Crank sensor question...

[Robert Humphris]

Sounds sensible to me... now what happens if I reverse the polarity of
my CSH??

>----------
>From: 	Bruce Plecan[SMTP:nacelp at bright.net]
>Sent: 	23 April 1998 15:00
>To: 	diy_efi at efi332.eng.ohio-state.edu
>Subject: 	Re: Crank sensor question...
>
>-----Original Message-----
>From: Robert Humphris <r.humphris at indigo-avs.com>
>Subject: Crank sensor question...
>>I have found an interesting little mod for my type of car ( Renault
>>5GTTurbo ) which is too simple for words... but I cannot work out why it
>works.
> It has been found that if you swap the wires from the crank sensor, to
>>the ignition module, the car pulls like a train from 3000rpm upwards.
>>The engines used to run out of steam at around 6000rpm, but with the wire
>swap, it just keeps pulling...
>>Anyone got any ideas why this works like this?
>>Rob Humphris
>
>If the pickup up in the dist uses a coil+reluctor then it generates a
>A/C signal.  The module has a specific theshold when it triggers.
>The faster you spin a reluctor in a coil, the greater the voltage, and
>the earlier the signal.  IE in a GM HEI it's a bit over 1.5degrees per
>1,000 rpm.   So depending on how it's wired/triggered you now
>have a rpm sensitive advance or retard.  Hook a timing light to
>a plug wire, and make the switch if the timing retards, then you
>know it's retarding as a function of rpm.
>Bruce      Just bought a larger Cone Shaped Hat, the Palm
>                Impressions are still getting larger in my forehead.
>
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