Topica Loopframe_Guzzi Archive
 

Subject: Re: Generator replacement

Author: Charles Mullendore

Date: Mar 8, 2001, 4:01 PM

Post ID: 1705784173

Hi Brian,
I was thinking about using an 850T cam in my project Ambo's motor. Couldn't
the drive gear on an Ambo/Eldo distributor be changed to one for a dual point
"distributor"? I haven't looked into this fully yet, but it looks like it
should work. Anyone know if the shafts are the same size on both and if this
is possible? Mark?

Charlie

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Tom and others,
Thanks for all the comments about installing a VW generator or
alternator.
The reason I want to go with a non-standard setup is because in my
Eldo restoration I am installing 1000 cc cylinders and a B-10 cam. This
cam was designed for the Tonti-frame bikes, and so the worm gear at the
end of the cam drives the distributor at twice the speed of an Eldo cam.
This means that I will have to go with a dual-point distributor setup
(which also means that I can use an electronic ignition system), but the
problem with that is that the distributor body will not clear the stock
generator. Because of this, I am looking for a setup which is smaller so
that I can mount the dual-point distributor. I would prefer an
alternator over a generator for the reasons already stated, but a
generator would be fine as long as it clears the distributor.
That said, I would very much like to see how that VW generator was
made to work.
Thanks,
Brian
'74 Eldo
'78 T3

Tom Bowes wrote:
 
Todd M. Nordwig wrote:
 What would be the advantage of an alternator
on a loopframe vs the generator? The advantages
in general?

Todd

Well, Todd, there are many advantages to having an alternator rather
than a generator in nearly any vehicle application, not just for
loopframes. The advantages would be, in no particular order:

1) Rated output at lower RPM's than a comparable generator.

2) No commutator to wear out.

3) Reduced brush wear due to the fact that on a generator the armature
(rotor) output is carried by the brushes. On an alternator the brushes
ride on slip rings and carry the field current, which is much lower.

4) Modern alternators usually have the voltage regulator built in.

5) Higher amperage output from a similar package size.

6) Less "hash" and electrical noise.

All that having been said, there is one HUGE disadvantage in trying to
graft an alternator to a loopframe. It is nearly impossible to find one
that will directly bolt in place of the generator. Therefore,
installation of an alternator will probably adversely affect the looks
of what is becoming a "classic" bike.

Tom

'70 Ambassador
'82 V50-III
Shelby Township, Michigan

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