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V65 - Strange timing issue

Discussion in 'Small Block' started by Dr. Jake, Apr 27, 2019.

  1. Dr. Jake

    Dr. Jake Just got it firing!

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    Location:
    Copenhagen, Denmark
    Hey all. Looking for input. I decided to look in to the timing of my V65C in an efford to cure a tendency to run a bit too hot. I found the timing to be way advanced. I set it to factory specs +7 degrees (measured both stativ and with timing gun) and found it was nearly impossible to start and ran like cr.p. After messing around a bit i set it back to where it was (which also roughly corresponde with the factory mark on the timing plate). It now starts and runs fine with 22degrees of static advance??

    I don’t get it.

    There is no markings on the flywheel but I am absolutely confident that TDC is correctly identified using a piston stop. I run stock setup with points. The mechanic advance mechanism is working properly.

    Whats going on?

    Jake
     
  2. V700Steve

    V700Steve High Miler GT Contributor

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    Location:
    Atlanta area, GA
    Some flywheels then had no marks but there should have been a square punch mark at 7 and a round one at 10 for V35/50 motors. When you drop advance down to 7 motor will run slower and richer, to keep same rpm have to raise speed screw and adjust idle mixture to compensate. I used to install non epa mixture screws. For USA emissions they had a long narrow tip. I have not experienced the problem you have, make sure valve rockers are adjusted correctly ahead of time. Could be the point gap closed up while adjusting timing also, nature of the beast.
     
    Dr. Jake likes this.
  3. Dr. Jake

    Dr. Jake Just got it firing!

    Joined:
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    Location:
    Copenhagen, Denmark
    I could under no circumstances make it run even near properly at 7 degrees as per the workshop manual - points gap dead on and lots of idle screw messing about. Now it starts and runs excellent at 22 degrees advance. Just seems strange

    Oh well. It runs

    Jake
     

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