Air Compressor
Looking for a new air compressor for my National Tradewinds class A. My current compressor is great for tools and my car tires but it takes too long to air up the MH tires to 100psi. Looking for sugge...
Forum Discussion
Bobbo wrote:
Mine is the Porter Cable and I like it. I don't see why Craftsman won't be just as good. Be sure it is oil-free.
The thing that speeds up the process is the PSI it runs at. A 150 PSI rated compressor actually generates about 125 PSI. When you have 98 PSI in your tire and the compressor only generates 125 PSI, the air flows slowly because it is only 27 PSI difference. That is why the tire airs up faster, at first, when it is flat. It has a 125 PSI difference. The pressure differential is greater so the air flows faster. If you truly want FAST, get a (more expensive) compressor with higher PSI ratings. I know there are 200 PSI compressors, and there may be others.
It's a combination of this and the size of the tank. A big 100gallon shop compressor can transfer a lot of air before the pressure drops much. Plus the motor is usually able to put out a fairly large volume to keep up with any loss of pressure.
A small 6 gal compressor, will quickly lose pressure as air moves out of the tank to the tire and with a small motor, it won't replace it very fast.
For topping up the last 5p-10si, your average little 6 gal unit should be fine but if it's completely flat, expect it to take a while to top up. Hopefully you aren't going from completely flat very often.
