dc2R track setup: lets share some info?

[tinkerbell]

are you bringing a pyrometer to EC on thursday? that is great!

[narada]

ahhhh no... does anybody have one?

i was gonna buy one but bought brake pads instead hahahhaha

anyway you can be a little less acurate and just judge your pressures from your tyre wear.. if you look carefully you will be able to see where the wear is.. your tyre temperatures relate directly to how much tyre you use up and where ahhaha

if you have the correct pressures, the tyre wear is always smooth... eg. on my car it wears more on the outside of the tyre and gets progressively less towards the inside... eg i need more camber

if its not progressive htere is something wrong hehehe

[Danga]

Narada,

Did you just offer to measure my tyre temps, come thursday?

Thanks Buddy :P

[narada]

yeh actually i got a great new pyrometer.. its called:

Daves Arse Holometer

cheap!

[freakie]

narada, i sent you an email about this day, no reply?

[narada]

I replied this morning!

ill reply again eheheh..

[freakie]

got it mate, ta!

Hope I can make it in time, I gotta get my car all track prepped in one nite

[narada]

one night is plenty!!.. me too hehehe

[dc2rrrr]

remember guys tyre temperatures are key! you can adjust all your settings to suit by measuring the tyre temperatures.

first of all you need to know you are running the proper pressures. this is how you can measure!

1. after running your car measure the tyre temps in three places - outside middle and inside
2. average the two outside and inside temps

if the average of the two outside temps is greater than the middle temp you are running too little pressure
if the average of the two outer temps is less than the middle you are running too much
if the average equals the middle you are running the right pressure

NOW you can adjust your settings! its all common sense!

now lets say you figured you are running the optimum tyre pressure. lets take for example the front left tyre

the temperatures are say (made up numbers)

20 - 15 - 10
out - mid - in

you are running the optimum pressures but you are using too much of the outside of the tyre. normally you can increase the negative camber or increase caster etc to balance it out. maybe stiffer springs or anti-roll bars to limit roll.

remember: the goal of set up is to get the maximum of your tyres.

what you want is the following for all four tyres

15-15-15

does this make sense to you?

Spoken by a true pro. Sticky this

[WhiteDC2]

are you bringing a pyrometer to EC on thursday? that is great!

i can bring one if you want...

[tinkerbell]

if possible, would be good for proper settings...

please do!

[Edw-R]

How much for the temp. gauge for measuring tyre?

[tinkerbell]

infra-red one = $100

temp probe stlye = $200+

[WhiteDC2]

I couldn't get hold of our infra-red laser pointer pyrometer (someone decided they needed it more and have most likely stolen it), but I did bring a Fluke DMM with a temperature probe.

After getting the tyres (Dunlop D01J 205/50R16) stable at 32psi hot, I took some measurements as soon as I could from the inside, centre and outside of the tyre.

Fronts measured ~45 deg C and varied +/- 2 deg
Rears measured ~35 deg C and varied +/- 2 deg

I really wish I had written the temps down to get some accurate data, but I was content that the tyres were keeping fairly constant temps across the surface and they felt good at 32psi. At no point did the tyres go 'off' during the 15 minute sessions once the tyres were at 32 psi. At higher pressures (~38psi) the tyres lost grip and slid.

[Vincent]

Lots of useful information here