In my +8 which I race (the youngest car in the race series here in the =
UK - 1989 - makes up for the driver a bit) I use 32 front and 30 rear in =
the dry. In the wet, I use 28 front, 26 rear.
These are much higher than the recommended road pressures.
The reason is that the road pressures are a compromise between ride =
comfort (bouncy tyres) and cornering. When you corner fast, the tyre =
rolls a bit onto its sidewall. This loses grip. By blowing the tyre up =
more, you get a more rigid sidewall and it therefore stays vertical and =
that improves the grip.
In the wet, you need more straight rubber on the road, hence dropping =
the pressures a bit.
My car is very sensitive to the tyre pressures. It makes seconds a lap =
difference to have the tyres as described. If they are unbalanced, it =
corners less well, with either front or rear breaking free first. You =
really want them both to go at the same time (a "balanced" car). Then =
the car feels really great to drive!
Most of the racers use a Panhard rod. Our best Morgan dealers (eg Rick =
Bourne at Brands Hatch or Rob Wells at Libra Motiv) fit them. my car is =
one of the few without: my fuel tank has the fuel outlet in just the =
place the rod would connect to the axle (outlet holes all made by hand =
wherever they feel like punching a hole!), and I couldn't face buying a =
new tank.
-----Original Message-----
From: ebrown@ms.com [SMTP:ebrown@ms.com]
Sent: Friday, June 20, 1997 8:32 PM
To: Morgans@autox.team.net
Subject: Tire/tyre Pressure and Axle Crabs
I have various notes from different folks about how much air people=20
put in their tires/tyres. Range seems to be from 16 pounds to 30=20
pounds, which is quite a range. I'd like to hear from some of you =
who=20
also drive on the track how much air you put in your fronts and =
rears,=20
and from some of the rest about how much "road air" you generally =
use?
=20
Question #2: My long-gone Volvo PV544 had a locating arm which=20
attached to the rear axle and then to the chassis, parallel to the=20
axle. I think it is called a Panhard rod after the French engineer, =
<snip>
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