Verklaard wel waarom mijn motor warmer dan normal liep,
is dit waar? 30 graden BTDC ipv 7,5 graden?
* The 009 Distributor -
009 (centrifugal advance) distributors vary a lot in the amount of total advance they make (they are built rather cheaply). For this reason they MUST be set at 3000+ rpm using a timing light. Maximum advance is much more important than idle advance, and for the aircooled VW engine and 009 distributor, the maximum advance MUST be between 28 and 32 degrees.
The 009 is usually set at 3000+ rpm because they produce their maximum advance at 2600-2700 rpm, and using 3000 rpm ensures that it's all in.
To do this, make a clearly-distinguishable mark (e.g., white, paint, etc.) on the rim of the crankshift pulley at 30 degrees BTDC
(46.5mm to the right of TDC). I would start by statically setting your timing to about 5 degrees BTDC. Then run the RPMS up until the distributor stops advancing, all the while following the advance with a strobe light. You should get a total advance of about 26 degrees or more.Note: If the 009 distributor is set with more than 32 degree maximum advance, the engine is over-advanced in certain throttle/rpm conditions, and this can cause the engine to ping/detonate. If it's set with less than 28 degrees total advance, the engine will be under-advanced at high rpm and cause overheating. Overheating certainly puts an extra load on the head and it's components, especially the already very hot exhaust valves.
Once the maximum advance has been set, you can then measure the STATIC (engine off) timing and use THAT setting for THAT distributor in future. The static timing using this method is commonly between about 5 and 10BTDC but I have seen reports of up to 16BTDC, since these distributors vary so much in the total advance they can make.
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