Tyre Pressures

[MattYorke]

Sorry, I'm a forgetful teapot. Can someone remind me what the tyre pressures should be on a spyder?
Many Thanks
Matt

[shithotfast]

Hi matt, I run 16 fronts, 23 rears.

[MattYorke]

Ta. Pretty sure I asked and you replied once before, but did a search and couldn't find it.

[V8Dom]

hi
16 front, 21 rear on mine.. Told by Richard do when cold but if you are track daying , do these pressures when hot as the tyre increases by about 4 psi which on the front is 25%

dom

[GTWayne]

^^^ Unless your tyres are inflated with Nitrogen of course

[martinlaw]

Use helium in mine, car now only weighs 500kg!!!

Need to be careful not to have a puncture near any naked flames though otherwise will literally be 'burning rubber'!

[UltimaCH]

Helium is an inert gas and doesn't burn contrary to hydrogen

[MattYorke]

And I guess hydrogen would leak out too because of the small molecule size?

[ROWDYRENAULT]

When the whole Mclaren vs Ferrari spy gate thing started I thought it might be a lot of do over nothing. Then if you happen to see the article written as a result of what came out in the hearings there was a whole lot more than I thought. The one thing that really peaked my curiosity was the huge effort thet Ferrari went to in selecting a gas to go in thier tires. After all the tests were done with something like 200 different gas combinations they use a combination of CO2 and Freon. The result was a 50% reduction in temp rise over a given time and load vs straight Nitrogen. If you all remember the 06-07 seasons Ferrari was always able to make thier tires work over a longer period of time then the rest. Now we know