<VV> vacuum advance adjustment

[Jim Corey]

Thanks all for the wake up.  Let me go back and CAREFULLY set up the carbs again.  I'm obviously getting vacuum at idle.

Finch's book clearly says "follow steps exactly with no attempts at short cutting to save time."   I was rushing.

J Corey
'63 Corvair Convertible 
'62 Greenie
'64 Coupe
'66 Sedan
All running as daily drivers
  ----- Original Message ----- 
  From: Sethracer at aol.com 
  To: jcorey at escapees.com 
  Sent: Thursday, February 19, 2009 11:31 PM
  Subject: Re: <VV> vacuum advance adjustment


  In a message dated 2/19/2009 9:11:54 PM Pacific Standard Time, jcorey at escapees.com writes:
    I set the idle and balanced the carbs on my 62 Greenbrier.  Nice even idle, approx. 650 RPM.  When I reconnect the vacuum hose to the advance, it pulls the advance, and the RPM climbs.  I recall (vaguely) an "adjustment"  --  using a socket and a hammer to change the diaphragm tension.  More enlightenment, please.

  I don't think adjusting the tension will help. You need to work on the carb balance some more. At that idle speed, you shouldn't have the throttle plate opened past the vacuum port feeding that advance unit. You do have the hose to the advance unit hooked the the right-side carb vertical port, right? Not the horizontal port. The Corvair, as produced, should have zero vacuum at the advance unit at idle. It will be hard to get a stable idle with vacuum at that port. You have enough Corvairs that you probably already know all this, but I had to mention it.

  Seth Emerson

  C's the Day! - Corvair, Camaro, Corvette





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