Try this with your r888's F1 idea

[Steve]

Mate came round today & vacuumed my tyres for me & refilled with 100% nitrogen

Was thinking these will never stay on the beads but they did

Will report back end of month after trackday to see if any improvement

This should negate the massive increase in pressure as tyres get hot.

 

[rory182]

lol didn't realise they vacuumed them prior to using nitrogen but makes sense now I think about it.

 

[Steve]

Thats the problem you have at a tyre place they fill with nitrogen but already 14.5 psi or 1bar in tyre which is pointless!

 

[D4N13L]

Isnt something to do with normal air turning to moisture and you can get a water build up in the tyre?

 

[DanFreemanPhoto]

Im just about to get my 888s on my track alloys and was considering this.

I'll keep an eye out for your reports of the pressures on track

 

[ForceIndia]

No offence to anyone, but that's ott for a normal car.

 

[StevenMc29]

Air is 80ish% nitrogen?

 

[AhmedRSi]

^correct

 

[Inferno]

Did it cost you anything?

 

[DanFreemanPhoto]

No offence to anyone, but that's ott for a normal car.

Not really ott for trackday only wheels though

 

[ForceIndia]

Not really ott for trackday only wheels though

It is fella. You're not going out to shave 0.05 time off your lap time, thats not what trackdays are about.

 

[DanFreemanPhoto]

I thought the whole point of nitrogen is its more stable, and doesnt increase in pressure when its hot.
So with nitrogen you dont have to keep letting air out the tyres to keep them stable.

That's what I thought nitrogen was for anyway lol

 

[Fred@BTM]

dried air is more common in motorsport

 

[JamesS]

The spy scandal in F1 a couple of years ago revealed that certain cars were running some fairly exotic gasses in their wheels.

The F1 guys can also run two valves on their rims to allow them to purge the tyres. Whether this is allowed next year (it was supposed to be outlawed) remains to be seen.

 

[Steve]

It is fella. You're not going out to shave 0.05 time off your lap time, thats not what trackdays are about.

Warren the idea is to stop fecking about with pressures throughout the day.
Anyone who has done a trackday will soon realise after several laps the tyres go off, this is due to the moisture etc expanding causing over inflation.
With the 888's usually followed by uneven tyre wear across the width.
If this eliminates the uneven wear tyres last longer hence cheaper over the yr.
This is 100% nitrogen totally dry & tyres are vacuumed similar to an air con regas.
Air is 70% nitrogen but it's the 30% is what causes the issues.
The rs2's on my car are filled with nitrogen at the garage but they don't vac, so 1 bar is air.

 

[Fred@BTM]

you bringing the race support truck to your next raceimeantrackday steve?

 

[Steve]

So if your mates could do it for you, you wouldn't try it????

Got to be worth a go

 

[DanFreemanPhoto]

Don't places like kwik fit do this for a couple of quid per tyre?

 

[Fred@BTM]

of course i would, but what happens if you ever need to adjust pressures up?

 

[Steve]

Don't places like kwik fit do this for a couple of quid per tyre?

Your not reading this are you

If it's not vacuumed as in nothing in tyre your wasting your time!

of course i would, but what happens if you ever need to adjust pressures up?

Got that covered, also being bigger molecules it don't escape like air
Also if i set them they should be stable???

 

[DanFreemanPhoto]

Your not reading this are you

If it's not vacuumed as in nothing in tyre your wasting your time!

Well I would assume they did that before they used the nitrogen, I wouldnt expect them to just top it up with N!!

 

[Steve]

Well I would assume they did that before they used the nitrogen, I wouldnt expect them to just top it up with N!!

They don't vacuum as i found out!
The guy at the tyre place fits your tyre etc, he then adds the N.
You have 1 bar or 14psi of air already in your uninflated tyre
Waste of time

It may not work but hey ho it's worth a try, 888's £150 a pop!

 

[DanFreemanPhoto]

Ah ok, soz it's a saturday evening, not at my sharpest

 

[Fred@BTM]

are you setting them hot or cold?

depends how accurate you're talking, you'll be to the nearest psi, ie 32 or 33 or whatever


we were to tenths of psi (not on clios BTW, slightly more expensive toys)

 

[bradharding24]

Forumla one car - yes.
Tin can clio - no point.

 

[Fletcher]

I have nitrogen in my tyres, worth it for the green dust caps alone TBH