<VV> Balancing Carbs with TwinMax

[Larry Forman]

Hi Rick,
Try this link for tips on balancing Corvair carbs, as well as the shop manual:

http://www.corvair.org/chapters/chapter920/carb_balance.htm

The Dwyer null-centered vacuum gauge is about $60-70 but cannot tolerate 
any gas being sucked into it.  Other than that, it works extremely well and 
is accurate.  You should know that before attempting to balance the carbs 
using a fine gauge like that, you should take the slop out of the cross 
member and linkage arms/joints.  If you don't you will get errors due to 
that slop allowing one carb to open before the other.

I use the Dwyer gauge exclusively and very often.  Ken's approach works 
well and you can feel the performance improvement.  A good timing light is 
essential and getting the ignition system in order first is recommended, as 
well as checking the cylinder compression or performing a cylinder leakdown 
test first.

Tell us more about this gizmo and it's cost and availability.  What is the 
full scale reading and is it a null centered reading?  Is it analog, which 
would be best in my mind, or digital on a changing numbers display?

Thanks,

Larry


At 08:45 AM 9/4/2005 -0500, The Tysons wrote:
>I recently purchase a nifty electronic gizmo for balancing the carbs on my
>old BMW cycle.  This device detects pressure imbalance and displays it on a
>meter.  It appears to be quite sensitive.  It would seem to me that this
>device could be easily adapted to balance the Corvair carbs on my 110 hp '65
>Monza.  I'm wondering if someone could walk me through the necessary
>adjustments.  I'm never had great luck understanding or performing the
>"balancing act" as it's described in the shop manual.  If someone could
>advise me on where to start (throttle cross-shaft, idle screws, or ?) and
>when I adjust the length of the throttle rod on the left carb, I would be
>forever grateful.
>Thanks for the assistance.
>Rick T