[DeTomaso] Hooking an MSD 6AL Rev Limiter to disengage the A/C Compressor

[Dave]

Hey Rob

A 6AL only limits the coil drive output.

A 6AL-2 or a 6AL plus has a Retard Step output
"Retard Step. This retard is activated when 12 volts are applied and rpm 
is above the Step1 Rpm value."

It's meant to keep those 14:1 motors from blowing the teeth off the 
ring-gear,
but just program it to go true at 4000 and do your thing with a relay.

dave


On 6/9/2016 6:19 AM, Rob Dumoulin wrote:
>     It appears engine revs killed my Sanden rotary compressor.A  That or it
>     was a cheaper build.A  Regardless, my new motor will rev even higher
>     and this time I am installing a high-pressure shut-off valve.A  In
>     addition, I'd like to use the rev limiter feature of the 6AL to shut
>     off the compressor so I won't kill another one.
>     I have heard of such a mod but have not seen technically how to make it
>     work.A  Anybody know what MSD parts are needed and how to hook it up to
>     the A/C?
>     RobA
>
>
>
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-------------- next part --------------
   Hey Rob

   A 6AL only limits the coil drive output.

   A 6AL-2 or a 6AL plus has a Retard Step output
   "Retard Step. This retard is activated when 12 volts are applied and
   rpm is above the Step1 Rpm value."

   It's meant to keep those 14:1 motors from blowing the teeth off the
   ring-gear,
   but just program it to go true at 4000 and do your thing with a relay.

   dave


   On 6/9/2016 6:19 AM, Rob Dumoulin wrote:

   It appears engine revs killed my Sanden rotary compressor.A  That or it
   was a cheaper build.A  Regardless, my new motor will rev even higher
   and this time I am installing a high-pressure shut-off valve.A  In
   addition, I'd like to use the rev limiter feature of the 6AL to shut
   off the compressor so I won't kill another one.
   I have heard of such a mod but have not seen technically how to make it
   work.A  Anybody know what MSD parts are needed and how to hook it up to
   the A/C?
   RobA


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