Installing a Moroso Racing Vacuum Pump
Words and Photos by Jok Nicholson
This month I will install the racing vacuum pump from Moroso. There
are two reasons I have decided to install this unit. First, I like the
idea of having better ring seal and the resulting additional horsepower.
Second, due to using alcohol and running in a rather cool climate I
wanted the vacuum pump to help eliminate the moisture and alcohol contamination
of my synthetic race oil.
The vacuum pump will accomplish both things for me and we decided on
the Moroso #22640 3-vane Racing Vacuum Pump. The features that took
me to the Moroso unit was the reputation of Moroso as far as readily
available rebuild kits, customer service program in place, and quality
construction throughout the entire unit. The pump accepts #12AN fittings
so plumbing it into the valve covers will be easy.
The first thing you have to do is figure out if you have the room to
install the pump. It is about the size of a standard alternator. Then
you have to consider a method of getting the pulleys and drive belts
lined up. On Project 4-Link I have the Barry Grant belt drive fuel pump
and an East Coast mini-alternator already driven off the crank. I found
a place to mount the pump on the left side of the engine. The Moroso
Racing Vacuum Pumps come with an integral mounting bracket that attaches
to the rear of the pump. This bracket made it easy to fit to a motorplate
such as the one in my dragster.