18hp= pump?

I have a 18 hp engine that I am wanting to use for a vacuum recovery system. What pump would be recomended?

http://www.dresserroots.com/documents/URAI/urai_spec_s-12k84.pdf

You can put a pretty big Roots on 18 hp.

What can you expect to pay for a blower like that?

I have a URAI 36 on an 18-hp with plenty of power to spare. I recommend going with a larger engine then the blower states needed as it will bog down when your pulling a lot of water up. A roots 45 is about as large as i would go on an 18hp engine and it should be fine.

I have a "performance guide" on my website that can serve as reference..
Basically,
you can run about 400cfm through 2 hoses up to 400 feet each,
or 350cfm through about 500 feet of 2" vac hose.
The question, is how many tools do you want to run,
How many CFM do they require, and what distances will be most convenient.

Your jobsite, available tools, and team strength ON the SITE
is where you calculate your required performance. Eh ?

400cfm still allows you to reduce the engine-speed for quieter running,
without lugging the engine below its HP-curve.
350cfm has power to spare,
500cfm would waste gasoline, and drag it's feet at high-lift.
or run 4 tools at shorter distances.. 4 guys with 12" surface cleaners
could clean a bakery or locker rooms wicked-fast !

basicaly I have the 18 hp engine and want to make the most of it. It will be used for everything from flatwork to vacuuming out cars. Thanks for the input.

Do you have more than 1 pressure washer ??
Set it up for 400 to 450cfm, enjoy your "workaholism" with multiple wands.

A one-man-show would set it at 350cfm for really long hoses,
or 400cfm max, and run it at half-speed most of the time..
It will live longer, and quieter. Eh?