Cerbera track day advice......Please!

[tallpaulw]

I've had a Cerbera speed six for nearly a year and i've just done my first track day. I found that that the dunlop eagle F1's (i have the original alloys, not the spiders) started to loose some of their grip 10 minutes into each session. Should i use a different tyre and what psi should i be running, front and back? Also, someone told me that track day silencers with a narrower diameter than your tail pipe can damage your engine??? Compression issue? I have sports exhausts/de-catted, 60mm tail. Track cans are 40mm final diameter?? Any advice would be appreciated.

[Ireland]

I'll keep an eye on this one.

I'm booked on a track day in two weeks so I'll be interested to see what everyone suggests.

[RetroWheels]

Assuming you're running on original 16" wheels, Dunlop make the DZ02G track day tyre in 225x45x16 size, which may me worth a look.

[TT Tim]

My old tyres: Falken 451, used to 'go off' after about 10 laps of Brands, always at Graham Hill for some reason.

So, I think you'll find that this is just a symptom of some road tyres. They're not designed to be given the full beans for lap after lap.

I have just bought some DZ02G for my sprint car. Will be scrubbing them in next week at Brands.

They are phasing out the DZ02G, replacing it with the DZ03G.

Here are the '02s':



Here's the new '03s'



I got my tyres from MrTyreMotorsport

Tim

[Nefarious]

If your tyres are going off after only 10 mins and they're in reasonable condition, I'd be looking to your geo to see if its unduely loading a small portion of the tyre.

I've got one of those IR thermometers (£30 from Maplin), which, amongst its many uses, can be used to take temperatures across the tyre to spot a big temperature gradient, which would be indicative of suspension/geo issues.

[grahamn]

Hi Paul, I would go and get your car's set up checked. I had a full geo done on mine and the difference was amazing. It grips really well on track even in the wet.

[jonamacg83]

Nearly all 'standard' road tyres will overheat when used on track if the car is being driven properly. The quick solution is to lower the pressures slightly, helping the sidewall to do more 'work' and reducing the strain on the tread blocks.

The best solution as I see some people have suggested is to get a dedicated trackday tyre, or a happy medium is to get something like a Yoko A048 or Toyo R888. Between the two the Toyo's are cheaper and the general consensus is that there isnt much in perfomrance. I think the Dunlops above are road legal too, but quick pricey IIRC.

Hope it helps

Jonny

[TT Tim]

jonamacg83 said:

Nearly all 'standard' road tyres will overheat when used on track if the car is being driven properly. The quick solution is to lower the pressures slightly, helping the sidewall to do more 'work' and reducing the strain on the tread blocks.

The best solution as I see some people have suggested is to get a dedicated trackday tyre, or a happy medium is to get something like a Yoko A048 or Toyo R888. Between the two the Toyo's are cheaper and the general consensus is that there isnt much in perfomrance. I think the Dunlops above are road legal too, but quick pricey IIRC.

Hope it helps

Jonny

There are some good prices to be had on the Dunlops as they're changing tread pattern, when I was researching for tyres I came up with the following, prices are based on a car set of 17" tyres:

Road Tyres: Vredestein 17" £380.00

Track Bias #1: Toyo R888 = £580.00

Track Bias #2: Dunlop DZ02G = £488.00

So, as you can see bit of a no brainer. However the prices I have quoted on the Dunlops are only available in some sizes and some compounds, bets bet, if you're interested, then contact Mr Tyre Motorsport, for prices and availability.

HTH

Tim

[tallpaulw]

Thanks for the advice given so far. Dom from Tvr Power, who did my rebuild, has confirmed that restrictive track day silencers will not harm the engine. Thats good news!

Are these track day tyres road legal??

[jonamacg83]

Thanks for that, didnt realise they were changing tread pattern, Il look into some for myself!

Camskill are quite good value too, and fleabay always have loads of 17" trackday tyres on.

All the trackday tyres I have come across have been road legal, worth asking the seller though. They have to have a certain percentage tread I believe to be road legal. The rally drivers drive between stages on the roads with them on so they must be?!

[Byker28i]

Eagle F1's have now changed to Aysmetric with a different tread pattern than the arrow shape, but much better in the wet. I haven't noticed a problem but then I tend to work up reasonably slowly and only go for 10-20 mins then give the car a rest.

I run 24psi all around.

Edit: And no, the ACT silencers don't damage then engine. Nearly everyone who needs to quieten down uses them.

Edited by Byker28i on Tuesday 8th April 13:31