Bosch 0 231 146 101 (VW 113 905 205 AL) curve in Tune+
 Public Forums   Commencé par Damjan Mozetič   2023-04-09 08:26:17 +02:00   Commentaires: 1    Vu: 3733

  1. Hello,

    I've been trying to recreate the curve for the distributor I had on my '73 1300 beetle, and I am looking for confirmation that I'm doing this correctly, especially the vacuum advance. According to my calculations:
    mechanical advance
    0 deg @ 1120 rpm
    9 deg @ 1500 rpm
    22.5 deg @ 3700 rpm
     
    vacuum advance
    0 deg @ 80 mm Hg = 10 kpa … 90 kpa
    10 deg @ 26.5 kpa ... 73,5 kpa
    10 deg @ 40 kpa ... 60 kpa

    Now, the original distributor should be timed at 7.5BTDC, so I have added 7.5 degrees to the mechanical advance figures above.
    Does it all make sense? I think I am getting too much total advance when revving high (34-35 deg).
    Damjan Mozetič, 2023-04-09 08:26:17 +02:00
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