are a great way of reducing lap times for minimal cost.

Ahhh. I never thought about oil starvation with slicks. Is this an issue with the coupe?

If you brake hard the oil pressure guage can suggest the pressure is dropping due to oil surge.
But I've never seen mine drop on hard cornering.

The stock sump is very well baffled from production.

Have u tried slicks jonny?

Jonnybravo. Have you run slicks before at donnington for example?

I can potentially get a full set at a good price so seriously debating wether to give them a whirl at the moment.

If all was to go well then maybe start polybushing too.

Is there a diverter valve or some sort of mod as I know my brother had one fitted to his m3 when he went to slicks.

Thanks again.

Never ran full slicks,ad08 on back and Dunlop full hard compound on front.

A bit fruity for first lap trying to get heat in them.

Rears don't get hot enough to warrant slicks and makes the back end unpredictable which doesn't suit my driving style.

Hmmm. That may be an idea. I am already running semi slicks too. Maybe just put full slicks up front.

The turn in and steering response is brilliant with slicks.

Until you've experienced them its difficult to describe the transformation.
Just remember to take your time for first few laps as I was getting wheelspin in 4th gear.

Yeah my brother says the same. He was running semi's on his m3 then moved to slicks and he says the difference is incredible.

He had to put a diverter valve to his sump in his due to the extra g forces and oil starvation.

Anybody else run full slicks on track? Opinions?

Yes, full slicks make huge difference, however on rear end you still may use semi, but if you have good sense about your car and if it suit your style - full slick rear too.....pressure above 2bar when cold, depending on track and weight of the car sometimes 2.5 may be better.....
And no matter how much you think that wide slicks will affect your top speed - get and fit as wide as possible tyres.....

I have a set of 'cut' slicks that might work well as fronts in conjunction with your rear semi slicks, for what it's worth they measure up 200mm from tread edge to tread edge.

I bought them used but never got round to actually using them, there is a few reviews floating around.





These are quite cheap new, Deamon Tweeks sell them
If there is interest in buying mine cheap, I'l make a for sale thread.

I'm interested. How much would you be looking for them?

A month ago I drove my 16VT with 4 full slicks (235/610/17) at the Serres Circuit in Greece. 2 of them were DUNLOP and the other 2 were YOKOHAMA A005. I prefer the Yokohamas but they are more difficult to find.

They are far better than any semi slick tyre I have used before (R888, Advan A048, Federal RSR) but they needed 3-4 laps to become sticky and to provide enough grip. Also according to me their life is not very long (300km if driving on the limit), maybe that's because Coupe is a bit heavy.

According to the oil pressure gauge on the dash there was no oil starvation during cornering or braking but who knows...?!