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Topic: Tyre pressures (Read 3135 times) |
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km449
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I run a 97 2.3 Ultima Estate with 225's, usually with a load of 2 adults and 1 child
Handbook recommends 29f/26r but |'ve noticed some members saying they run at 31psi all round.
What's the view/advice here re pressures - I don't do high speed motorway runs very often (and def not on the M4!!)
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craig
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225's on my 2.3 as well,handbook in mine says 31 in the fronts,and 29 in the rears  if i remember...
but do run mine at 31 all round...
HTH
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scorpio_man
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Ford Kuga awd
Posts: 5654
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Re: Tyre pressures
« Reply #2 on: Apr 12th, 2005, 9:55pm » |
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hi there
my handbook says 29 front, 26 rear
i've seen other saying they run 31 all round so i might give it a try. 
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derekne
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Posts: 282
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Re: Tyre pressures
« Reply #3 on: Apr 12th, 2005, 10:15pm » |
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Hello,
I wasnt sure what psi for my tyres eithyer.
So I did the obvious as my tyers are new. I checked the side walls for max PSI.
I always drive on max PSI as ive always got loads of weight on them. I casually have 5 adults in daily me at 12 stone the lightest. Then bags of pete and bark in the boot. Topped with stuff on the roofrack with a bursting trailor. So I have mine at 40PSI all round. As the walls state for max.
Horses for couses really.
Different size and make will proberly be different.
Regards....
Derek
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derekne
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Paul B
Senior Member
'98 24V Ultima saloon
Posts: 2442
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Re: Tyre pressures
« Reply #4 on: Apr 12th, 2005, 10:53pm » |
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Same size 225 tyres here, but rarely have the car fully loaded.
I find the handbook figures of 31f & 29r pretty sound.
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Two hundred & seven horses and only one jockey!
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David_South_West
Full Member
24V............ .Goodness
Posts: 188
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Re: Tyre pressures
« Reply #5 on: Apr 13th, 2005, 7:36am » |
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Just because tyre manufacturer says 40 psi is the max does not mean that's what you shold run at fully loaded....40psi is very hard must be like driving on solid rubber wheels
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Sutton09
Newbie
1998, 2.9 24v Cosworth Ultima
Posts: 32
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Re: Tyre pressures
« Reply #6 on: Apr 13th, 2005, 6:40pm » |
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I run mine @ 31 all round and find that handling on 'B' roads feels a lot "safer" than running them at 35 and above
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scorpio_man
Administrator
Ford Kuga awd
Posts: 5654
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Re: Tyre pressures
« Reply #7 on: Apr 15th, 2005, 9:55am » |
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hi there
well i've put the pressures up to 31 all round. front ok, a wee bit hard ride. back, too hard. much too hard for my liking, so i'll put it to 29.
i'm a bit confused at all the tyres pressures quoted . i posted pressures of 29 front and 26 rear as per my h/book (31 front and 28 rear for the 24v). see http://www.fordscorpio.co.uk/handbook146.gif that's from h/book version enRHD297. what version h/book are the other pressures from? just trying to find out if there was a change in spec at some time.
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Eddie
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Must try a different shampoo!
Posts: 495
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Re: Tyre pressures
« Reply #8 on: Apr 15th, 2005, 3:38pm » |
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Keep an eye on the wear pattern of your tyres,too much wear on the outsides (both edges) means running generally too soft.
Premature wear in the centre means too hard.
eddie
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EinA
Junior Member
1996 Scorpio 2.9 24V LPG
Posts: 53
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Re: Tyre pressures
« Reply #9 on: Apr 15th, 2005, 6:34pm » |
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It used to be that manufactures would recommened slightly softer pressure for better grip/handling. If you run them slightly higher you can get better fuel consumption. Not a lot though.
This also leads to a harder ride. So long as you can get even wear, a few psi difference just means a hard or a softer ride.
David
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derekne
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Re: Tyre pressures
« Reply #10 on: Apr 16th, 2005, 12:12am » |
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I got my pressure reading from the tyre wall. Also backed up yesterday by my tyre specialist who fitted them.
People may think im bonkers but. I honestly cant tell the difference hard or soft tyres as for the smoothness of the ride.
However braking I see alot of difference. Needing little longer to stop. I just leave a bigger gap with the car infront. Also fuel and the performance are much better.
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derekne
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craig
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andrew
i do indeed owe you an apollogy  ,i have just checked the suplement that came with my handbook,and for a 2.3 you are indeed right,the pressures should be
29 in the fronts
and
26 in the rears
hope i'm forgiven  .. 
regards
craig..
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scorpio_man
Administrator
Ford Kuga awd
Posts: 5654
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Re: Tyre pressures
« Reply #12 on: Apr 16th, 2005, 5:17pm » |
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hi craig
no probs.
having the front at 31 is a more 'sporty'. i can put it into corners better, but the back can get a little 'floaty', if i push on a bit!
regards
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Biggles
Junior Member
98 2.3L 16V auto Facelift Ultima, Silver, 120k
Posts: 53
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Re: Tyre pressures
« Reply #13 on: Apr 16th, 2005, 8:35pm » |
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I run my 2.3 saloon at around 30 psi all round. I monitor the tread wear across the tyre approx. every couple of months for even wear. If the outer or inner is wearing more than the other, I just increase or decrease accordingly. Makes sure you get the full use out of the tyres especially at the price they are.
Peter
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David_South_West
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24V............ .Goodness
Posts: 188
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Re: Tyre pressures
« Reply #14 on: Apr 16th, 2005, 10:22pm » |
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RE (Needing little longer to stop. I just leave a bigger gap with the car infront)
You may get no choice if someone pulls out in front of you...... I think noticing an increase in breaking distance would be enough to prove 40lbs pressure is too much
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mr._floppy
Junior Member
Posts: 100
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Re: Tyre pressures
« Reply #15 on: Apr 17th, 2005, 10:23am » |
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Even with 31 PSI in the tyres they still look a bit soft. I bet with 40 in the front the steering must as light as a feather!!
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derekne
Full Member
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Posts: 282
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Re: Tyre pressures
« Reply #16 on: Apr 18th, 2005, 9:37pm » |
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on Apr 16th, 2005, 10:22pm, David_South_West wrote:RE (Needing little longer to stop. I just leave a bigger gap with the car infront)
You may get no choice if someone pulls out in front of you...... I think noticing an increase in breaking distance would be enough to prove 40lbs pressure is too much
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Thats where planning way ahead, and way two the sides makes a healthy safe ride.
I dont flog the car I hardly move infact 60 tops on a clear motorway.
However if im due bad weather rain ect. I take air out to about 33PSI.
Infact when the snow comes and its bad. Im down to 20 PSI.
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derekne
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music_master
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I love YaBB 1G - SP1!
Posts: 293
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Re: Tyre pressures
« Reply #17 on: Apr 18th, 2005, 10:14pm » |
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my tyres are on 30 all round and the car seems to run fine but saying this i do check that the front ones are wearing evenly ie i check the walls and the middle and they seem to be ok 
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Octavian_P
Senior Member
 
Posts: 1126
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Re: Tyre pressures
« Reply #18 on: Apr 19th, 2005, 8:58am » |
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i've got 205 tyres, i didn't kow how much to put on, and i'm keeping them at 2.2 BAR.
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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David_South_West
Full Member
24V............ .Goodness
Posts: 188
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Re: Tyre pressures
« Reply #19 on: Apr 19th, 2005, 9:08am » |
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So to summarise ....you have to reduce tyre pressure by 30% if it rains and your stopping distance has increased , you trust a tyre expert that says this is ok , risk your insurance being invalid and being prosecuted for incorrectly inflated tyres...and you think this is ok to pass this advice on to others ? How strange
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