Correct tyre preasures for road
Correct tyre preasures for road
Author
Discussion

BJ8MGCTVR

Original Poster:

10 posts

137 months

Saturday 9th May 2015
quotequote all
Easy one I suspect,

What pressures are people running?

The previous owner advised me that the correct pressures were front 22 Rear 24psi

This on (original spec?) 205/55r15 and 225/50R16 wheels all Toyos.

I had been wondering about a vibration at higher speeds, despite having had replacement bushes as follows

NS top wishbone and thrust washers
OS lowest wishbone and anti roll bar link

Imagine my surprise to find near side front wheel 22psi offside front 32psi when. I checked!




seeby

1,807 posts

199 months

Saturday 9th May 2015
quotequote all
I bet it was hard work to keep in a straight line at speed too.Mine are front 22 rear 24.smile

QBee

22,468 posts

173 months

Sunday 10th May 2015
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These cars are sensitive to wheel misalignment or imbalance.
Two things I would do if handling and driving feel less than a delight:

1. Have the wheels rebalanced by a good tyre place. That should cure your high speed vibration.
2. Get a full four wheel alignment done by a man who knows TVRs on a Hunter machine. More to improve the handling, but it also helps tyre wear.

Colin is right on the tyre pressures, that's what I run on too. Some use 24/26.

BTW, if you are more precise with your location on your profile you will get more input from people who live near you and know of local meetings, events and experts.

Edited by QBee on Sunday 10th May 07:19

woodlandsale

22 posts

149 months

Sunday 10th May 2015
quotequote all
Finding your tyres pressures set to 30-odd seems typical of dealings with modern tyres shops: I found 30 all round on my S2 when I collected it (it had just had a tyre fitted and the shop had "helpfully" adjusted them all. Similar experience with an MGB, and then with my Chimaera (acquired yesterday.....YESSSSS!!!) on which both fronts were at 30. In each case the car was jittery and the suspension felt too hard. Moral: don't trust the tyre industry "experts", even when they tell you that nowadays higher pressures are advisable for better fuel economy etc.!

QBee

22,468 posts

173 months

Sunday 10th May 2015
quotequote all
woodlandsale said:
Finding your tyres pressures set to 30-odd seems typical of dealings with modern tyres shops: I found 30 all round on my S2 when I collected it (it had just had a tyre fitted and the shop had "helpfully" adjusted them all. Similar experience with an MGB, and then with my Chimaera (acquired yesterday.....YESSSSS!!!) on which both fronts were at 30. In each case the car was jittery and the suspension felt too hard. Moral: don't trust the tyre industry "experts", even when they tell you that nowadays higher pressures are advisable for better fuel economy etc.!
Welcome to our section of the mad-house!!
I cannot speak for you, but I didn't buy a TVR for economy.




Hope you enjoy a good summer's motoring.

I mean it about the four wheel alignment, it makes such a difference to handling, and means your dampers, bushes, springs and so on will be checked as well before the TVR guy even starts with the aligner. But you probably know that already.

V8 Junkie

101 posts

266 months

Sunday 10th May 2015
quotequote all
Also found tyre pressures at 32 psi all round on my Chim when I bought it a month agoeek now set to 22&24 psismile

SILICONEKID345HP

14,997 posts

260 months

Sunday 10th May 2015
quotequote all
woodlandsale said:
Finding your tyres pressures set to 30-odd seems typical of dealings with modern tyres shops: I found 30 all round on my S2 when I collected it (it had just had a tyre fitted and the shop had "helpfully" adjusted them all. Similar experience with an MGB, and then with my Chimaera (acquired yesterday.....YESSSSS!!!) on which both fronts were at 30. In each case the car was jittery and the suspension felt too hard. Moral: don't trust the tyre industry "experts", even when they tell you that nowadays higher pressures are advisable for better fuel economy etc.!
They need to set the pressure high to make a good seal

Is that 22 front 24 rear ? i think i have mine the wrong way round ..eek


Edited by SILICONEKID345HP on Sunday 10th May 19:59

QBee

22,468 posts

173 months

Sunday 10th May 2015
quotequote all
SILICONEKID345HP said:
woodlandsale said:
Finding your tyres pressures set to 30-odd seems typical of dealings with modern tyres shops: I found 30 all round on my S2 when I collected it (it had just had a tyre fitted and the shop had "helpfully" adjusted them all. Similar experience with an MGB, and then with my Chimaera (acquired yesterday.....YESSSSS!!!) on which both fronts were at 30. In each case the car was jittery and the suspension felt too hard. Moral: don't trust the tyre industry "experts", even when they tell you that nowadays higher pressures are advisable for better fuel economy etc.!
They need to set the pressure high to make a good seal

Is that 22 front 24 rear ? i think i have mine the wrong way round ..eek


Edited by SILICONEKID345HP on Sunday 10th May 19:59
That's right Daz

Dr Mike Oxgreen

4,466 posts

194 months

Monday 11th May 2015
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If you're running excessively high pressures and you slide backwards into a tree and burst into flames, that's going to hurt your fuel economy.