Chris:
I have a 30 year old Sears 1hp compressor with a 12 gallon tank. It will still
build from 0 to 110 psi in two to three minutes. Can't say that I ever timed
it because it's never been an issue. There should be some sort of CFM rating
on your unit from which you could estimate how long it should take
to compress the air in your tank to 90. It sounds to me, though, that you have
a leak, either past the piston rings in the pump or somewhere in a feed line.
A leak in the line will make everything take longer. I've had that happen. 20
minutes is an unreasonable long time.
Chris King wrote:
> Today I finally got around to firing up the free compressor I got last year.
>It works reasonably well, but it does take a _long_ time to build up pressure
>(20 min from 0-90psi). It'll most likely be fine to run the finish nailer I
>bought, but I doubt if I could run air tools for any length of time.
>
> My question is - can I solve this by swapping out the compressor head (the
>piston unit)? The tank is faily large (don't know capacity, but is about a 4
>foot long 14" diameter cylinder). The motor is a 3/4HP unit. Harbor freight
>sells replacemet heads, but they start at 1.5HP. Will this work?
>
> TIA.
>
> -=Chris
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