<VV> Rochester HV - blowing out passages

Seth Emerson sethracer at aol.com
Wed Aug 29 17:45:57 EDT 2018

If you are shooting Chemtool or Gumout (etc.) down the passageway at the end of the cluster mounting face - the passage that feeds the idle mixture around, you should do it with the idle mixture screw removed -but by tapping your finger (on and off) onto the screw hole, you will force the mixture out the passages into the venturi area, off and on. There are a couple of different passages that need to be clear. First, the hole that the idle mixture screw engages, and eventually plugs if screwed in enough, and second the transfer port, which is a slot on the H-series, just above the throttle plate. PS - Be real careful as you do this, the small passages will, in essence, extend the nozzle tip. You don't want to "Shoot your eye out!", with whatever you are shooting through.


-----Original Message-----
From: Matt Nall via VirtualVairs <virtualvairs at corvair.org>
To: virtualvairs <virtualvairs at corvair.org>
Sent: Wed, Aug 29, 2018 2:11 pm
Subject: Re: <VV> Rochester HV - blowing out passages

BUNK!    Blow in the mixture hole and it cleans both passages at the same time!

Matt Nall
Charleston, Oregon


-----Original Message-----
From: Doug Mackintosh via VirtualVairs <virtualvairs at corvair.org>

I think I remember someone saying when you blow out the passages in the Rochester HV, there is a passage that may not get cleared unless you leave the mixture screw in it. Did I understand that right? And which passage doesn't clear? Is it the transition slot passage?

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