Click here to return to the home page.
Morgan Aero 8
Who's Online
16 registered (Wirewheel, Alistair, DavidR, PaulJ, DCH, Mac39, JMD, Rog G, TheCustomer, Bonesie, Pmh44, rv6, Bunny, pandy, teifistar, alb), 120 Guests and 11 Spiders online.
Key: Admin, Global Mod, Mod
Latest Photos
Vehicle Lifts
When Your Wife Understands You...
Factory visit
Welcome home...
She’s revived
Newest Topics
Selling one of my Aero’s
by Shooter
19/04/19 06:54 PM
S5 Aero for sale
by Shooter
19/04/19 06:50 PM
ONE FOR NORTHERNMORGAN !!!!
by KEVFITZ
19/04/19 05:58 PM
JENKS "SPECIAL"
by KEVFITZ
19/04/19 05:54 PM
Pithy saying
by BobtheTrain
19/04/19 02:54 PM
Door striker plate removal
by CJB
19/04/19 02:00 PM
And you thought you had problems ?
by chocadoodledoo
19/04/19 01:15 PM
Newest Members
Roxy Plus4, RobCol, Rsglush, Michael Oritt, Rade Loos
6469 Registered Users
Shout Box

Forum Stats
6,469 Registered Members
33 Forums
34,823 Topics
562,047 Posts

Most users ever online: 341 @ 11/02/18 10:30 PM
Today's Birthdays
No Birthdays
Page 1 of 4 1 2 3 4 >
Topic Options
#572057 - 15/04/19 03:40 PM Increase tyre pressures, improve steering?
Gareth H Offline

L - Learner Plates On

Registered: 29/07/18
Posts: 115
Loc: Salisbury Plain
I did an airfield activity day on Friday, and as recommended increased tyre pressures, as there is the (unlikely) risk of the tyre falling off the rim with the sideways loads, it happened to an mx5 last time I was there, but he hadn't checked his pressures and the other 3 were at circa 15psi, so his own fault.
I have been running at 25 psi, which I increased to 30, didn't get round to dropping the pressure back down again after the day, and have been using the car today.
Well I have always thought that the steering was a little strange, difficult to explain, but doesn't feel very linear, and a bit bottom clenching if travelling quickly and having to make adjustments mid bend.
Running the higher pressures has totally changed steering feel, it has become very positive on turn in and much less dramatic making mid corner adjustments.
Anybody else had similar experiences?
S5 on 19" rims with Conti tyres.
G
_________________________
Gareth
Aero 8
R Nine T
335d
BMW Power!

Top
#572066 - 15/04/19 04:31 PM Re: Increase tyre pressures, improve steering? [Re: Gareth H]
NickCW Offline
Has a lot to Say!

Registered: 20/02/16
Posts: 1127
Loc: Buckinghamshire
That is very interesting, as Morgan suggest running lower pressures but when speaking to a Michelin technical rep he suggested to go with about 30 all round..
_________________________
Aero 8 S1

"What we do in life.. echoes in eternity."

Top
#572079 - 15/04/19 05:38 PM Re: Increase tyre pressures, improve steering? [Re: Gareth H]
James B W Offline

Has a lot to Say!

Registered: 31/07/14
Posts: 1204
Loc: Newcastle Upon Tyne
hmmn thinking - could be tempted to try this........

James
_________________________
Aero8 , Series 1 - Boston Green
Range Rover Evoque
Smart Brabus Convertible

Top
#572144 - 15/04/19 10:18 PM Re: Increase tyre pressures, improve steering? [Re: NickCW]
Felix42 Offline
Talk Morgan Regular

Registered: 17/12/13
Posts: 874
Loc: Newton Abbot, South Devon UK
Originally Posted By NickCW
That is very interesting, as Morgan suggest running lower pressures but when speaking to a Michelin technical rep he suggested to go with about 30 all round..


There is a high risk of understeer if tyres are overpressured.
_________________________
John

Silver 2005 S1 Roadster V6 - Henrietta

Top
#572163 - 16/04/19 06:24 AM Re: Increase tyre pressures, improve steering? [Re: Felix42]
Gareth H Offline

L - Learner Plates On

Registered: 29/07/18
Posts: 115
Loc: Salisbury Plain
Originally Posted By Felix42
Originally Posted By NickCW
That is very interesting, as Morgan suggest running lower pressures but when speaking to a Michelin technical rep he suggested to go with about 30 all round..


There is a high risk of understeer if tyres are overpressured.


It's certainly not understeering
_________________________
Gareth
Aero 8
R Nine T
335d
BMW Power!

Top
#572201 - 16/04/19 09:24 AM Re: Increase tyre pressures, improve steering? [Re: Gareth H]
Felix42 Offline
Talk Morgan Regular

Registered: 17/12/13
Posts: 874
Loc: Newton Abbot, South Devon UK
If you car's front tyres loose adhesion because they are over pressured and it carries straight on when you turn the steering wheel, isn't that understeer? Or am I missing something?
_________________________
John

Silver 2005 S1 Roadster V6 - Henrietta

Top
#572203 - 16/04/19 09:25 AM Re: Increase tyre pressures, improve steering? [Re: Gareth H]
Frank 4x4 Offline
Green & Grown Up
Talk Morgan Addict

Registered: 10/05/09
Posts: 3612
Loc: Hill Head, Hampshire, Uk

I always go just 2.5lbs higher when re inflating as the Mog Spokes will lose pressure over time.

The Roadster 100 steers superbly and did Jink well when needed to avoid the middle of the roaders coming at me.

I have no Idea of the legal implications on liability - if one is unfortunate to be in an accident with well over the recommended tyre pressures and the car is taken away and Police Checked, as my shortened and undrivable Volvo was, when I was unfortunate to be stationary in the middle of a three vehicle shunt?

Frank.



Frank
_________________________
http://franks4x4-solograndetour.blogspot.co.uk/
Combat Stress-http://www.justgiving.com/Roadster100

Top
#572236 - 16/04/19 12:29 PM Re: Increase tyre pressures, improve steering? [Re: Felix42]
Gareth H Offline

L - Learner Plates On

Registered: 29/07/18
Posts: 115
Loc: Salisbury Plain
Originally Posted By Felix42
If you car's front tyres loose adhesion because they are over pressured and it carries straight on when you turn the steering wheel, isn't that understeer? Or am I missing something?

Sorry have I missed something? The steering is much more positive on turn in with the higher pressure, I understand that understeer / oversteer can be effected by increasing / reducing tyre pressures on one axle, I have increased all pressures, so the balance remains the same (as far as I understand).
_________________________
Gareth
Aero 8
R Nine T
335d
BMW Power!

Top
#572258 - 16/04/19 02:35 PM Re: Increase tyre pressures, improve steering? [Re: Gareth H]
Felix42 Offline
Talk Morgan Regular

Registered: 17/12/13
Posts: 874
Loc: Newton Abbot, South Devon UK
If tyre pressure is too high, then less of the tyre touches the ground. As a consequence, your car will bounce around on the road. And when your tyres are bouncing instead of firmly planted on the road, traction suffers and so do your stopping distances. You'll also feel a decrease in ride comfort.
It is a common misconception that overinflating your tyres will provide more responsive handling and greater fuel efficiency. In fact, over-inflation is detrimental to the tyres and can be dangerous. For the best handling and fuel efficiency, you should adhere to the manufacturer's optimum tyre pressure.
_________________________
John

Silver 2005 S1 Roadster V6 - Henrietta

Top
#572260 - 16/04/19 02:40 PM Re: Increase tyre pressures, improve steering? [Re: Gareth H]
Gambalunga Offline

Member of the Inner Circle

Registered: 03/09/11
Posts: 11117
Loc: Mandello del Lario, Lake Como,...
You could always check with the chalk method described on http://eastcoastoverlandadventures.blogspot.com/2016/07/tire-pressure-management.html

There is an interesting tool that PJB told me about at
http://paws.kettering.edu/~amazzei/tire_calculator.html

It allows you to compare tyres of different characteristics and pressures etc.
_________________________
Peter


Top
Page 1 of 4 1 2 3 4 >

Moderator:  Aeroman, Boshly, Simon