<VV> Carburetor problem?

[S M]

You don't set the balance with the idle mixture screws! Set them both at 1-1/2 turns out to start and don't stray from that by more than 1/2 turn generally... usually out a little more. I'd count the turns in until they're seated gently to see where they are now, before removing them. It doesn't mean they're set properly, I'm just curious. 


Balance at idle is set by the idle speed screws. Balance at 2000rpm is set with the adjustable link on the left carb. 


I agree with Matt that the left carb seems to be suffering from water in the gas, but will add that the carbs likely need balancing. It wouldn't hurt to do a rebuild on both, using the CORSA Tech Guide to make bench adjustments on them before reinstalling. 


Put a quart of Methyl Hydrate in a half tank of gas to alleviate the water issue. 


yea, Vairily ... Shaun 

----- Original Message -----

From: "MarK Durham via VirtualVairs" <virtualvairs at corvair.org> 
To: "Matt Nall" <patiomatt at aol.com> 
Cc: "Virtual Vairs" <virtualvairs at corvair.org> 
Sent: Thursday, July 23, 2015 6:46:24 PM 
Subject: Re: <VV> Carburetor problem? 

I agree with Matt, sounds like a carb problem. When you back out the idle 
mixture screw, make sure you screw it back in the same, and I would do both 
carbs. When I did mine, gas shot straight up out of the carb throat, so 
stand back! 

Set the screws as before, of if you don't remember set at 2 1/2 turns out 
then adjust for best rise and balance with the unisync, do this a couple of 
times, each time getting the tune finer and more perfect. 

Mark Durham 
Hauser, Idaho 
62 Monza coupe Red/Red 4 speed 

On Thu, Jul 23, 2015 at 2:51 PM, Matt Nall via VirtualVairs < 
virtualvairs at corvair.org> wrote: 

> -----Original Message----- 
> From: Jim Waddell via VirtualVairs <virtualvairs at corvair.org> 
> 
> 
> Until a few days ago my 65 Monza Convertible (110 
> engine, 
> Powerglide transmission, 64,000 miles) ran just fine. 
> I guess I made 
> her mad at me by pulling the right front wheel 
> and brake drum to see if I could 
> see what was making that brake 
> grab occasionally. Her response is from the 
> engine at the opposite end 
> of the car! 
> At half throttle and above, she seems 
> to behave just fine. 
> 
> 
> ==================================================================================== 
> 
> 
> Sure sounds like moisture in the gasoline......... on the offending carb 
> [ that runs better when you spray cleaner in ] remove the idle MIXTURE 
> SCREW and blow low pressure air in... then replace / rest I/M screw... 
> 
> 
> If it was doing just the opposite, not running well at higher rpm.... then 
> we would tell you to rev the engine and put your hand over the carb..... 
> thereby helping to clean out the Mainjet. 
> 
> 
> Good luck! 
> 
> 
> ps the rubber gaskets on top will not hurt anything if pieces fall into 
> carb throats. One on each side this time!!! ggg 
> 
> 
> Matt Nall 
> Charleston, Oregon 
> http://tinyurl.com/The-Corvair-Patio 
> 
> http://tinyurl.com/Matts-Tech-Pages 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
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