504 pulse sensor for cruise control
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  1. #1
    Member pugperson's Avatar
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    Default 504 pulse sensor for cruise control

    Hi all,

    Having fitted various Command cruise controls to several of my classic cars, and living out in the sticks where 99% of driving is at 100 or 110 km/h, I'm really missing having cruise control on my '77 504 GL manual. I find these units to be exceptionally good once properly adjusted.

    I was about to order an AP60 kit when it dawned on me that the Peugeot tailshaft is enclosed and therefore doesn't lend itself to the addition of magnets and a sensor to get the PPM (pulses per mile) in the appropriate range. An awkward solution is fitting multiple magnets and a sensor to a rear driveshaft, but it's inelegant on several levels.

    The Pug doesn't have an integral speedometer pulse generator, so I guess the alternative is the addition of a pulse generator to the speedo cable, either at the gearbox or speedo end.

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    Has anyone done such a fitting, and have any wisdom to impart?

    Cheers!
    Neil

    1977 504 GL

    (see it at http://www.grouseguitars.com.au/peugeot )

  2. #2
    Demannu-facturing! Demannu's Avatar
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    Yep, I've had Command cruise controls on a couple of my 504s.

    I extend the cable for the sensor to reach the rear diff, fit the magnets to the inner CV and use the included bracket to mount the sensor onto a couple of the bolts on the diff sideplate (I get longer bolts to compensate).

    Agree entirely, those Command systems are awesome.

    If you need pics of my setup, I'll take one tomorrow.
    Scotty

    Melbourne - Dandenong Ranges

    1956 Peugeot 403 - 'Francois' - resto project

    1969 Peugeot 504 - 'Pascal' - daily driver project

    1970 Peugeot 404 Utility - 'Brutus' - resto project

    1978 Peugeot 604 - as yet unnamed - V6 on straight LPG

    1987 Peugeot 505 - as yet unnamed - project car

    1999 Peugeot 406 Coupé - 'Chloe' - 5 speed manual

    2011 Peugeot 3008 XTE HDi - 'Zoe' - hatchback on steroids

    2014 Peugeot RCZ - 'Remy'

    1999 Range Rover 4.6 HSE - 'Grover' - tow car

  3. #3
    Fellow Frogger!
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    Quote Originally Posted by pugperson View Post
    An awkward solution is fitting multiple magnets and a sensor to a rear driveshaft, but it's inelegant on several levels.
    I had thought youwere right about this since the drive shafts turn so much more slowly than the gearbox output shaft. Thought about it a bit more with Demannu's comment. Obvious in hindsight -- the controller doesn't need to know the actual speed, it just aims to keep the pulse rate constant. The pulses will not be coming as fast, but they'll still be coming at about 10/sec rather than 40/sec at a cruising speed. That should be fast enough.

    Have fun,

    Rob.

  4. #4
    Demannu-facturing! Demannu's Avatar
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    You just set up the magnets as per the instructions for a Front Wheel Drive - whereby the axle turns at road speed. 2 magnets has proven to work perfectly well for me on 504s and 505s for speeds from 40km/h to at least 130km/h.
    Scotty

    Melbourne - Dandenong Ranges

    1956 Peugeot 403 - 'Francois' - resto project

    1969 Peugeot 504 - 'Pascal' - daily driver project

    1970 Peugeot 404 Utility - 'Brutus' - resto project

    1978 Peugeot 604 - as yet unnamed - V6 on straight LPG

    1987 Peugeot 505 - as yet unnamed - project car

    1999 Peugeot 406 Coupé - 'Chloe' - 5 speed manual

    2011 Peugeot 3008 XTE HDi - 'Zoe' - hatchback on steroids

    2014 Peugeot RCZ - 'Remy'

    1999 Range Rover 4.6 HSE - 'Grover' - tow car

  5. #5
    Member pugperson's Avatar
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    Thanks Scotty and Rob. If pics are no problem, Scotty, I'm sure they'll be of use to anyone reading this thread, and I'm sure I'll find it helpful too. Another Command is about to be ordered!

  6. #6
    1000+ Posts robmac's Avatar
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    Quote Originally Posted by robs View Post
    I had thought youwere right about this since the drive shafts turn so much more slowly than the gearbox output shaft. Thought about it a bit more with Demannu's comment. Obvious in hindsight -- the controller doesn't need to know the actual speed, it just aims to keep the pulse rate constant. The pulses will not be coming as fast, but they'll still be coming at about 10/sec rather than 40/sec at a cruising speed. That should be fast enough.

    Have fun,

    Rob.
    That's why you need the "double magnet" scenario mentioned in installation manual.
    The less one interacts with rude, ignorant, critical and argumentative members. The more peaceful life becomes.

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