Air Pressure

[joesbruiser]

Sorry guys for all the dumb questions I ask on here but this going around a corner and stopping fast is a far cry different than my drag racing,Rock Bouncing,and Restoring antique car back ground.



Ok so here we go, I tossed a set of 265/35/20 BFG rivals on the front of our C-10 for the Autocross @ the GoodGuys Columbus event in a few weeks. I know the current wheel is a little too narrow for the tire ,its only 8.5 wide,But can anyone give me a good starting point for front tire pressure?
If it helps the truck is 3220 LBS and the front is about 900LBS a corner.
I can tell with what little we have drove the truck in the last couple of days that it turns in and sticks a ton better with this tire over the old tires. I am very impressed so far.

[1966longroof]

Well obviously with a narrower wheel, the tire will balloon in the center. So start with a lower pressure, say 25-30lbs. Drive the truck. Then, check tire temps. If the center is warmer/hotter than the edge, you still have to much air. So take some out. And vice-versa, if the center is cooler than the edges.....add air.

[71RS/SS396]

Sorry guys for all the dumb questions I ask on here but this going around a corner and stopping fast is a far cry different than my drag racing,Rock Bouncing,and Restoring antique car back ground.

Ok so here we go, I tossed a set of 265/35/20 BFG rivals on the front of our C-10 for the Autocross @ the GoodGuys Columbus event in a few weeks. I know the current wheel is a little too narrow for the tire ,its only 8.5 wide,But can anyone give me a good starting point for front tire pressure?
If it helps the truck is 3220 LBS and the front is about 900LBS a corner.
I can tell with what little we have drove the truck in the last couple of days that it turns in and sticks a ton better with this tire over the old tires. I am very impressed so far.

Do NOT go below 29 lbs with the Rivals per BFG engineers, you will damage the tire if you do. I usually start out between 32-34 cold and then adjust up or down depending on the track surface. Lower the pressure to which ever end of the car needs more grip.