[Tigers] Alternator Conversion

Fri Sep 15 09:58:30 MDT 2017

Hi Theo,

Nice job, someday I hope to re-do my installation like that.  The GM alt 
and CAT bracket is quick and dirty though.  ;-)

Like Theo points out, a single 10 gauge wire is not enough for 70amps, 
and 10 gauge is the largest you can find in
the auto parts store, so you have to double it up.

Gary

On 9/14/2017 9:11 PM, Theo Smit wrote:
> HI Joel,
> I mounted a 70 amp mini alternator (a Denso) when I installed my crate 
> motor. The nice thing was that its depth allowed me to put it in front 
> of the right head so it's not sticking way up and outboard like the 
> original generator (and like my previous alternator setup). I still 
> achieved the original pulley alignment front-to-back.
>
> Minor issues: 1. I had to make my own mount and pulley sheave. 2. The 
> alt was designed for a Toyota application and I did not have the 
> proper plug to connect to the charge control connections. I used 
> individual spade connectors instead.
>
> But, I think it turned out pretty nice looking in the end... everyone 
> has their own tastes.
>
> Minimum amps:
> Lights should be about 140W total for running plus headlights plus 
> another 50W for brake lights, so call it 20 amps max. blower is maybe 
> 5 amps. Wiper is at most 5 amps. MSD, a couple of amps. So you're 
> looking at 40A maximum at idle (the MSD may draw more once the RPM 
> goes up).
>
> For a 70A alternator you should rewire the large lead that goes to the 
> solenoid (and then to the battery) to be 2x 10 gauge or a single 6 
> gauge wire. It's also a good idea to provide at least one redundant 
> ground wire connection from the engine to the chassis (besides the one 
> that's off the bell housing to the transmission tunnel).
>
> Theo
>
> ------------------------------------------------------------------------
> *From: *"tigers" <tigers at autox.team.net>
> *To: *"Gary Winblad" <garywinblad at comcast.net>, "Ron Fraser" 
> <rfraser at bluefrog.com>, "tigers" <tigers at autox.team.net>
> *Sent: *Thursday, September 14, 2017 11:48:23 AM
> *Subject: *Re: [Tigers] Alternator Conversion
>
> Ron/Gary
>
> I agree with the 'ugly' factor and have been trying hard to keep a 
> stock configuration/look but functionality has now taken hold. And 
> taping up new wire harness does not appeal to me so 'dummy' up the VR.
>
> Narrowing down the alternator has been tough.  Do I need a 'small 
> case' alternator in order to fit?  What is the opinion regarding MIN 
> amps at idle to run lights/defrost blower/wipers/MSD box.  My 
> calculation was around 70 if I were to add a radio so could get by 
> with less.
>
> HEI Ignition:  12 amps
> Head Lights/tail lights - 10 amps
> Halogen bulbs - 10 amps each - so 20 on head lights
> Electric fuel pump - Holly Red - 2 amp reporting but saying at least 5 
> amps
>
> 47 amps plus room to grow if add electric cooling fan or radio, so 
> about 70 best guess at idle.
>
> Bean dip or on the right track?  Still have not narrowed down 
> Alternator size that 'might' fit the CAT alt bracket $119 + $35 
> membership fee.
>
> Joel Martin
>
>
>
>
>
> On Thursday, September 14, 2017, 12:23:57 PM EDT, Ron Fraser 
> <rfraser at bluefrog.com> wrote:
>
>
> Gary
>     I originally made the Dummy VR to clean up the wire harness at 
> that point.  The article I read before I started removed the VR then 
> bolted, taped and shrink wrapped the wire harness.  I thought that 
> sounded too ugly.
>
> -----Original Message-----
> From: Tigers [mailto:tigers-bounces at autox.team.net 
> <mailto:tigers-bounces at autox.team.net>] On Behalf Of Gary Winblad via 
> Tigers
> Sent: Thursday, September 14, 2017 11:30 AM
> To: Joel Martin <jmartiniii at yahoo.com <mailto:jmartiniii at yahoo.com>>; 
> Tiger List Serve <tigers at autox.team.net <mailto:tigers at autox.team.net>>
> Subject: Re: [Tigers] Alternator Conversion
>
> I just went to Summit Racing, they have just what you want, and in 
> chrome no less.
> I hung it with a CAT club bracket, rough copy of the MK2 bracket in 
> aluminum.
> I ran the one wire to the battery terminal on the solenoid.  The 
> largest gauge wire at the auto parts store is really not large enough 
> for 70amps, so I doubled up two strands.  I also put a 70amp fuse in 
> line but that broke..need to fix that...
> Don't know why you want a dummy VR?  Just remove it.  I forget what I 
> did with the wires.. I'll look when I have a chance..
> Gary
>
> On 9/13/2017 2:02 PM, Joel Martin via Tigers wrote:
> > Hello All
> >
> > After 2 voltage regulators (VR) and 1 rebuild on the generator, I am
> > throwing in the generator towel.  I have read Ron Fraser 2003 article
> > on doing the conversion with a 1965 style ford alternator.
> >
> > I would like to go with about a 70 min amp one wire AC Delco and
> > making the VR just a dummy.  Can someone recommend the AC Delco
> > alternator part number that would have the built in regulator?  I
> > release a new bracket will need to be made.
> >
> > I would also like to buy or trade for a radiator overflow tank with
> > brackets.  I also need the fan shroud if anyone has one to complete
> > the engine compartment.
> >
> > Thanks in advance
> >
> > Joel Martin
> >
> >
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