[DeTomaso] Hooking an MSD 6AL Rev Limiter to disengage the A/C Compressor
Dave
davel at emspace.com
Thu Jun 9 20:02:33 EDT 2016
No, no, no - I had my head up my butt.
The MSD 8950 is the right part.
That line on the MSD6AL-2 is an input.
It has the use I was talking about, but you connect it in parallel to
the starter solenoid input to back out the advance while cranking.
Larry - it just took me a while to notice the extra weight on my shoulders.
Dave
On 6/9/2016 2:00 PM, Dave wrote:
> Good.
>
> Probably only a hundred bucks if you didn't want the other -2 features.
>
> dave
>
> On 6/9/2016 1:22 PM, Forest Goodhart wrote:
>
> You could use an MSD 8950 rpm switch and relay for this.
> Forest
> __________________________________________________________________
>
> From: Dave [1]<davel at emspace.com>
> To: [2]detomaso at server.detomasolist.com
> Sent: Thursday, June 9, 2016 12:28 PM
> Subject: Re: [DeTomaso] Hooking an MSD 6AL Rev Limiter to disengage the
> A/C Compressor
> 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 --------------
No, no, no - I had my head up my butt.
The MSD 8950 is the right part.
That line on the MSD6AL-2 is an input.
It has the use I was talking about, but you connect it in parallel to
the starter solenoid input to back out the advance while cranking.
Larry - it just took me a while to notice the extra weight on my
shoulders.
Dave
On 6/9/2016 2:00 PM, Dave wrote:
Good.
Probably only a hundred bucks if you didn't want the other -2 features.
dave
On 6/9/2016 1:22 PM, Forest Goodhart wrote:
You could use an MSD 8950 rpm switch and relay for this.
Forest
__________________________________________________________________
From: Dave [1][1]<davel at emspace.com>
To: [[2]2]detomaso at server.detomasolist.com
Sent: Thursday, June 9, 2016 12:28 PM
Subject: Re: [DeTomaso] Hooking an MSD 6AL Rev Limiter to disengage the
A/C Compressor
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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