Venturi installation and measurement

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Leatherneck
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Venturi installation and measurement

Post by Leatherneck » Sun Apr 08, 2012 3:04 pm

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!

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Re: Venturi installation and measurement

Post by sideshow » Sun Apr 08, 2012 9:16 pm

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.
Yeah some may call it overkill, but you can't have too much overkill.

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