Questions tagged [pressure]

Physical force applied over an area. Frequently referring to the force that compressed air exerts on the interior of a vehicle's tires and expressed in units such as pounds per square inch (psi) or Newtons per square meter (1 Pascal).

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12
votes
7answers
42k views

Should the inflation pressure for low profile tires be the same as for regular tires?

I always thought that even if you go the large wheel + low profile tire route one should keep the pressure to what's recommended by the manufacturer. However I noticed that some people swear by ...
14
votes
4answers
5k views

Why nitrogen and not carbon dioxide is used in critical tire applications?

In critical applications tires are inflated using pure nitrogen (link). But carbon dioxide (CO2) is a larger molecule (will leak slower from the tire), as well as inert (will not oxidize rim and will ...
11
votes
1answer
77k views

Checking Tire Pressure when the tire is warm or cold

Witnessed a recent debate about what is the appropriate temperature to check tire pressure at. The debate centered around warm or cold, there wasn't an exact temperature given by any of the parties. ...
6
votes
1answer
8k views

Difference between fuel pressure and fuel rail pressure

In OBD PID wiki page, there are 2 PIDs listed: Fuel pressure and Fuel rail pressure. Are both of them the same? Can someone please give an elaborate explanation of it - What exactly are they ...
2
votes
0answers
154 views

Can pressure caused by temperature cause ignition coils to unseat?

I've got a Rotax engine that looks like this from the top: The ignition coils look like this when removed: Recently two of the three ignition coils unseated after approximately 10 minutes of ...
1
vote
1answer
70 views

How much to inflate essentially unlabeled tires?

My trailer tires are labelled only with the following: Carlisle made in USA 6.90-9 That's it - there is no max PSI, # of plies, load rating, or any other information at all that I can see. The ...