<VV> BackFiring through LH Carb

[S M]

A lean condition will cause that. Check the accelerator pump, and if that's OK, check deeper in that carb for blocked passageways. Although most of Grant's work is very good, I've seen some bad ones from him. One noted Corvair expert said that he went through 40 carbs to get one perfect pair, so you may have gotten one of the other 38...


----- Original Message -----
From: Bob Gilbert <bgilbert at gilberts-bc.ca>
Date: Sunday, April 29, 2012 4:19 pm
Subject: <VV> BackFiring through LH Carb
To: virtualvairs at corvair.org

> Hi,
> 
>  
> 
> Something odd has just started with my fresh 3.1 build. It will 
> idle happily
> all day long and rise smoothly up through 4000 RPM but when I 
> just blip the
> throttle , I get backfiring through the driver's side primary 
> carb. All of
> the sparking equipment is new; coil,  plugs, wires, 
> Pertronix II etc. The
> carbs are fresh from the Carbmeister. I've tried adjusting the 
> static timing
> to see if it makes an difference and it doesn't. For now I'm 
> running at 16
> BTDC static.
> 
>  
> 
> I've set the valves cold at half turn past zero leash.
> 
>  
> 
> Any ideas?
> 
>  
> 
> Thanks,
> 
> Bob
> 
>  
> 
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