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Re: [T3] Generator Voltage Regulator


On 20 Feb 2001, at 22:29, Leon Martinez B. wrote:

> This
> regulator is a solid state type, epoxy filled and with
> very large semiconductors pressed into a heatsink; the
> bottom of the regulator has a small box that looks 
> like a circuit breaker. It looks odd but space age
> to me. It is stamped 14 volts 30 amp .
> Have any of you ever seen one of these or used 
> one? This seems like a perfect direct replacement. 
> It works very well with no mechanical movement and
> may take many hits before replacement. My original 
> BOSCH regulator seemed to be the one that came with
> the car because it had a tag with a date code of 
> 1968 and at the bottom it had a very old fasioned
> gold plated diode.

I think someone mentioned a new Bosch solid state version, but no 
one has described it as completely as you have. I have yet to see 
one. I hope they are as good as they look.

If yours was still the original one, then it should have died long ago. 
I don't think many of the originals lasted longer than 15-20 years. 
You will probably find that your FI now runs differently and you may 
get better performance and fuel economy if you put your FI stuff 
back to original conditions.

The old mechanical VRs died slowly over a period of years with a 
slow decline in the generator output voltage. In a warm climate the 
reduced charge in the battery would never be noticed. The low 
system voltage results in (for some reason) a richer and richer 
mixture which will eventually make the car annoying or impossible 
to drive.

If you have done things to compensate for this, your engine, with 
the new VR, will now be running too lean. As you know, this can 
be hard on it, so you should check into it right away.

Did you notice a change in gas mileage when you replaced the VR?

-
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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