360 What is best tire pressure 360 w/ F430 rims & Michelin PSS - Ferrari Life
 
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post #1 of 12 Old 01-01-2014, 04:33 PM Thread Starter
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What is best tire pressure 360 w/ F430 rims & Michelin PSS

I replaced my 18" starfish rims with F430 rims shod with Michelin Pilot Super Sports.

Back in 2004, the owner's manual listed four tires officially blessed by the Ferrari Tire Fairy ... each of the four with recommended tire pressures.

The Michelin PSS tires were not even available at the time and they are 19" not 18".

I have them at 30 psi front and rear and I have no idea if that is optimal or not. Seems ok to me, but what do I know?

Anyone have a recommendation?

Steve
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post #2 of 12 Old 01-01-2014, 04:44 PM
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I use the recomendation for the pilot sport 2 tyres of 2.2 bar front and 2.4 rear.

John.
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post #3 of 12 Old 01-01-2014, 04:58 PM Thread Starter
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In owner's manual the Michelin Pilot Sport tires had recommended pressures of 1.8 bar front and 1.9 bar rear. The PS2 tires are not listed in F360 manual.

Are you using PSS or PS2 tires on a 360 or 430?

Steve


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Originally Posted by steelej View Post
I use the recomendation for the pilot sport 2 tyres of 2.2 bar front and 2.4 rear.

John.
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post #4 of 12 Old 01-01-2014, 06:38 PM Thread Starter
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Since the owner's manual recommendations are optimal pressures for the car/tire combo when running at the extreme limits, it seems that if one were to increase those pressures a bit you would have a bit more comfortable ride and reduce the risk of wheel damage negotiating real world street hazards. You would sacrifice a bit of handling ... but one does not push the limits in daily driving. Only when tracking the car.

Any thoughts?

Steve
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post #5 of 12 Old 01-01-2014, 09:05 PM
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Steve- With F430 wheels and tires, I would run F430 pressures as a starter. Raising tire pressure makes the ride worse, not better, and handling on these cars is best at a tire pressure that keeps the whole tread on the road. Underinflated and the outer parts of the tire are more in contact. Over-inflated and the center of the tire tends to contact more.

Like John said, 32 psi F, and 35 psi R is where I would start, translated to Engish units, for an F430 with Michelin tires.

Taz
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post #6 of 12 Old 01-02-2014, 12:47 AM
 
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Steve do you find with swapping to f430 rims and tires
The car becomes very nervous at the front end over 100 mph
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post #7 of 12 Old 01-02-2014, 01:33 AM
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Which is the preferable tyre and what's the difference between the Michelin Pilot PS2 and Michelin Pilot Super Sports? The only difference on the listings seems to be the speed rating being higher on the Pilot Super Sports......

Cheers
Michael

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post #8 of 12 Old 01-02-2014, 01:54 AM
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Hi Michael, the PSS tire is a complete new designed tire while the PS2 and PS3 existed already since quite a while now. As a result, the PSS is a very modern tire produced with the latest technologies and will last much longer than any other tire while offering very good performances on wet and dry.
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post #9 of 12 Old 01-02-2014, 02:22 AM
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Hi Steve, anything between the limits of :

30psi/2.0bar - 32psi/2.2bar at the front
30psi/2.0bar - 35psi/2.4bar at the rear

is fine, the lowest having the best grip on the PSS tires. The exact pressure will more depend on your preferences and how you like to feel the car. Just one thing, I'm afraid that only a couple of psi more on the front tires will certainly not prevent wheel damage when driving fast in a pot hole. Our 225 front tires are only 35% heigh. The front wheels are sitting just 7.8 cm/3 inches above the road
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post #10 of 12 Old 01-02-2014, 04:27 AM
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Stef- Higher tire pressure will tend to make the wheels more susceptible to damage because of the stiffer wheel/tire unit. Seems like it is the fronts that have the most problems.

Taz
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post #11 of 12 Old 01-02-2014, 05:45 AM Thread Starter
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Thx for the recommendations. I will put in 32 psi front and 35 rear and go with that.

The highest speed I have had the car since swapping the rims is only 90 or 95 and was running 30 psi all around. I did not feel any nervousness or twitching. Seems just fine.

Steve
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post #12 of 12 Old 01-02-2014, 05:52 AM Thread Starter
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As Stef said, it is a newer tire and is one the current tires new Ferraris being delivered to customers.

Michelin gives a higher wear warranty on the PSS (about double) vs the PS2 and it is also less expensive.

Basically a no brainer ... the PSS tires are (IMO) the best tire available for high performance cars.

Steve


Quote:
Originally Posted by 575er View Post
Which is the preferable tyre and what's the difference between the Michelin Pilot PS2 and Michelin Pilot Super Sports? The only difference on the listings seems to be the speed rating being higher on the Pilot Super Sports......

Cheers
Michael
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