Subject: Re: Balancing Act
Author: Patrick Hayes
Date: Aug 27, 2005, 9:41 AM
Post ID: 1719355950
Bruce Giller wrote:
| plugs wasn't do its job. I pulled the left side plug wire off and the engine continued to run with a slight drop in rpms (by audio only); slight increase when wire was re-attached. Pulled the right side plug wire and in about 3 revolutions, the engine died. Time to balance the carbs ?? |
Bruce: the later version loops had ports in the intake manifold to
allow for vacuum reading and accurate balance adjustment. The earlier
loops did not. Once you do a loop accurately using the vacuum system,
you will wonder how anyone can be accurate and successful the old way.
It is possible to retrofit newer intake manifolds to the older loops.
It is also possible to mill a small flat spot for sealing and to drill
and tap the existing manifold to use a vacuum port. Careful, not much
thread depth available. If you know a precision welder, you could build
nice aluminum lugs on the manifolds to allow for a better drilling and
taping spot. It takes VERY little change in cable or carb settings to
make a big difference in idle and roll-out performance. I know some are
successful with the old system, but for me, the speed and accuracy of
the balancing work can not be done other than by vacuum reading.
Patrick Hayes
Fremont CA