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Venturi installation and measurement

Posted: Sun Apr 08, 2012 1:04 pm
by Leatherneck
The venturi top and bottom are not mirrored image of each other. One end is more beveled as the other end is more of a slope. Which goes towards the butterfly's?

Second question is there is not a number on them so how do I measure to find out what size I have and which end do you measure from? Thanks!

Re: Venturi installation and measurement

Posted: Sun Apr 08, 2012 7:16 pm
by sideshow
Normally there is a booster venturi (the high speed circuit) that needs to be near the choke point of the venturi. On Solex and Weber downdrafts the narrow point it away from the butterfly.

The OD should be the size of the butterfly or slightly larger, the size is the smallest size of the ID.