new compressor pump

Just in case anyone is following along for their own knowledge, the pulley calculators on the web are great helps trying to figure out how to get the optimum speed for your compressor pump, especially when changing manufacturers and there is clearly a dimensional difference on the flywheel. Too slow poor output, too fast, will probably waste your reed valves extremely quick. The motor nameplate is just a piece of the puzzle.
 
not my first rodeo . i talk to the mfg before i do anything.
in case anyone is following this for their own knowledge call your mfg. at 1740 rpm i could run between 5.5 to 12 in pulley and still be ok . this aint rocket science .
 
One of the shops I service just picked up a new Mac compressor.. 5HP, and when you watch/hear it run, I swear it's running a million RPM's. These newer cheap compressors are working off of a very high rpm. You are probably not spinning it fast enough to produce the air it should.

However.. You are still better off rebuilding that Champion. IMO.
 
shine said:
not my first rodeo . i talk to the mfg before i do anything.
in case anyone is following this for their own knowledge call your mfg. at 1740 rpm i could run between 5.5 to 12 in pulley and still be ok . this aint rocket science .
Click to expand...
Yes you'll be ok, but it won't be working at optimum output hence the issue of lack luster performance. It truly isn't rocket science but to say something doesn't compare to something else they should be compared in the same context not one running at a lower percent.
 
You lost me somewhere Shine. I ran some numbers with my smaller Quincy with a 18" flywheel.

5.5" pulley with 1740 RPM's = 531 at the flywheel
12" Pulley with 1740 RPM's + 1160 at the flywheel

I don't care what the MFG says. That is the difference between a lot of air and not much air.

My 325 running 500rpms won't run the blast cabinet over 40 psi once the tank depletes. Before I slowed it down from 850ish RPM's it would maintain the Trinco cabinet at the 90psi I run it at. It should since it's rated for 17cfm at 175 with the higher rpm's.
 
the ir is running faster than the champion. smaller flywheel . it runs 838 rpms. the champion ran at about 820 .
 
Here's my champion 5hp with 80gal tank. I did this tonight showing the recovery rate from 0. I always time mine from cut-in to cut-out to make sure it's running as it should and has never changed from the day I bought it years ago. If the time increases then a valve more then likely took a shit but never have I had a problem the disc valves on my R series pump are the best you can get bar none. The motor RPM is higher then the pumps RPM and I'm sure would be differant than another manufactures
 
the ir is not as good of a pump. it has to spool up much higher than the champion. the champion runs around 750 .
 
I haven't looked into the T-30 since I got my current compressor and have looked into them since you posted this and wow they have changed since I looked at getting one. They have cheapened up something nasty. They were a good heavy duty unit back when I looked at either the T-30 or the Champion and chose the Champion. That pump needs to spin no less then 1575 rpm to get the CFM'S claimed, that is flying, I watched a youtube video of it at 1st start up and man that thing is crazy fast. The biggest down fall to a pump zipping along that fast is heat and oil in the air supply. The slower you can turn the pump the better off you would be.

So what can someone take away from this? Look for a slowest pump that will give you the CFM you need, more is better with a tank size that will hold a decent amount of reserve, no less then 80gal IMO.

Remember when it comes to this type of equipment, buy once, cry once.
 
shine;n83084 said:
87max , do you even bother to read before posting ?????
Click to expand...
Sure do, the lack of actual facts in here make it difficult to do anything but make assumptions. But it's your story tell it however you want.
 
well this new pump lasted less than 30 hrs. already leaking oil from the inner cooler tube. if i can get a refund they can shove ingersol rand .
 
first tech took the numbers and said it was within their range and would just be a little slow. second tech said i needed a bigger pulley. already at 6 in . so i spent another 600 dollars for a faster motor . now i'm at a 100 bucks short of a champion pump and this pos leaks oil . calling again tomorrow to see if i can just get a refund. doubtful but i will never purchase anything ir again.
dont get your hopes up trying to get them on the phone either. no better at returning calls either.
 
That's a dam shame. Sorry you have to go thru this but once you have top shelf it's hard to have anything less.
 
DATEC;n83167 said:
I haven't looked into the T-30 since I got my current compressor and have looked into them since you posted this and wow they have changed since I looked at getting one. They have cheapened up something nasty. They were a good heavy duty unit back when I looked at either the T-30 or the Champion and chose the Champion. That pump needs to spin no less then 1575 rpm to get the CFM'S claimed, that is flying, I watched a youtube video of it at 1st start up and man that thing is crazy fast. The biggest down fall to a pump zipping along that fast is heat and oil in the air supply. The slower you can turn the pump the better off you would be.

So what can someone take away from this? Look for a slowest pump that will give you the CFM you need, more is better with a tank size that will hold a decent amount of reserve, no less then 80gal IMO.

Remember when it comes to this type of equipment, buy once, cry once.
Click to expand...



I have about 560 gallons of tank capacity.. Is that sufficient.. LMAO!!!
 
You must log in or register to reply here.
Back
Top