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Post by Zed. on Jul 16, 2018 10:45:44 GMT
Hello all, as titled, I've been wondering on tyre pressures for my NA, I'm . running Schyte & cheapo tyres at the moment so this obviously doesnt help BUT was wondering as to what sort of pressures people run with 195/50/15 tyres (on a 6" rim if that helps?) think I'm using 26psi as a baseline but is this realy what works? (okey, maybe diferent tyres, springs & dampers, weather & driving sytles will come into this  ) Rich. |
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Post by wannabe on Jul 16, 2018 12:11:43 GMT
You could always experiment - run on 26, see how it feels, then up to 32 and try again. Then narrow it down to one that is in the middle of the two?
I run 31 myself, although I believe this is a few PSI higher than most people run.
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Post by Zed. on Jul 16, 2018 12:28:07 GMT
You could always experiment - run on 26, see how it feels, then up to 32 and try again. Then narrow it down to one that is in the middle of the two? I run 31 myself, although I believe this is a few PSI higher than most people run. 32  I would have thought that high would bang a bit? I agree with trial & error 9mostly error!) a few years ago (well, 10+...) I run 15psi in my 1965 MG Midget's tyres, okey, the car is slightly lighter than a '5 and the tyres were smaller (155/13) as anything higher was somewhat bouncy & banged on the lovely damaged roads of South West Wales  I used to 'service' (think manage  ) a few rallycars on events, one was a successfull Mitsubishi Evo6. it ran on 17" race tyres then upgraded to 18"... on 17" I would set the tyres to around 22psi on a warm day (rare in Wales), on the 18" I would set the pressures down to 16psi (a hot day in Pembrey, the car won that event so obviously worked & the crew were more than happy with the car's setup  ) Rich. |
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Post by wannabe on Jul 16, 2018 14:35:35 GMT
You could always experiment - run on 26, see how it feels, then up to 32 and try again. Then narrow it down to one that is in the middle of the two? I run 31 myself, although I believe this is a few PSI higher than most people run. 32 I would have thought that high would bang a bit? I agree with trial & error 9mostly error!) a few years ago (well, 10+...) I run 15psi in my 1965 MG Midget's tyres, okey, the car is slightly lighter than a '5 and the tyres were smaller (155/13) as anything higher was somewhat bouncy & banged on the lovely damaged roads of South West Wales I used to 'service' (think manage ) a few rallycars on events, one was a successfull Mitsubishi Evo6. it ran on 17" race tyres then upgraded to 18"... on 17" I would set the tyres to around 22psi on a warm day (rare in Wales), on the 18" I would set the pressures down to 16psi (a hot day in Pembrey, the car won that event so obviously worked & the crew were more than happy with the car's setup ) Rich.
The missus' car recommends up to 41 lol
I should probably experiment a bit to see how it feels - I worry that sidewall 'squidge' with lower pressures might make the steering feel a bit vague, although as it needs the track rods replaced and the column welded due to wear/play anyway, and then the tracking sorted out, lolI need to get all that sorted first so I know that any weirdness is down to tyres! |
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Post by nickd on Jul 20, 2018 8:12:54 GMT
It is a question only you can answer as you know what you want from the car. Most people ask this question wanting to know what will change their tyres from unsatisfactory to great. You have to know what "great" is for you.
Also as someone who supplies and fits bot race and rally tyres, pressures that low risk fatiguing the sidewall's of tyres well before you build any pressure. Run a curb with at that pressure and you very much risk the sidewall. The race MX5's will run an average of 25psi cold out the Pits unless it is wet when it could be as high as 45. Race C1's will be around 50psi front and 70 rear. A light FF car on cross Ply tyres might run something like 15psi cold but the things weigh nothing and they expect pressures to rise
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)
) a few rallycars on events, one was a successfull Mitsubishi Evo6. it ran on 17" race tyres then upgraded to 18"... on 17" I would set the tyres to around 22psi on a warm day (rare in Wales), on the 18" I would set the pressures down to 16psi (a hot day in Pembrey, the car won that event so obviously worked & the crew were more than happy with the car's setup 
)
le sigh