That thing is redonkulous! I envy you. Note other users: this is not what people mean by two stage. Though it is a two stage. Sort of.

 

Nope its two 15 HP single stage pumps mounted on a 240 gallon tank. Its hell on the electric bill 120 amp just for it running at 208 3 Phase. ( Two 60 amp drops ) I only have that unit due to a great deal on it. No I did not post the pictures trying to me a ***. I'm only trying to show that a GOOD single stage can do the job. Part of my job is to size and set up compressors for branches in the company. So I have spent many hours with compressor people learning the ins and outs of how to set up and maintain a good air supply and how to size up the compressors to the room and machines. However its kind of easy for me here as we only use 3 different machines and I know the CFM's needed for each, add a extra for blow guns and maintenance use ( air tools ) and pick a nice new screw compressor with chiller and dryer onboard that's output it higher and say there ya go

There has been some good info here. Only you know what your budget is and what you can afford. If its not much try to save up. Used is kind of a gamble at times unless you know the last user and have a idea on service use and how it was maintained. However if its a good brand name and a good pump it can always be rebuilt. Unless there a big old hole in the side of it. Single stage or 2 stage look at the CFM output and buy a GOOD branch name. Quincy, Champion, ect. Try to stay away from the CP, sears, and the box store units. Oil-less are very loud and do not have a very long service life. Get something that got real oil in the crank case. Change the oil often! Keep it in a place that can get some air flow around it to help it run cooler.

I would say 60 gallon tank and 15 CFM would be the smallest to look for. 80 gallon and about 20 CFM would be ideal. I had a 5 hp 2 stage at 17 CFM on a 80 gallon tank. Was a nice unit but too small for me blasting. It can be done but I blast a lot. Bigger would be kind of a wast unless you plan on sand blasting then the sky is the limit. My big stuff is sand blasted by a guy who has a 375 CFM diesel powered screw compressor! Talk about blasting some sand! He does a AWESOME job on frames!

That's just my 2 cents worth

 

I'm bringing back this thread because I'm finally going to get a compressor and just want to make sure I'm making the right decision. I've looked everywhere; internet, big box stores, tool catalogs, ect. The one that has seemed to catch my eye is a Campbel Hausfeld G2815 with a 7.5 horse 2 stage motor and 80 gallon tank. The price is currently around $1500 (on sale for christmas). The reason I'm thinking about going with this one is it seems to have higher CFM's than most of the other 7 horse models, and the price seems real reasonable. Has anyone owned a 2 stage campbel hausfeld or heard if they're any good? Some of these companies want over two grand for a 5 hp compressor with lower cfm's. I definetly don't want to spend more than two grand so that is my budget. ny responses are greatly appreciated!

 

I have the same compressor it kicks butt. Never any wait when running the blaster, or die grinder.

in the summer you will need an air dryer it kicks out 27 CFM. Set the sut off @ 140 instead of 175. Other wise you need to regulate it to air tools. I ran my IR231 on 175 & it sounded like a chain saw.

 

Thank You! It's always nice to hear from someone who has experience with a certain item before I purchase it. The price seems real fair and it has the highest cfm's of any 7.5 horse compressors I've found. Looks like that's the one I will order in the a.m. unless someone say's their junk before then.

 

I got mine used from a body shop for around a grand. It ran 4 bays. In my shop it keeps up fine with media blasting & body shop sanders. It moves allot of air, in the summer you will need an air dryer for heavy use & auto drain tank valve.

All the parts are available at any compressor shop or the website:

http://www.chpower.com/

It has great recovery & is pretty quiet in operation.


Where are you getting it?Amazon.com: Campbell Hausfeld G2815 7-1/2 HP 2-Stage Compressor: Home Improvement

 

Probably grizzly, they're on sale for around $1500 plus $144 to ship. I've been impressed with grizzly's prices and customer service. All of my wood shop tools are grizzly brand. This truck thing is just a hobby but at least I have a hobby that I can use as a write off! I could probably get something smaller but I always buy stuff a little bigger than what I need. Do you by any chance know if it matters where I put the compressor? My wood shop is heated, and then I have the other half I use for cold storage. I live in wisconsin so winters are cold. I would like to put it in the storage part to save space and run an air line through the wall but I don't know if the cold will hurt it (oil viscosity, ect..)

 

If you put it in the cold side build a small room for it & keep a couple lights on 200w for heat & a fan to bring in fresh air from the heated side of the garage. It is best to keep it in the heated side, then just run a new intake into a flowmaster muffler. (some fab required)
You will never here it.

 

Flow master muffler?! Never thought of that. That was the reason I was thinking about puting it in the cold side, I don't want a compressor screaming in my ear all the time.

 

Ingersoll 5hp 15cfm 100% duty cycle- 10 yrs and counting

 

Hey torkum, how does that keep up with the air tools and do you do any blasting with it? Just curious, too late for me I ordered the 7.5 hp this morning but it was a tough decision between that and a 5 hp model

 

No problem keeping up with tools or my blaster. I had a side business sandblasting automotive parts for 4yrs and it was the compressor I used. The main problem is moister, I use steel pipe in the shop and 3 water seperators to eliminate the problem.

 

When I plumbed my shop I used a tip from Jon Kosmoski's book and used 1 1/2" pipe and took the air feeds from the TOP of the pipe. Just put a Tee in facing upwards, then use a reducer, one street L and an elbow to get it facing down into your seprator/filter/regulator. At the end of the line run an elbow into a ball valve to drain the line. I have NEVER gotten water from my filter that way. If you think abut it, you actually can't, since water goes to the bottom, and only clean air comes out the top. Simple and effective. Of course everyone who has ever seen my setup tells me that 1 1/2" is overkill, but I don't get trash in my paint, nor water in my filter, let alone my gun or tools.

 

Here is the way we are going to lay out the shop. 1.5" is a little overkill. We will use 1" for the main lines. 1.5 from the compressor to the dryer 12' away.

I got a little carried away with the dryer it is a 50cfm for hot air.

If you do not have a dryer use this layout.





This is what we are going to do close to it.




Edit:

Ben you will not be sorry with the 7.5 it is real quite & only takes 2 min to catch up. I have not used the flow master yet as it is pretty quiet. I used that on my old 5 hp years ago. Just a little fab required.


.

 

WOW! Thanks a ton for all the info guys! Compressor is being delivered tomorow afternoon, merry christmas to me! I think I've decided to put it in the cold storage part, but build an insulated room around it and put a grill of some sort in the wall to let the heat go into that room. So it will basically be in it's own room. That way I can save space in my workshop and not worry about hearing it.