Crank sensor question...

[Bruce Plecan]

-----Original Message-----
From: Robert Humphris <r.humphris at indigo-avs.com>
To: 'diy_efi at efi332.eng.ohio-state.edu' <diy_efi at efi332.eng.ohio-state.edu>
Date: Friday, April 24, 1998 5:10 AM
Subject: RE: Crank sensor question...


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


You're sparking will be advanced or retarded,  you'll have to figure
out the timing light hook-up thou....
Cheers
Bruce      Yes, Cone Shaped Hats are polarity sensitive!.  If ya
                get it wrong you won't know if your coming or going!!..
>
>>----------
>>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.
>>
>>
>>
>>
>