[DeTomaso] Hooking an MSD 6AL Rev Limiter to disengage the A/C Compressor
Rob Dumoulin
rob at dumoulins.net
Thu Jun 9 15:46:23 EDT 2016
I would like to add both safeguards. Revs could be independent of high
pressures. I could be ripping it up to 6500 RPM in second gear and not hit
the pressure limit or could be traveling 130 MPH in 5th at 4K RPM down my
driveway with no airflow and hit the pressure limit
Rob DuMoulin
904.476.8744
rob at dumoulins.net
www.kbsi.co
http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
On Thu, Jun 9, 2016 at 3:37 PM, Larry Weston <lplugw at hotmail.com> wrote:
> Is it the revs or the high side pressure build up that does in the
> compressor?
>
> Could it be as easy as using a trinary switch high side limit switch to
> cut out the compressor clutch?
> __________________________________________________________________
>
> From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
> Dave <davel at emspace.com>
> Sent: Thursday, June 9, 2016 3:28 PM
> To: detomaso at server.detomasolist.com
> 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 --------------
I would like to add both safeguards. Revs could be independent of high
pressures.A I could be ripping it up to 6500 RPM in second gear and
not hit the pressure limit or could be traveling 130 MPH in 5th at 4K
RPM down my driveway with no airflow and hit the pressure limit
Rob DuMoulin
904.476.8744
[1]rob at dumoulins.net
[2]www.kbsi.co
[3]http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
On Thu, Jun 9, 2016 at 3:37 PM, Larry Weston <[4]lplugw at hotmail.com>
wrote:
A A Is it the revs or the high side pressure build up that does in
the
A A compressor?
A A Could it be as easy as using a trinary switch high side limit
switch to
A A cut out the compressor clutch?
A A
A __________________________________________________________________
A A From: DeTomaso <[5]detomaso-bounces at server.detomasolist.com> on
behalf of
A A Dave <[6]davel at emspace.com>
A A Sent: Thursday, June 9, 2016 3:28 PM
A A To: [7]detomaso at server.detomasolist.com
A A Subject: Re: [DeTomaso] Hooking an MSD 6AL Rev Limiter to
disengage the
A A A/C Compressor
A A Hey Rob
A A A 6AL only limits the coil drive output.
A A A 6AL-2 or a 6AL plus has a Retard Step output
A A "Retard Step. This retard is activated when 12 volts are applied
and
A A rpm
A A is above the Step1 Rpm value."
A A It's meant to keep those 14:1 motors from blowing the teeth off
the
A A ring-gear,
A A but just program it to go true at 4000 and do your thing with a
relay.
A A dave
A A On 6/9/2016 6:19 AM, Rob Dumoulin wrote:
A A >A A A It appears engine revs killed my Sanden rotary
compressor.AA That
A A or it
A A >A A A was a cheaper build.AA Regardless, my new motor will rev
even
A A higher
A A >A A A and this time I am installing a high-pressure shut-off
valve.A
A A In
A A >A A A addition, I'd like to use the rev limiter feature of the
6AL to
A A shut
A A >A A A off the compressor so I won't kill another one.
A A >A A A I have heard of such a mod but have not seen technically
how to
A A make it
A A >A A A work.AA Anybody know what MSD parts are needed and how
to hook it
A A up to
A A >A A A the A/C?
A A >A A A RobA
A A >
A A >
A A >
A A > _______________________________________________
A A >
A A >
A A > Detomaso Forum NO LONGER Managed by POCA
A A > Posted emails must not exceed 1.5 Megabytes
A A > DeTomaso mailing list
A A > [8]DeTomaso at server.detomasolist.com
A A >
[1][9]http://server.detomasolist.com/mailman/listinfo/detomaso
A A [2]DeTomaso Info Page
A A [10]server.detomasolist.com
A A This is the DeTomaso mailing list, a free and open forum for
the
A A discussion of issues surrounding all DeTomaso automobiles. This
is an
A A unmoderated mailing list ...
A A >
A A > To manage your subscription (change email address,
unsubscribe, etc.)
A A use the links above.
A A >
A A > Members who post to this list grant license to the list to
forward
A A any message posted here to all past, current, or future members
of the
A A list. They also grant the list owner permission to maintain an
archive
A A or approve the archiving of list messages.
References
A A 1. [11]http://server.detomasolist.com/mailman/listinfo/detomaso
A A 2. [12]http://server.detomasolist.com/mailman/listinfo/detomaso
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References
1. mailto:rob at dumoulins.net
2. http://www.kbsi.co/
3. http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
4. mailto:lplugw at hotmail.com
5. mailto:detomaso-bounces at server.detomasolist.com
6. mailto:davel at emspace.com
7. mailto:detomaso at server.detomasolist.com
8. mailto:DeTomaso at server.detomasolist.com
9. http://server.detomasolist.com/mailman/listinfo/detomaso
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11. http://server.detomasolist.com/mailman/listinfo/detomaso
12. http://server.detomasolist.com/mailman/listinfo/detomaso
13. mailto:DeTomaso at server.detomasolist.com
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