Giulietta charging system modifications

[BEast750F@domain.elided]

Lewis,

The Lucas system is really not much worse than the Bosch, DC generating 
system.  Which is to say that the Bosch isn't much better than the Lucas!  

My opinions:

1) theoretically, positive earth is superior to negative ground.  The 
overwhelming deficiencies in available technology make this a moot point.  
Unless you use the stock Lucas equipment, convert to negative ground.

2)  The control boxes used for positive earth systems are not happy when used 
on negative ground systems.  They will have a short and miserable life.  The 
generators do not seem to care (if polarized correctly).

3)  DC generators are inherently inferior to AC generators.  If you are going 
to the expense and trouble of modifying the system for efficiency, put an 
alternator on it!  Nippon-Denso makes a pretty little unit that is a willing 
slave.  Yes, the halogen lights will bright, at last.  Double the output, 
half the problems.  Throw down the cash, and do it.

4)  Most old cars have bad wiring.  Do yourself a favor and make sure the 
battery is really connected to "ground."  That rusty bolt in the trunk is 
usually a poor substitute.  If you are serious about this, make the existing 
wire from the battery to the starter a ground cable.  With an eyelet crimped 
(auto electric shop) and soldered on each end, it will go from the new 
battery cut off switch, on the negative post, to a starter mounting bolt on 
the bellhousing.  An auxiliary ground strap goes to the stock bolt on the 
trunk floor.  Double-ought (00) multi-stranded welding wire may be used for 
the new positive cable.  The same crimping and soldering procedure will 
secure an eyelet on the starter end and a bronze positive battery terminal on 
the other.  Say good-bye to voltage drop problems.  Wait until you hear the 
starter!  Make sure you have a good wire, with no resistance, from the 
alternator to the starter.  

You will still be heckled -- certainly for the reversible changes you have 
made to your car.  When your fellow, vintage car friends complain that you 
have your brights on, you can politely tell them. "Sorry, old chap, but those 
ARE my dipped beams."

Bill

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