Tried doing a search, but only returned results about D/R and Slick pressure for the track.
A little background.
About a month ago I purchased two new summer radial rears for my 87GT. At the time, the tire shop was telling me how they recently got nitrogen, and asked if I wanted to try it in the tires, as they said it's not supposed to react to tempature change or leak out like air. I said "sure why not", figuring if it doesn't work as described, oh well it will be easy to deflate and replace with air again. Anyways, so the rears have nitrogen, and I'm including this incase it makes a difference somehow to PSI recommendations.
I check my tire pressure monthly for loss, and did that now. The rears had a whooping 40PSI in them. I deflated them to 30PSI, as that's what I've always run on all 4 tires. I've always practiced going with the sticker on the door jam for proper inflation of stock tire size. That sticker is long gone on my car, and I've realized the 30PSI I've been using was simply my decision. What was the stock recommendation for the 15" turbines in 1987? Also, since I don't have the stock tire size front or back for my car, I was wondering if the PSI should change any?
Fronts are 225/50/16 - Air
Rears are 245/50/16 - Nitrogen
Keep in mind that I'm looking for gas mileage and tire life, over contact surface footprint for launches and acceleration.
A little background.
About a month ago I purchased two new summer radial rears for my 87GT. At the time, the tire shop was telling me how they recently got nitrogen, and asked if I wanted to try it in the tires, as they said it's not supposed to react to tempature change or leak out like air. I said "sure why not", figuring if it doesn't work as described, oh well it will be easy to deflate and replace with air again. Anyways, so the rears have nitrogen, and I'm including this incase it makes a difference somehow to PSI recommendations.
I check my tire pressure monthly for loss, and did that now. The rears had a whooping 40PSI in them. I deflated them to 30PSI, as that's what I've always run on all 4 tires. I've always practiced going with the sticker on the door jam for proper inflation of stock tire size. That sticker is long gone on my car, and I've realized the 30PSI I've been using was simply my decision. What was the stock recommendation for the 15" turbines in 1987? Also, since I don't have the stock tire size front or back for my car, I was wondering if the PSI should change any?
Fronts are 225/50/16 - Air
Rears are 245/50/16 - Nitrogen
Keep in mind that I'm looking for gas mileage and tire life, over contact surface footprint for launches and acceleration.