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#547903 - 13/12/18 06:32 PM +8 tyre pressures
Almond Offline
Just Getting Started

Registered: 28/07/16
Posts: 49
Loc: Cambs., UK
Apologies if this has been done to death but what tyre pressure do people run on recent +8s? I'm new to the +8 and I've been using it at 2.2 bar (32 psi) since I collected it from Krazy Horse in the summer. The car is on 245/40 R18 Yokohama Advans and ride comfort was not too bad so I've only now got round to checking it (I know I know .. probably should have done it before..)
The manual says 25 psi (1.7 bar) but presumably it was set at 32 psi for a reason. 32 psi strikes me as high (low mass car and relatively wide footprint etc) but as the ride comfort was not too bad maybe thats right. Who knows? Certainly not me! and I would appreciate any feedback based on personal experience.

Thanks guys.
_________________________
Ian
now +8 and ex-ARP4 (weeps quietly)

A convert to the joy of Morgans after years of motorcycles

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#547904 - 13/12/18 06:33 PM Re: +8 tyre pressures [Re: Almond]
Almond Offline
Just Getting Started

Registered: 28/07/16
Posts: 49
Loc: Cambs., UK
PS: ARP4 now changed for the +8 Speedster so sorry for confusing sign off. I'll change it.
_________________________
Ian
now +8 and ex-ARP4 (weeps quietly)

A convert to the joy of Morgans after years of motorcycles

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#547909 - 13/12/18 07:09 PM Re: +8 tyre pressures [Re: Almond]
John Winn Offline
L - Learner Plates On

Registered: 27/05/12
Posts: 108
I have always run my Speedster at 25 psi.


Edited by John Winn (13/12/18 07:58 PM)

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#547915 - 13/12/18 07:43 PM Re: +8 tyre pressures [Re: Almond]
Alistair Offline
Smile, it confuses them
Charter Member

Registered: 18/03/09
Posts: 5751
Loc: Hampshire
I run my Series 2 Aero at 25 front and 26 back on Mich PSS.
_________________________
Just time to burn a little more petrol before dinner.

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#547921 - 13/12/18 08:22 PM Re: +8 tyre pressures [Re: Almond]
Almond Offline
Just Getting Started

Registered: 28/07/16
Posts: 49
Loc: Cambs., UK
Many thanks for the quick feedback John, Alistair. 25 psi it is then, with maybe a bit more at the back when with luggage etc.
_________________________
Ian
now +8 and ex-ARP4 (weeps quietly)

A convert to the joy of Morgans after years of motorcycles

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#547931 - 13/12/18 09:17 PM Re: +8 tyre pressures [Re: Almond]
britmog Offline
L - Learner Plates On

Registered: 13/12/17
Posts: 173
Loc: Colorado, USA
I have always run my 1994 +8 at 22 psi both front and back. Found this pressure to give the correct handling and ride comfort for me especially on the twisty mountain roads here in Colorado.

I would try different pressures between 22 - 26 psi and see which you prefer.
_________________________
Bruce Marshall
1964 4/4 Series V Comp (Megan)
1994 +8 (Maurice)
2013 M3W (Olga)

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#547934 - 13/12/18 09:37 PM Re: +8 tyre pressures [Re: Almond]
Heinz Offline

Talk Morgan Addict

Registered: 07/09/09
Posts: 3725
Loc: Cologne, Germany
And with only a small difference between front and rear you can adjust the wanted degree of oversteer or understeer very well.

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#547983 - 14/12/18 10:03 AM Re: +8 tyre pressures [Re: britmog]
robmog88 Offline

Talk Morgan Regular

Registered: 21/05/07
Posts: 900
Loc: Walsall, uk
Agree 22 all round on Toyo proxes

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#547984 - 14/12/18 10:22 AM Re: +8 tyre pressures [Re: robmog88]
Graham, G4FUJ Offline
Salty Sea Dog
Member of the Inner Circle

Registered: 03/07/07
Posts: 22059
Loc: Cheltenham, Glos. UK
Originally Posted By britmog
I have always run my 1994 +8 at 22 psi...

Originally Posted By robmog88
Agree 22 all round...


One slight problem with those answers - the OP is requesting pressures for the Aero (ally chassis) based Plus 8, not a trad/classic. The tyres on the Aero Plus 8 are more like rubber bands. smile
_________________________
Graham (G4FUJ)

D8921 L44FOR '93 4/4 Giallo Fly 2 seat smile
'90 LR 90 SW
'07 MINI Cooper

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#548112 - 14/12/18 10:13 PM Re: +8 tyre pressures [Re: Almond]
Taffmog Offline
Talk Morgan Enthusiast

Registered: 22/09/10
Posts: 1539
Loc: Wales
25psi for me on the Aero +8.......

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