GS Engine
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Thread: GS Engine

  1. #1
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    Default GS Engine

    I am in the process of assembling my GS engine. Now it transpires that I have a choice of An SEV or a Ducellier Dissy. Can anyone advise. Also I would like to eliminate the points if possible, is thee a suitable kit available
    Woody

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  2. #2
    1000+ Posts Ken W's Avatar
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    Ducellier all the way. Vac advance moves the outer points over the inner stationary points to reduce wear. Points Gap can be more easily measured and vac advance threshold can be set by the little cam wheel. Just make sure you have the fibre washer that sits on top of the points pivot between the points arm and the spring clippy retainer.

    Also have a suck on the vac advance capsule to make sure you don't have a big air leak due to a ruptured diaphram.

    Also depends which has less wear on the centrifugal advance mechanism.

    My preference is to stay away from the cassette points and go for an much more positive points location.

    We have a Ducellier for our resto project and it is in great shape.

    1977 GS 1220 Pallas

    Cheers, Ken
    Last edited by Ken W; 22nd November 2018 at 07:51 PM.
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    I have had a Hot Spark kit (Hall Effect magnetic switch, neither points nor capacitor) in my Ducellier distributor for maybe 5 years now. Brilliant.
    JohnW

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    In reinforcement of the above: Ducellier is a better distributor & HotSpark seems a good conversion. The only conversion I could find for SEV was an Ignitor 2. The unit seems a poor one. In my Djet I have had two units fail & have resorted to points & a CD transistorised ignition module. The HotSpark in my 4CVG Ducellier has been reliable.
    Last edited by 4cvg; 24th November 2018 at 02:17 AM.

  5. #5
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    It looks like I will be using a Ducellier. Thanks Guys. So far I have been unable to find a suitable Hotspark kit. The one shown on the Website is a mirror image of mine.
    Woody

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    Hi Woody, looks like the Pertronix EP-142 works with the Ducillier 4411B - https://www.speedwaymotors.com/PerTr...er,301112.html

    Not sure how extensive the distributor mods required are.

  7. #7
    Too many posts! JohnW's Avatar
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    Looks good, even if the GS isn't a V4.... You would imagine they have the direction of rotation sorted out.

    I can't speak too highly of getting away from points....
    JohnW

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    Renault R8 1965
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    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

    National Co-ordinator, Renault 4CV Register of Australia

  8. #8
    Fellow Frogger! AxGT's Avatar
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    Yes, Their EP-141 is clockwise rotation, while this one is CCW

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    When setting the timing check at idle & 2500rpm. The large advance spring post can bend with age retarding the low speed timing if set only at 2500rpm creating a low speed flat spot. The solution is to bend the post until timing is correct at idle & 2500rpm.

    Richard

  10. #10
    1000+ Posts gerrypro's Avatar
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    Bending the post out wards increases tension on the centrifugal advance weights. The timing curve is then more retarded until higher rpms are reached. Bending the post inwards reduces spring tension and increases the advance at lower rpms.
    Cheers Gerry

  11. #11
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    I seem to remember 10* at idle & 33* at 2500 Rpm. Haynes manual will confirm if that is correct or not ?

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    After some reflection I think I will stick with the points (Price and uncertainty being considerations) I will use a transistor switch to take the load of the points These devices were very common 30y ago but I still have some thing at the back of the cuboard.I notice that the modern MOSFETs make the design of these devices much simpler.

  13. #13
    1000+ Posts Ken W's Avatar
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    Woody,

    Latest circuits use IGBT devices as they are much more robust apparently - that's a bit of a shock to us older electronics buffs.

    Cheers, Ken

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    Thanks for your interest Ken. I am currently using a Vishay MOSFET Vds max is 650V, Imax 40A and importantly Rds max is .064ohms.This gives a very good on voltage. It has a neat TO 247 package A bit hard to better at $10.
    Woody

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