RE: [DML] Power issues (electrical)

["John Hervey" <john@xxxxxxxxxxxxxxxx>]

Group,
The higher the amperage rating of the alternator output the higher the turn
on speed of the alternator. (TOS is the point at which the alternator starts
putting out current not voltage, Voltage is already there.)

Example, Take my D110, which will average 110 to 120 amps output current
hot. The TOS will be about 600 to 700 RPM'S, but at what amps. Accelerate to
about 1100 to 1500 RPM's with my alternators and you will have the max
output of any of the lower amp alternator. In other words your out of juice
( if ) you needed more.

The Motorola and the Ducy also have a low TOS because of the low amps
output, but they have to get up to 1500 to 1800 RPM's before they reach the
70 to 80 max amps out. This is marginal in most cases.

Now, Take the D140 or D150, TOS at about 950 RPM's and accelerate up to the
same about 1100 to 1200 RPM's and you will see a big difference and it will
keep generating current up to about 2500 RPM's where it will about peak out.
Again, the current ( Not Voltage )is attributed to the special winding of
the stator we wind and matching of the rotor in the alternator and put in a
package with the smaller pulley.

If you go out right now and under normal conditions and put a volt meter
across the battery terminal on any car and you don't read above 12.66 volts
to 12.85 volts then the battery either isn't getting a charge or it can't
hold the charge. Either way you have a low battery condition and the dimming
or low voltage condition will exist.
Low dimming will also happen when your at low RPM's and drawing more current
than the alternator is putting out at that speed.

All of the rated out put of my alternators are rated in the hot condition
not cold like others and alternators get hot in about 2 minuets after the
car is running. Also, the higher the ambient temperature the faster it will
reach it's rated output current. Naturally the colder the ambient
temperature the higher the rating.
Hope this helps.
John Hervey
www.specialtauto.com




-----Original Message-----
From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx]On Behalf
Of Dick Ryan
Sent: Monday, May 23, 2005 11:06 AM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: Re: [DML] Power issues (electrical)


I have one of John's alternators on my car.  While I
am quite pleased with it, I do notice that at idle I
also get some dimming of lights if other electrical
systems are on.  In a current issue of Car Craft (I
think), there is an article about "one wire"
alternators vs "three wire" alternators.  Without
going into the details of the theory, it was stated
that one wire alternators always have to get up to
some minimum engine speed rpms before they truly begin
charging.  The number quoted, if I remember correctly,
was around 1500 rpms.

Dick Ryan
VIN 16867



--- stainlessilusion <5n-@xxxxxxx> wrote:
> I had time to clean all the major electrical
> contacts in the engine
> bay. I now get a higher reading on my voltage guage.
> But, the lights
> still dim on the A/C panel. I'm going to try to run
> a ground directly
> from the battery to the grounds on the A/C panel and
> see if that will
> work. I have the D150 in my car that not too long
> ago was tested by
> John and was fine. What else should I be checking?
> Thank you all!
> -----Dani B. #5003
>
>
> --- In dmcnews@xxxxxxxxxxxxxxx, DMCVIN6683
> <dmcvin6683@xxxx> wrote:
> > You need a new alternator. My car had a similar
> problem. When i rolled
> > up or down my windows the radio would turn off and
> on.
> >
> > I installed a D110 alternator from
> www.specialtauto.com and it all went
> > away plus everything worked better.
> >
> > Mark V
> >
> >
> > On May 18, 2005, at 11:38 AM, stainlessilusion
> wrote:
> >
> > > I've seen this discussion hit the list a few
> times but I can never
> > > seem to figure mine out. My stereo cuts out when
> I have my A/C on, the
> > > stereo comes on and then off every few minutes
> to every few seconds.
> > > Same thing happens if I turn on the fan switch
> all the way to 4 real
> > > fast, or if I'm rolling down/up my windows at
> the same time. I can
> > > also see when I turn the fan switch each
> number-the dimmer the panel
> > > lights get. Is this a ground thing?  I'm using
> the green/white wire
> > > for the main power, and the violet for
> secondary. All my grounds go to
> > > the mounting bracket itself. Didn't used to be
> this bad ever
> > > Thanks
> > > guys, Dani B. #5003
> > >
> > >
> > >
> > >
> > >
> > >
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