Tire Pressure

[dodge freak 2]

How in the world does one know what tire pressures to run on these 35-45 year old cars 

My ride had A/C but every little bit is gone, in the trunk is 5 amps and a heavy 12 inch sub woofer (the other amps are for the 4 speakers on the deck lid and each door has speakers, all hidden too).

My new tires are Goodyear Eagle  Response Edge, the max pressure is 44 psi....I used to run 30 psi with my old Goodyear Regatta but those max pressure was 35 psi. I learn with two old tires that any more than 28-30 psi wears the tires in the middle but I don't wanna learn the same way with these.

[Chryco Psycho]

it is kinda tough to sort it out you want full contact to the edge of the tire without unloading the center of the tire , I slide a piece of paper under the edge of the tires to see where it makes contact but it is more difficult to figure out the center contact

[dodge freak 2]

Hmmm, that paper trick sounds good. Maybe I start at 40-45 psi and work down with the paper--might even use the jack in back to take some weight off the back tires. Once I can slip the paper by part of the tire I would reduce the air pressure till it seems even and then reduce it a few more psi.

I also hear to just go 85% of max pressure but the paper idea makes more sense.

[71chally416]

Do a short burnout and look at the marks it leaves.  Too lines about the width of the tire apart and you need more pressure, one narrow strip in the center and you have too much, a nice equal black patch the width of the tire and you have the right pressure. 

[bb71challenger]

Do a short burnout and look at the marks it leaves.  Too lines about the width of the tire apart and you need more pressure, one narrow strip in the center and you have too much, a nice equal black patch the width of the tire and you have the right pressure.

I thought that was used just for the track? I used to do that but in my case the air pressure was usually quite a bit less than 32 psi, usually about 18-22 in my case.

[Aussie Challenger]

  Most tyres generally work between 28 to 32 psi, more pressure only needed when extra weight put in trunk. Pressures below 26 will usually see the inner & outer edges wear more. 

[Chryco Psycho]

every tire is different though