Tire Pressure 34 or 35

marc hildebrant

marc hildebrant

Well-known member
Group,

The ford users manual (one that comes with the car) recommends 35 lbs pressure in the tires.

Les Andrews book recommends 34 lbs. Now, the difference is only one lb, but, why would he recommend such a smaller value ?

Marc
 
marc hildebrant said:
Group,

The ford users manual (one that comes with the car) recommends 35 lbs pressure in the tires.

Les Andrews book recommends 34 lbs. Now, the difference is only one lb, but, why would he recommend such a smaller value ?

Marc
Click to expand...
Its soooo minor i wouldn't worry about it.:)
 
i just knocked mine down from 35 to 30 in a 1931 widebed pickup. Seems to ride so much better. Think maybe harder on the tires but easeyer on the car. Any comments?
 
Even digital air gauges can be off +/-.5psi every time you take a reading. So checking a tire twice can give you different readings.

The only reasoning behind the difference between the Ford owner's manual and Les's book probably has to do with old rubber formulae and more modern rubber. But I sure wouldn't worry over 1 psi that most mechanical gauges can't read anyway.
 
Nitrogen

Have them drained and refilled with Nitrogen. Larger molecule does not pass through layers of silicone and rubber as easily as 78% Nitrogen + 21% Oxygen (air).

I had mine done, along will all my other vehicles and trailers. Have only had to add Nitrogen once to one tire in over a year.

There was an article in "Model A Times" some time ago by a tire engineer. The premise that was more pressure was good (on skinny tires if I remember correctly) because that keeps down the dangerous heat levels that build up along the circumference of the tire near the bead and wheel. Overfilling is bad, but slight overfilling is MUCH better than any level of under filling unless you are tracking through snow, or ride is an issue.
 
marc hildebrant said:
Group,

The ford users manual (one that comes with the car) recommends 35 lbs pressure in the tires.

Les Andrews book recommends 34 lbs. Now, the difference is only one lb, but, why would he recommend such a smaller value ?

Marc
Click to expand...

Global warming will change that 34 lbs. to 35 by the end of the day.:)
 
so is it 34 or 35 , hot or cold , is that another item for points to be deducted ?
'oh , and consider that altitude up there in longmont .
 
marc hildebrant said:
Group,

The ford users manual (one that comes with the car) recommends 35 lbs pressure in the tires.

Les Andrews book recommends 34 lbs. Now, the difference is only one lb, but, why would he recommend such a smaller value ?

Marc
Click to expand...

If you are familiar with the Les Andrews books you will notice he doesn't seem to have read or at least been influenced by the Ford Manuals.
Rainmaker Ron
 
I experimented with tire pressures in my 60-A Leatherback Fordor, a heavy car. It tended to oversteer with 35 all around so I dropped the fronts to 34 and raised the rears to 38. No more oversteering. In my CCPU I also reduced the pressures all around to 32 to ease the harsh ride when the truck has no load in back which is most of the time. When I use the truck for hauling I just add 5# to the rears. Others will find other combinations that work for them.
 
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