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Topic: Tyre Pressure (Read 528 times) |
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Chris Dean
Newbie
'98 2.3 Ultima Saloon
Posts: 35
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Tyre Pressure
« on: Apr 20th, 2006, 1:19pm » |
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The dreaded MoT is just around the corner and as part of my pre-MoT service my local garage recommended that I fit four new tyres.
Some £260 later (Avon ZZ3 225/50 R16) I thought that I'd better check the tyre pressure. The manual states 29 psi for the front and 26 psi for the rear (under normal loading).
I set the correct pressure (when the tyre was cold) using a digital pressure gauge but the tyres look a little under inflated.
Am I being paranoid?
Cheers
Chris.
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Dazed and Confused.
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PeteB
Full Member
2.0 16v Ultima Saloon RIP \ 2.5 TD Ultima Saloon
Posts: 229
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Re: Tyre Pressure
« Reply #1 on: Apr 20th, 2006, 1:30pm » |
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Mine too are the correct pressure and look a bit flat, I put it down to the sheer weight of the car. Shes a bit of a big girl after all 
Pete
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scorpio_man
Administrator
Ford Kuga awd
Posts: 5654
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Re: Tyre Pressure
« Reply #2 on: Apr 20th, 2006, 1:48pm » |
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hi there
i run 31 front, 29 rear. means you can run deeper into corners and the backend won't be quite as twitchy coming out! 
hth
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mr._floppy
Junior Member
Posts: 100
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Re: Tyre Pressure
« Reply #3 on: Apr 20th, 2006, 1:52pm » |
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Ditto, at even 32 psi my fronts still look like they could do with a bit more puff, which maybe explains why the power steering is pathetic and hardly " Light " .
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Octavian_P
Senior Member
 
Posts: 1126
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Re: Tyre Pressure
« Reply #4 on: Apr 20th, 2006, 2:16pm » |
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Underinflation also reduces the mpg. I keep mine at ~33 front and ~34 back
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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mazzy_j
Full Member
Posts: 664
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Re: Tyre Pressure
« Reply #5 on: Apr 20th, 2006, 2:48pm » |
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34 at the back? Surely you would want a higher psi at the front because of the extra weight of the engine  I keep mine at 34psi at the front and 30psi at the back which seems to be a nice combo between bump absorbing and handling.
Matt
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Octavian_P
Senior Member
Posts: 1126
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Re: Tyre Pressure
« Reply #6 on: Apr 20th, 2006, 3:28pm » |
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The front is less inflated for better direction. The back has bigger pressure because sometimes i go on longer outside town trips and load the boot up with lots of stuff.
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: Tyre Pressure
« Reply #7 on: Apr 20th, 2006, 10:35pm » |
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34 front & 34 back always feels good to me.
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sector-9
Senior Member
No scorpio anymore
Posts: 1069
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Re: Tyre Pressure
« Reply #8 on: Apr 20th, 2006, 10:42pm » |
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 IME manufacturer's tend to err on the soft side - presumably to give a more comfortable ride. My old Rover 414 specified about 28psi all round - only problem was that it wore the shoulders at that pressure. Eventually found 35psi to be about right for even wear.
Darren
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Scorpioen84
Full Member
Saloon 2.0 16v TC 140bhp -95
Posts: 404
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Re: Tyre Pressure
« Reply #9 on: Apr 20th, 2006, 11:43pm » |
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Does`nt the load index of the tyres deside this.?
Normal cheap tyres have about 89...
My summer tyres have a higher loadindex and they look right, but winter tyres have 89, and they look "flatt"(er)... 
Just weeks before summertyres comes one again.!
(yeye, you GB guys dont have this problem... )
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: Tyre Pressure
« Reply #10 on: Apr 21st, 2006, 12:59am » |
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Isn't it great having the same weather all year round.
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Paulus
Full Member
Big and Ugly....DON'T MESS!!!
Posts: 150
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Re: Tyre Pressure
« Reply #11 on: Apr 21st, 2006, 7:18am » |
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Yeah...wet and miserable. 
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If I said you had a beautiful body.....
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