Re: [ATM] OT: increasing mpg

[George Anderson <tillerman1@videotron.ca>]

Bruce MacDonald wrote:
> 
> There are ranges of acceptable substitutes (at least in Canada).  Any
> competent tire dealer can go over the various acceptable tire size
> combinations and discuss the pros and cons of each.  Outside that
> range there could be consequence ranging from warranty issues to
> increased liability assessed in the event that the modification
> contributes to an accident.
> 
> Of more concern to me is the mention in the original post of running
> with tires over-inflated.  If nothing else, the excess tire wear would
> go a long way toward negating any fuel savings.  I have found over the
> years that tire pressure has a huge impact on handling, and I can tell
> by how my car corners which tire is under- or over-inflated.  I'm
> often surprised by how little it is out of spec.
> 
> I first noticed this when I got my previous vehicle but it is the same
> with my current one.  I wonder why I never noticed it before that.
> 
> --BM
> 

Bruce

I noticed that any of the front wheel drive cars that I have owned have
been much more sensitive to tire pressure than any of the rear wheel
drive cars that I owned. That being said I also found that on all cars
the tighter your suspension is tuned for performance driveing the more
sensitive they are to pressure variations.
And a 50% overpresure definately baloons the tire. Back in the mid 70's
if someone did a very impressive smoking burnout we would run over to
see if the "patch" matched the tire width. At least half of the time it
didn't.
And a loss of traction on acceleration also meant the same thing on
braking.

George Anderson
Montreal Quebec

Clear skies and good health
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