Ride Heights

[shimmy]

heh, shall I just give up ?

OK its a reasonably fair point but having played with tyre pressures in the past (albeit different cars) I can't say I've noticed a huge amount of difference.

In fairness I do check pressures in the summer as bone dry trackdays tend to heat things up nicely.

What pressures (hot) would you recommend ?

On the CSl tyre pressures will make a massive difference, more than suspension and nearly as much as geo.

If you aim for 32 HOT you won go far wrong at first then adjust down as you feel the ride altering. Like Alex says, starting around 28 cold then you will
Need to let out 2-3 more psi to get them 32 hot immediately after a good session

I am sure with assume pyro advice you could fine tune the pressures down to optimum for each corner of the car on each track.

[uncle benz]

I start at 26 psi cold, with Toyo R888's

Usually end up 30ish hot.

[shimmy]

I start at 26 psi cold, with Toyo R888's

Usually end up 30ish hot.

So do I but just need to be a bit careful on running low pressures too agressively on 19 inch tyres

[uncle benz]

I can't afford 19's.

[shimmy]

I can't afford 19's.

I'd have though Titan was keeping you in sheepskin slippers:thumbs:

[uncle benz]

I have a nasty AMG habit that's keeping me poor.

I'd like to talk about it, but I've started crying already...

[titan]

Believe me, BIG difference on E46 M3/CSL. Cups are quite sensitive to pressures.

Hot I run 30ish front 32ish rear.

Odd, shouldn't you run a higher pressure on the wheels that support the engine weight. 32 front, 30 rear ?

[glendog74]

On track I run:

Fronts 31/32 hot

Rear 30/31 hot

this normally equates to a cold starting temp of around 26 during the warmer months.

[mattCSLnut]

I have a nasty AMG habit that's keeping me poor.

I'd like to talk about it, but I've started crying already...

There, there :smt056 we understand :whistle:

http://www.youtube.com/watch?v=5Nq4xyHQb7o&feature=related

[shimmy]

Odd, shouldn't you run a higher pressure on the wheels that support the engine weight. 32 front, 30 rear ?

No not necessarily. Don't forget the CsL has near perfect weight distribution.

You run pressures that give you the best grip levels and balance for your car.

Pyro tests at Snett for me last year showed that hot pressures should be around 26RL, 29RR, 31FL, 33FR although my camber wasn't perfect so these may have altered slightly when adjusted.

[_Nathan_]

"Don't forget the CsL has near perfect weight distribution"

:bigcry:

26 hot rear left seems low?

[shimmy]

"Don't forget the CsL has near perfect weight distribution"

:bigcry:

26 hot rear left seems low?

Very low I agree and I was loathed to go that low, but it worked and gave the right temp across the tyre. Snett does work that side very hard. Well the old track used to.

[TANKSLAPPER]

Copied from Michelin website

Note: Michelin ® Pilot® Sport Cup tires are designed to operate at pressures ranging from 32 psi to 36 psi hot. A cold pressure of around 25 psi (front) and 28 psi (rear) should be a good starting point, which can then be fine-tuned to your car’s setup and your driving style. You should never go below 20 psi cold, to avoid any risk of bead unseating.

T$

[AlexGTT]

Odd, shouldn't you run a higher pressure on the wheels that support the engine weight. 32 front, 30 rear ?

Not necessarily. Remember the fronts load up and heat up quickly in the braking zones, more so than rears.