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Timing by ear....

Discussion in 'Series Land Rovers' started by Marmaduke, Apr 16, 2021.

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  1. Marmaduke

    Marmaduke Well-Known Member

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    Come on then, what am I listening for???
    I've set it with a timing light to 6 degrees and it's burping and farting especially on the over run. If I go past 6 degrees the engine speed increases but I don't know if this will cause issues... So please can someone tell me what I'm listening for?
    Also vacuum pipe on or off?

    Cheers Rob
     
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  2. Colthebrummie

    Colthebrummie Well-Known Member

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    I wouldn't worry about degrees. I always time by ear, fastish revs as if the choke is out and vac pipe on. Turn the dizzy either way until the engine speed is at its highest then cut revs to tick over. A little adjustment maybe on tick over until it's idling nice and smoothly. Make sure the mixture screw, throttle stop and valves are adjust correctly. Don't forget to do the dizzie clamp up again, I forgot to that once.

    Col
     
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  3. doriz

    doriz Well-Known Member

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    Can you tune a... 5FFD4592-E8A9-489B-961B-1ADE527C8CB8.jpeg
     
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  4. Marmaduke

    Marmaduke Well-Known Member

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    So it doesn't matter if the timing is way above 6 degrees?
     
  5. Marmaduke

    Marmaduke Well-Known Member

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  6. Marmaduke

    Marmaduke Well-Known Member

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    And are you implying my beautiful series 2a is a hairdresser mobile?:mad:
     
  7. doriz

    doriz Well-Known Member

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    Ha ha, I assumed you were trying to interfere with the suck,squeeze, bang, blow cycle on the J’eep :D. Polagies, forgets you have a real’un anorl.
     
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  8. Stanleysteamer

    Stanleysteamer Well-Known Member Full Member

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    I would imagine the 6 degrees was for the days of leaded fuel, so that will be quite a long way out anyway.:rolleyes:
    We are also assuming the dwell angle, i.e. points gap is correct, unless you've changed it to electronic.
    I'd do it the same way as Col only I'd push the revs higher, which would annoy the neighbours, which is why I always take it to a layby on a country lane I know. At higher revs, you can be sure that all the advance is in and each change to the position of the dizzy has a more noticeable effect on the revs.
    Don't be surprised if at tick-over the advance is well different. This is caused by different fuel and the wear in all moving parts of the engine and ignition system.
    Oh, and don't forget to make sure the engine is at normal temperature
    Once you get the timing right, you may well have to alter the tick-over at the carb Especially to make sure it starts from cold.
    All the best wiv it!
    I miss doing this, what with modern cars!:):):)
     
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  9. Hicap phill

    Hicap phill Well-Known Member

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    I was way out with electronic ignition. But more than 6 deg.
     
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  10. Marmaduke

    Marmaduke Well-Known Member

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    Yeah it'll be way way more than 6 degrees
     
  11. Stanleysteamer

    Stanleysteamer Well-Known Member Full Member

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    When unleaded came out Wifey had a Citroen BX 1600. It was supposed to be able to run on both so we put unleaded in and retarded the ignition as we were all told to. But it didn't run too well and as the spark plug gap opened up, it started to backfire until it got so bad it actually exploded the first silencer, with an enormous bang.
    So me and my neighbour, who ran a garage, dug deeper into how far back to retard it, and the truth was that it was much more than we were told by Citroen or anyone else.
    Stopped the backfires!
    Expensive way to learn the lesson.
    @Marmaduke Don't know what engine you have but this may be of interest
    https://www.lrukforums.com/threads/ignition-timing-settings-for-unleaded-2-25-petrol.106480/
     
  12. Marmaduke

    Marmaduke Well-Known Member

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    My Jeep runs absolutely spot on, tis the refined American electrics:p
     
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  13. Hicap phill

    Hicap phill Well-Known Member

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    That’s it BOBB go on strike ;)
     
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  14. Marmaduke

    Marmaduke Well-Known Member

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    Thanks but it's as clear as mud I'm afraid:oops:
    I'm running an Accuspark distributor and new coil with a weber carb and lead substitute fuel.
    I think my next day off I'm going to have to have a good day of tinkering with it as I guess the carb setup and timing all need attention
     
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  15. Marmaduke

    Marmaduke Well-Known Member

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    BOBB will be getting torched at this rate:eek:
     
  16. doriz

    doriz Well-Known Member

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    Just wait till yer heated tampon dispenser plays up :D
     
  17. TS2304

    TS2304 Member

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    Remember that that 6 degrees figure is also the static time - as you said you're checking it with a strobe I assume you're checking the timing at idle which will mean the advance should be greater than 6. By how much will depend on what idle speed you're at and, as the others above have implied, what advance you like. I tried to get a consensus in an earlier thread about what timing people were running before I started fiddling again but there's little agreement I think as it's so variable depending on what your motor's like.
    Best advice is as above really - get it up to a decent rate of revs then twist the dizzy til the revs peak, then back off a couple of degrees and that should be you about right. Then adjust your idle speed and carb again if need be to get a decent running at idle. Go for a decent run in it and put the engine under some strain (ie up a hill) and listen out for any pinking. If you hear some back off the dizzy a couple more degrees and repeat til the sound goes away and you should be fine.
     
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  18. tottot

    tottot Well-Known Member

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    If you have not got one a Gunson Colortune is very useful in getting the mixture right.
     
  19. Marmaduke

    Marmaduke Well-Known Member

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    Might have to look into one of them...
     
  20. Stanleysteamer

    Stanleysteamer Well-Known Member Full Member

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    I have one and have to say that I am not sold on them.
    I personally prefer doing plug cuts.
    But then most of the time I have used them has been with worn carbs. :rolleyes:
     
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