Fw: [DML] Re: Alternator Question!

["Chris Parnham" <chrisparnham@xxxx>]

Some interesting facts.

Chris P....still looking for a bigger alternator!


----- Original Message ----- 
From: <dherv10@xxxx>
To: <dmcnews@xxxxxxxxxxxxxxx>
Sent: Monday, February 12, 2001 6:30 PM
Subject: [DML] Re: Alternator Question!


> Scott, Your correct that the car will only take what it needs as long 
> as the source can deliver. My builder told me that he test at 2000 ( 
> Factory 3000 ) rpm, 100amp fixed load, ( factory 80 amp load )and he 
> cranckes up a variable load on top of the fixed load till the 
> alternator reaches 13 volts. Lower RPM and all comes down in 
> proporation. That's also why we use a smaller pully for a faster spin 
> at lower rpm. Original used a small also. At that point 150 amps +/-. 
> I can't tell you exact, but here is what my builder told me this 
> morning.
> Current draw ( average ): 12vdc
> AC Compressor--16 to 18 amps
> Wire resistance for compressor add about 20%+ 3.5 amps
> De Lorean Cooling Fans= 28 to 30amps
> Head lamps depending on dim or bright=10-15 amps
> Battery to charge and to keep hot=20-30amps,you can charge as low 3v. 
> Other,Resistance in wire all over + radio,dome,door=5amps.
> On the low side the total is 82.5 amps
> On the high side the total is 101.5
> As we all know most all these thing may not be on at the same time. I 
> have not tested all this but it was just a quik summation. Now factor 
> in heat and how much does it drop. Watch how your gauge,up and down, 
> hot weather to cold weather, idle to running, loaded to unloaded and 
> cold alt in morn to hot after running a while. The idea as I see it 
> is to keep the needle above 13 volts as much as you can in the worst 
> case. I think DMCJOE said something about 11 or 12 volts a while back 
> before you start running other trouble. I'll let him expound on that 
> if he wants to. But:Texas heat, 95 Degree out side, crusing stop and 
> go at low RPM at night with lights on and air on. That's about the 
> worst. 
> If you look at the shop manual, I don't think there is any way to 
> meet the spec. Oh. and they are talking at 68 degree.
> John
> 
> 
> 
> --- In dmcnews@xxxx, "Scott Mueller" <scott.a.mueller@xxxx> wrote:
> > If I remember correctly, the alternator will only produce the 
> amount of
> > current that the car requires. The rating 105 Amp or 150 Amp is 
> the maximum
> > rated current for the alternator. I am curious though, how much 
> current can
> > the wiring handle between the alternator and the battery?
> > 
> > Scott Mueller
> > DOA/DMCNEWS
> > 002981
> > ----- Original Message -----
> > From: Stian Birkeland
> > Subject: [DML] Alternator Question!
> > 
> > 
> > >
> > > I have one question regarding the "new" alternators. I see that 
> there are
> > > various suggestions for replacement alternators...
> > >
> > > DeLorean Midstates offers a 105 Amp alternator as do Grady and 
> DMC Joe.
> > > Mr. Hervey now offers one with even a higher output (150 I 
> believe it was)
> > >
> > > My question is:
> > > Is it advisable to replace the original alternator with one with 
> a much
> > > higher output than the original one?
> > >
> > > Is there a "limit" as to how high output should be in the 
> DeLorean?
> > > What difference is there between the 105 and 150? I have 90amp 
> with
> > FanZilla
> > > and I "feel" its enough power for all the systems in the car.
> > >
> > > Can a very high alternator output damage anything in the 
> electrical
> > system?
> > > What about the battery's condition?
> > >
> > > Just curious...
> > >
> > > Best wishes
> > > Stian Birkeland
> > > Norway
> > >
> > > VIN # 06759 (w/original 90amp Motorola)
> 
> 
> 
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