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08-07-2006, 02:01 PM
Vytenis wrote:
For my FWD Nissan, I run 36f/32r for the street and bump the fronts up to 38 for driving events with street tires, leaving the rears at 32. With r-comps I run 32f/26r, track only, of course. If it's really cold or wet, I'll take the pressures down 5-6 psi, all the way around.
The symptoms of too high a pressure will be loss of grip/traction, which is the opposite of what you want. Unfortunately, under inflation causes the same symtom with the addition of possible tire roll under. The tricky part is to find the sweet spot some where in between. What makes that even more complicated is the variables that get thrown into the mix. I.e. air/track temps, weather, type of tire, tire model/manufacturer, your suspension setup/tuning or lack there of, driving style. It's a moving target, in other words. About the only real way to dial in the optimum for you, is by trial and error.
Quote:Porsche provides tire pressure recommendations. What do you run on the street and autocross. What are the symptoms at autocross if pressure is too high?I've found this to be a good read on the topic. http://www.autocross.us/forums/lofiversion/index.php/t46.html
For my FWD Nissan, I run 36f/32r for the street and bump the fronts up to 38 for driving events with street tires, leaving the rears at 32. With r-comps I run 32f/26r, track only, of course. If it's really cold or wet, I'll take the pressures down 5-6 psi, all the way around.
The symptoms of too high a pressure will be loss of grip/traction, which is the opposite of what you want. Unfortunately, under inflation causes the same symtom with the addition of possible tire roll under. The tricky part is to find the sweet spot some where in between. What makes that even more complicated is the variables that get thrown into the mix. I.e. air/track temps, weather, type of tire, tire model/manufacturer, your suspension setup/tuning or lack there of, driving style. It's a moving target, in other words. About the only real way to dial in the optimum for you, is by trial and error.