I hope y'all don't mind my resurrecting this thread; I think there is some worth in a couple of remarks:
[quote=07 naja;6290157]
Quote:
Originally Posted by 2cokeman
35psi[/QUOTEtt
Thats 35psi on the coupe but the vert is 32psi.
Vic
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I wonder why that is. The convertible needs a softer ride? It's a bit heavier, should have equal or higher pressures, no?
Lower pressure - to a point - makes better traction in the back wheels, for acceleration. Lower pressure in any tire results in the sidewall doing more work in cornering, makes for less responsive steering, and is dangerous at sustained high speeds.
Tire Rack dot com has some excellent tech pages, including one with a chart of recommended pressure increases
above normal inflation, for a range of higher speeds. I just saw a sticker sold by an eBaY vendor, purported to be a GT500 item, that recommends inflating the tires to 40 PSI in order to avoid tire failure at speeds over 150 MPH.
There is almost never a simple answer to "what's my pressure supposed to be?" I got a set of those GT500 takeoff wheels and tires, ran them at 35 front and rear until a trip to Texas for some fast driving. Before leaving home I set them at 38, which was in line with the speeds I expected to attain. Should have added another pound or two, as I actually did get up there pretty good, according to GPS.