<VV> Modified carbs performance question

[Joel McGregor]

Racers have said that extending the arms doesn't help.  If the venturi is bored to the same size as the throttle plate how will it pull fuel into the airstream?
Joel
-----Original Message-----
From: VirtualVairs On Behalf Of Grant Young via VirtualVairs
Sent: Sunday, August 25, 2019 1:38 PM
To: virtualvairs at corvair.org
Subject: <VV> Modified carbs performance question

I received a modified set of 140 carbs for rebuild that a customer purchased from another owner. They have been modified by increasing the venturi area to the same size as the throttle body area. The venturi cluster arms have not been extended. The other mods can be undone. But, before I spend time and charge for rebuilds that might not work as expected, I thought it best to check with those of you who have some experience with this. I have read that the step between the venturi and throttle body area is there to accelerate the flow and that cluster arms should be extended to allow them to operate properly and that idle quality and performance can otherwise suffer. 
Thanks for some insight.
Grant
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