Tire pressure on 1987 z31 with rb25swap

[CerberuSlol]

So I do have another question, what should my tire pressure be at I'm running 20's in front 21's in rear my car is a 1987 nissan 200zr with an rb25swap don't know if that matters.The tires are marked for 40 psi so I would think it should be around 36 rear maybe 30 front? but not sure exactly was hoping someone here would know.

[nissangirl74]

Tire pressures can remain the same.

[CerberuSlol]

Tire pressures can remain the same.

aight thanks nissan girl wasn't sure

[evildky]

Pressure marked on the tire sidewall is the max for that tire and has nothing to do with the pressure you should be running on a specific car. Stock the car should run around 35 psi (most cars are int his range) and this is where I'd start and I'd keep an eye on shoulder roll or uneven wear and adjust accordingly.

[CerberuSlol]

Appreciate the help. Checked it the rears were at 37 and the front were 34.

[nissangirl74]

Tire pressures can remain the same.

aight thanks nissan girl wasn't sure

When we put the RB in the S30, we just went by the manufacturers recommendations.

And this

Pressure marked on the tire sidewall is the max for that tire and has nothing to do with the pressure you should be running on a specific car. Stock the car should run around 35 psi (most cars are int his range) and this is where I'd start and I'd keep an eye on shoulder roll or uneven wear and adjust accordingly.

[AZ-ZBum]

Stock, Nissan recommended 28 to 32 in the tires. 28 for mostly city driving, 32 for mostly freeway driving. I've always run about 30.

Just check the tires and look for uneven treadwear to show if you're running too much or too little.