Tire Pressure
Thread Starter
Cruising
Joined: Nov 2009
Posts: 14
Likes: 0
From: Fort Myers FL
Tire Pressure
What do you keep your pressure at?
I'm running goodyear runflats at 30psi each. the tire reads 40-44 max psi though. What is the best psi for performance? How high would you go to conserve tire tread?
I'm running goodyear runflats at 30psi each. the tire reads 40-44 max psi though. What is the best psi for performance? How high would you go to conserve tire tread?
Le Mans Master
Joined: Aug 2004
Posts: 5,259
Likes: 16
From: Monroe Township New Jersey
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
St. Jude donor in memory of jpee '14
Since you are in sunny Florida you do not have to worry about adjusting the air pressure in the rears for better traction in the cooler months.
Too much air all around will give you a bit better gasoline mileage but wear the tires quicker.
A bit less air the the rears will give you better traction (drag racing) but reduce the life of the rear tires.
I would suggest that you maintain what GM recommends.
Team Owner
Joined: Sep 2000
Posts: 25,015
Likes: 2,709
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Our 2009 manual says to inflate to 38 psi cold if planning to drive for extended periods over 175 mph, which not many of us get to do. That would wear out the center of the tread in a big hurry.
Best grip on the Goodyears seems to come at mid-to-upper 30's pressure, hot. So that puts us back to 30-33 cold.
The e ngineers really did get the pressure about right on the C6.
Best grip on the Goodyears seems to come at mid-to-upper 30's pressure, hot. So that puts us back to 30-33 cold.
The e ngineers really did get the pressure about right on the C6.
Drifting
Joined: Oct 2006
Posts: 1,340
Likes: 6
From: Redmond WA
Have a 2011 base coupe with F55, upgraded to Z51 sways. Have increased the rake by decreasing the front ride height about a quarter inch lower than average in front, and about the same in the rear. The left side ride height is about 1/8 inch higher than the right in front and rear. Using the aggressive end of the Pfadt street alignment settings. I weigh 200 pounds.
I run 33.5 PSI LF, 33 PSI RF, 31.5 PSI LR, 31 PSI RR. This gives just on the understeering side of neutral handling in steady state cornering turning left, and just on the oversteering side of neutral turning right, which I think can be solved by another half to one PSI in the left rear.
I run 33.5 PSI LF, 33 PSI RF, 31.5 PSI LR, 31 PSI RR. This gives just on the understeering side of neutral handling in steady state cornering turning left, and just on the oversteering side of neutral turning right, which I think can be solved by another half to one PSI in the left rear.
