[NoVa-Corvairs] tech question

[latin81 at comcast.net]

Daniel,

Perhaps a dumb question, but is there a leak where the carb balance tube goes?  Are your base gaskets in good shape?

To find a leak, I sometimes spray a little starting fluid around a carburetor and listen for changes in idle speed as the fluid gets sucked in, or spray some WD40 and see if it temporarily plugs up an air leak.  You can also use an unlit propane torch, although I've found this to be less effective unless the leak is HUGE.  Sounds like yours might be huge.

Best of luck!

John McMahon

-------------- Original message -------------- 
From: "Daniel Goldberg" <goldie at danielgoldberg.net> 

> Curt, 
> 
> I put my hand over the left side primary and there's very little suction. 
> 
> My Corvair's idle has been somewhat erratic. On Saturday I tuned it and set the 
> timing. I also installed the carb stabilizing kit I purchased from Lon Wall in 
> 2003 (really, I purchased it from Lon Wall: I was in McMinnville, OR at the 
> Corvair Underground and he took my money). My 'Vair is now running very well, 
> though since Oklahoma sells only 91 octane gas I have some pinging (will retard 
> the timing a bit to rectify -- or are there other suggestions?). 
> 
> However, my idle is still somewat erratic. Sometimes it's over 1000 rpm, 
> sometimes under 500. I'm thinking the fact that there's so little suction on the 
> one side is a source of the problem. 
> 
> No? 
> 
> 
> > ----- Original Message ----- 
> > From: "Curtis Shimp" 
> > To: novacc-list at corvair.org 
> > Subject: Re: [NoVa-Corvairs] tech question 
> > Date: Wed, 20 Jun 2007 08:12:31 -0400 
> > 
> > 
> > Daniel: 
> > 
> > Before we go into the possible places for a leak, and there are some, 
> > what is it that make you think that you have a vacuum leak? 
> > 
> > Curt 
> > 
> > On Tue, 19 Jun 2007 22:06:03 -0400 "Daniel Goldberg" 
> > writes: 
> > > Why would a primary carb that's snugly tightened have a vaccuum leak? (The 
> > > line to the vaccuum advance is also properly plugged up.) 
> > > _______________________________________________ 
> > > Novacc-list mailing list 
> > > Novacc-list at corvair.org 
> > > http://www.vv.corvair.org/mailman/listinfo/novacc-list 
> > > 
> > 
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> 
> > 
> 
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