Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Correct Tyre Pressure

In fact I think I have cracked the sign off change, I was tying to edit the username, it was the sign off I wanted to change....Whoopee......

With UK weather fluctuations you could well be adjusting your pressures from one part of the day to the other if you had serious OCD

Now I know why you are called Milligoon

First impression with 22 front and 26 rear is a slightly harder ride and a more responsive front end, better turn in.

I can't believe you got that many miles, you can't be trying hard enough. Maybe you need a tune up.

On point 5, when I picked up my Roadster it was somewhat bouncy, and I had NeilM with me, we stopped and lowered the tyre pressures all round by about 1.5psi, and it made an immediate difference. This was not a particularly hot day and lots of water on the roads so tyres were not getting warm. Suspect they were slightly over-inflated from Williams. Also I have softened the front Koni's to 5 clicks and rears to 3. Which has improved the ride, but I think they need to be a little firmer so moving up to 6 and 4 respectively.

As for tyre pressures front to rear, you after right they should be biased according to front rear weight bias, and quite a few performance cars do this accordingly. I suspect a a 22psi up front and 24psi rear is about right for a Roadster. Do bear in mind that with a harder tyre on the rear if it does not get warm and you hit a more slippery surface in a bend it is more likely to break away, as the tyre wall will be less forgiving. I have experienced this in Rosie with a sudden rear end out and a resultant Fish Tailing up the road, If this ever happens do not brake but power on out through it, if you brake the rear end will come right round.

19,000 miles were done by the original owner, Morgan Motor Company!!!!

I wondered if they were the second set, but no, date codes are all mid 2009, so they have to be original!!

But it was a lady driver!

Blimey 19k, I've done 4k since 02.07 and was thinking of changing the rears as back end coming out really easily in the dry now, keep on smokin

This is a true fact.....

I have tried various pressures on the Plus 4. Initially I found 1.5 bar (22 psi) too squirmy at the rear and increased to 1.7 bar (25 psi) all round. After I had the panhard rod fitted I found that I could reduce the pressure back to 1.5 bar but I have just checked tyre wear and I have found that the rears are slightly more worn on the shoulders. (When is not in the car I tend to push much harder in the corners ) Certainly the back end really sticks to the road but this wear pattern seems to indicate that the rears are somewhat underinflated. I plan to try 1.5 bar front and 1.6 or 1.7 bar rear. I realise that the lower pressure grips better and hope to arrive at a compromise between ride, feeling and grip.