71 replies to this topic

[Andy_VX]

Hi all, i've got a track day on Friday, I've done a TD in an NA before but yet to take the Turbo out. I'm expecting it to be a different animal especially as it's forecast to p*ss down hard all day!  

 

I've had a proper set up carried out by Plans motorsport and it's on Nitron 46mm adjustable coil overs. 

 

These are the settings 

 

[font="'helvetica neue';"]From stiff [/font]

[font="'helvetica neue';"]Front 12 clicks [/font]

[font="'helvetica neue';"]Rear 14 clicks[/font]

 

[font="'helvetica neue';"]Ride height[/font]

 

[font="'helvetica neue';"]Front 125mm[/font]

[font="'helvetica neue';"]Rear 135mm[/font]

 

[font="'helvetica neue';"]Springs[/font]

 

[font="'helvetica neue';"]400 front[/font]

[font="'helvetica neue';"]475 rear[/font]

 

[font="'helvetica neue';"]I've heard i'm better off running the shocks softer if it's really wet, so how many clicks from hard should i be looking at and should i run lower tyre pressures? [/font][font="'helvetica neue';"]I will have a play around on the day anyway but would like a good starting point to work from.[/font]

 

[font="'helvetica neue';"]I know i will have to alter my driving style and take it easy but i'm just curious if i can improve things dramatically with set up. [/font]

 

[font="'helvetica neue';"]TIA[/font]

[bunsenburner]

Start on full soft and work your way up. Maybe 4 clicks at a time. Lap times should be monitored with each change as sometimes the car can feel like it's trying to kill you, and therefore a "bad" set up but in fact the reason for that feeling is that you're carrying much more speed. However sometimes the car is actually trying to kill you!

[mbes2]

I think at woodbridge in the wet we started with 20psi front 22psi back... soft setting on fron Gaz shocks.

 

All setting changed again once it started to dry out.

[Andy_VX]

Thanks for the advice guys, i think I'm already running a relatively soft set up but will start soft and go harder until I find something I'm happy with.

[SteveA]

just try it as is and adjust if its sliding too much. Just start off slowly and you will be fine.

[chris_uk]

You need these

[Stevie Dubyah]

Thanks for the advice guys, i think I'm already running a relatively soft set up but will start soft and go harder until I find something I'm happy with.

If there's a more innuendo laiden post on .org tonight, i'd like to see it.

[bunsenburner]

Going harder and harder for a happy ending? I don't know what you mean.

[Andy_VX]

Haha ffs I knew someone would pick up on that!

[Andy_VX]

Haha ffs I knew someone would pick up on that!

[mbes2]

Twice in one night. Good going

[siztenboots]

give the inside of the windscreen/windows a really thorough clean , misting up can be a problem. I carry a spare wiper as I have broken a few at high speed at Spa in the wet, the plastic fittings twist in the U of the wiper arm.

[Pidgeon]

Increase tyre pressures for wet track, the tyres don't heat up as they would in the dry amd the reduced contact patch is more efficient at water clearance.

[siztenboots]

plus you will have more fun , at the limit at a slower speed

 

also the wear on the car and fuel consumption is much less

 

take an umbrella and bin bag to keep all your kit dry

[chris_uk]

Increase tyre pressures for wet track, the tyres don't heat up as they would in the dry amd the reduced contact patch is more efficient at water clearance.

How is it more effective if you reduce the contact patch? Dont you want as much tyre tread to be touching the floor so the treads can maximise the water clearence? Also tyres need to be warm so you want to reduce the tyre pressure.. I dont mean so low to under inflate it mind. As that would be bad.

Edited by chris_uk, 03 November 2014 - 11:10 AM.

[Mangham54]

Higher pressures when wet, like in snow will allow the tyre to maintain its shape better and cut through the surface water and make contact with the tarmac underneath. At least that is what I have ways understood.

[siztenboots]

The force due to friction is generally independent of the contact area between the two surfaces.

[mbes2]

2 bar is 29psi

1 bar is 14psi

 

Good read, I will have a play if raining on the 16th Track day

 

http://www.tyrepal.c...mance/1867.html

[Captain Vimes]

I was under the impression that when it's cold/wet, the issue is that the tyre doesn't warm up. To get the tyre warm you can drop the pressures a little which encourages the carcass to move around. This in turn helps to warm up the tyre and increase grip. Could be rubbish but I can see the logic..

[PaulCP]

Increase tyre pressures for wet track, the tyres don't heat up as they would in the dry amd the reduced contact patch is more efficient at water clearance.

How is it more effective if you reduce the contact patch? Dont you want as much tyre tread to be touching the floor so the treads can maximise the water clearence? Also tyres need to be warm so you want to reduce the tyre pressure.. I dont mean so low to under inflate it mind. As that would be bad.

Wider tyres in the wet = less grip & bigger chance of aqua planing since the weight is distributed over a larger surface hence weight per sq mm is lower than on thinner tyres dur to higher contact area Since its not practical for most to change to thinner tyres Pigeon is suggesting you reduce the contact area by increasing tyre pressure👍 Lowering pressures to a point may work well with slicks but not tyres with tread, go too low and the centre of the tyre will not be in contact with the road http://www.tyrepal.c...mance/1867.html http://www.trackdayg...management.html

Edited by PaulCP, 03 November 2014 - 12:03 PM.