[pitbull666]

What tyre pressure are you guys running on the F20 with 18 MPSS?

Also am I worrying to much but always use the free pump at my local Sainsburys to pump the tyres but just been put off buy a few stories my tyre fitter has told me!

 

[Beammeup]

what sort of stories - dirty air / inaccurate readings?

 

[Dmoe]

What tyre pressure are you guys running on the F20 with 18 MPSS?

Also am I worrying to much but always use the free pump at my local Sainsburys to pump the tyres but just been put off buy a few stories my tyre fitter has told me!

If the stories are that the machine doesn't give correct pressures then you always have you TPMS to back it up. I run 2.0 bar front 2.1 bar rear.

Sent from my iPhone using Tapatalk

 

[pitbull666]

Yeah inaccurate pressure was one but yes we do have the TPMS but it would be a pain to keep having to check that while trying to set the tyre pressure!

Main one was damaging the valve!

 

[Paul CS]

I use this pressure gauge because I saw McLaren's Engineers use it during testing of the P1. I thought if that's good enough for them...

http://www.halfords.com/webapp/wcs/...goryId=255241&productId=1155123&storeId=10001

" onclick="window.open(this.href);return false;

It's brilliant. You can preset the pressures front and rear and it will bleep when you are at the correct pressure (it has a little air release tap).

I know you really want one now.

Paul

 

[pitbull666]

Paul,

So do you inflate slightly over what you want and then set it perfectly via the pressure gauge?

 

[Tooks]

I use this pressure gauge because I saw McLaren's Engineers use it during testing of the P1. I thought if that's good enough for them...

http://www.halfords.com/webapp/wcs/...goryId=255241&productId=1155123&storeId=10001

" onclick="window.open(this.href);return false;

It's brilliant. You can preset the pressures front and rear and it will bleep when you are at the correct pressure (it has a little air release tap).

I know you really want one now.

Paul

I use one of those too, great bit of kit, and the backlit display is perfect for middle aged eyes like mine!

I've got three different tyre pressure gauges somehow, but fortunately they all read the same, I think quality control and accuracy are pretty good these days.

 

[Aero]

I over inflate at the garage, then adjust pressures at home when the tyres have cooled

 

[Paul CS]

Paul,

So do you inflate slightly over what you want and then set it perfectly via the pressure gauge?

Yes. I pump up at home using a cycling track pump. Works surprisingly well. That way I know the tyres are proper cold therefore pressures perfectly set. These things are critically important to my OCD.

Paul

 

[Sustanon250]

I bought this from Argos a few years ago and it is absolutely fantastic !!!!!

http://s477.photobucket.com/user/thrustinjustin/media/CC317104-9966-4252-8C15-87624A7749BE.png.html

 

[marco_polo]

The ideal pressure is around 32 psi for best performance.

Some people over-inflate them to try to preserve the front outer shoulders, but all that does is reduce the contact patch.

For drag events like Santa Pod, you'll notice most RWD drivers temporarily lower the rears by roughly 1/4 for extra traction.

 

[pitbull666]

I bought this from Argos a few years ago and it is absolutely fantastic !!!!!

http://s477.photobucket.com/user/thrustinjustin/media/CC317104-9966-4252-8C15-87624A7749BE.png.html

Good tip just picking one up now

 

[Sustanon250]

Glad to be of service !!! I've had a few varieties of these and that's the best by miles. Just set it to , say, 32 psi and let it do its thing.

Ps - I always take it with me on long journeys , never know when it'll come in handy.

 

[br0wny]

i run 34 front and 36 rear

 

[M135iSNO]

The ideal pressure is around 32 psi for best performance.

Some people over-inflate them to try to preserve the front outer shoulders, but all that does is reduce the contact patch.

For drag events like Santa Pod, you'll notice most RWD drivers temporarily lower the rears by roughly 1/4 for extra traction.

Is traction better because the contact patch is bigger at 32psi? Has running at that lower pressure caused even wear on your rears? Will experiment more when I have my summers back on but have always noticed traction is better when they have been under inflated on the rears, including on the winters.

 

[marco_polo]

My rears wear nice and evenly with 32psi, -1.8 degrees of camber.

 

[pitbull666]

I bought this from Argos a few years ago and it is absolutely fantastic !!!!!

http://s477.photobucket.com/user/thrustinjustin/media/CC317104-9966-4252-8C15-87624A7749BE.png.html

Actually after checking this one I'm not sure it's the one you have fella! With this one you cannot preset a pressure it purely a on/off and a release.

This is the model which allows a preset pressure and only a fiver more from Amazon

http://www.amazon.co.uk/Michelin-Rapid-12262-Tyre-Inflator/dp/B001NI9XWO

" onclick="window.open(this.href);return false;

 

[Thawke]

Have 35psi all round (when warm and settled), these mornings with the freezing temperatures the way they are though when I set off and check the Tyre Pressure (religiously before every journey) they always start off at 31.9 or there abouts, then go up to 35/36 after 10-15 mins driving.

I have PaulCS's Tyre pressure reader for when pumping tyres and use the "over inflate at petrol station then adjust when at home" method.

 

[Billy_BMW]

In the minority I know, but I run 40 PSI all round. I prefer the high spring rate feel it gives.

Also use Paul's Halford tyre gauge and have been for 3 years. Saw McLaren technicians use it on Motortrends 918 vs P1 shootout. To be fair to them, I bought it before so technically...

 

[Paul CS]

40psi!

My friend, I mean this in the best possible way, but unless your car is fully loaded (5 people + luggage) all the time, that is dangerous because the contact patch is way beyond what the suspension engineers designed. Braking and handling will be way off despite it "feeling" better to you, especially if you are running summer tyres in cold temps. If you want things slightly stiffer, fit Eibach or H&R springs.

Please go back to the recommended setting if only because 1000's of engineers working full time at BMW and Michelin didn't come up with 32psi based on guess work.

Stay safe.

Paul

Ps May be you were joking?