Lunge Motorsport
New Member
Greetings
I'm new to this forum and have enjoyed reading through the posts so far. I am a new owner of a 2020 3500 DRW but have owned a Ram dually in the past so have a little background to reference. My post today concerns empty tire pressure setting on my new truck and the procedure I have used on all my vehicles since the 80's to obtain the desired pressure. My experience was formed by setting up the chassis on an old BMW road race car back in the day. I use a digital laser thermometer that I also use for checking temps over a wide variety of applications. My truck is a heavily optioned Laramie Night Edition Cummins with air suspension, this is a completely stock truck with 500 miles. I will recheck after 1000 miles to see if there is any change due to break in of the suspension components.
Basically I run the vehicle for about 15 miles at highway speed until I achieve a stable tire temp, I choose a flat and straight road to avoid outer tire edge temp increase due to cornering. Prior to the testing I prepare a chart that I can record temps of all the tires in their proper location on the vehicle and across the tread of the tire in 3 locations inside, middle, and outside. I set and record the outside air temp and starting tire pressures prior to the start. After the tires reach temperature I will pull over to a safe location and log all the temps for analysis. My goal is to achieve equal tire temps across the tread of all tires. Starting pressure was measured with outside temperature at 53 deg F, front tires set to 75 cold, inside rear tires set at 55 and outside rears set at 50. I knew from my last DRW pick up that the inside rear tires loaded heavier than the outside so I started with a 5 psi differential. My ending pressures were still 75 psi on the fronts and the rears were 40/45 respectively outside and inside...I was never able to achieve an absolute even temp across the front tires but was looking for consistent, repeatable numbers, camber and toe settings are a strong influence on the tires. I was able to get good solid and even temps across the rears.
I have not yet had the opportunity to check loaded pressures but will record and report for those interested.
I welcome any comments.
Cheers
I'm new to this forum and have enjoyed reading through the posts so far. I am a new owner of a 2020 3500 DRW but have owned a Ram dually in the past so have a little background to reference. My post today concerns empty tire pressure setting on my new truck and the procedure I have used on all my vehicles since the 80's to obtain the desired pressure. My experience was formed by setting up the chassis on an old BMW road race car back in the day. I use a digital laser thermometer that I also use for checking temps over a wide variety of applications. My truck is a heavily optioned Laramie Night Edition Cummins with air suspension, this is a completely stock truck with 500 miles. I will recheck after 1000 miles to see if there is any change due to break in of the suspension components.
Basically I run the vehicle for about 15 miles at highway speed until I achieve a stable tire temp, I choose a flat and straight road to avoid outer tire edge temp increase due to cornering. Prior to the testing I prepare a chart that I can record temps of all the tires in their proper location on the vehicle and across the tread of the tire in 3 locations inside, middle, and outside. I set and record the outside air temp and starting tire pressures prior to the start. After the tires reach temperature I will pull over to a safe location and log all the temps for analysis. My goal is to achieve equal tire temps across the tread of all tires. Starting pressure was measured with outside temperature at 53 deg F, front tires set to 75 cold, inside rear tires set at 55 and outside rears set at 50. I knew from my last DRW pick up that the inside rear tires loaded heavier than the outside so I started with a 5 psi differential. My ending pressures were still 75 psi on the fronts and the rears were 40/45 respectively outside and inside...I was never able to achieve an absolute even temp across the front tires but was looking for consistent, repeatable numbers, camber and toe settings are a strong influence on the tires. I was able to get good solid and even temps across the rears.
I have not yet had the opportunity to check loaded pressures but will record and report for those interested.
I welcome any comments.
Cheers
