[DeTomaso] tire pressure help needed-Jim brings up a GOOD point

[Kerry Maguire]

My mid engine Boxster S required approximately 5 lbs. more pressure on
the rear tires. 

 

I cannot understand what the DeTomaso logic is for putting more pressure
in the front tires vs. the rear since the car is also mid engine.

 

I had 911 SC's in years past, but I do not remember what the recommended
tire pressures were, but I am sure they were biased to having more air
in the rear tires. However, since that is a rear engine car, higher tire
pressures would be expected in the rear tires.

 

Regards,

 

Kerry M. Maguire

 

________________________________

From: pantdino at aol.com [mailto:pantdino at aol.com]       
Sent: Monday, February 09, 2009 10:18 PM
To: Kerry Maguire; detomaso at realbig.com
Subject: Re: [DeTomaso] tire pressure help needed

 

Within reason, more pressure = more grip, better steering response and
sharper handling

I experimented with my car when it had 7's and 8's and found that about
3-4 lbs more in the rear was best-- I used to put them up to like 31
front 34 rear and they would slowly lose air over a few months but
maintain roughly the same ratio
..
More difference between front and rear increases understeer / makes the
car less likely to spin.  Low front tire pressures gives you lousy
steering response and worn tire edges.  The brand of tire should not
make any difference, assuming you have similarly designed tires on front
and rear.

I believe there are some US owners manuals that suggest having more
pressure in the FRONT.  I tried that once just to see and scared myself
-- definitely not the thing to do.  The very idea of that is idiotic--
you need more pressure on the end of the car with more weight.  

However, the above assumes your tire sizes are not wildly different.
People who run 225 fronts and 335 rears have to run lower rear pressures
to prevent the center of the tread from wearing early and also to
prevent excessive understeer.   

Jim






-----Original Message-----
From: Kerry Maguire <kmaguire at landrovermiramar.com>
To: detomaso at realbig.com
Sent: Sun, 8 Feb 2009 8:20 am
Subject: [DeTomaso] tire pressure help needed

I need to know what the recommended tire pressure is for Toyo Proxes 4's
and 




ST's mounted on 15" factory 8's and 10's.




 




thanks in advance.




 




Regards,




 




Kerry M. Maguire




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