has anybodyever used one on itbs, i have heard that they can create up to 2 lbs of boost sometimes and just wondering if it is wirth doing, which pump would be a good one to use, i know moroso makes a couple.

 

Vacuum pumps don't create any boost.They are used to evacuate the crankcase and make power by increasing piston ring seal and reducing pumping loses.The Moroso unit is good.The Jones is a better piece (also more expensive). http://www.jonesracingproducts.com/