Additionally, the 009 centrifugal advance distributor does sometimes cause an acceleration flat spot, as it does not have the vacuum advance adjustment of the original distributor. The 009 distributor can't "load sense" like the vacuum distributors, so it must be limited to "worst case" of a little either side of 28-32 degrees. It is important that you determine the proper parameters for YOUR distributor. So 7.5 BTDC MIGHT be right for some 009s - but for a 009 that has a maximum advance of say 26 degrees, the idle (or static) advance should be set at around 10-12 BTDC so that the maximum advance is in the 28-32 degree range. 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. 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. Overheating certainly puts an extra load on the head and it's components, especially the already very hot exhaust valves. ![]() If it's set with less than 28 degrees total advance, the engine will be under-advanced at high rpm and cause overheating. 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. You should get a total advance of about 26 degrees or more. Then run the RPMS up until the distributor stops advancing, all the while following the advance with a strobe light. I would start by statically setting your timing to about 5 degrees BTDC. 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). 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. 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. For this reason they MUST be set at 3000+ rpm using a timing light. This article contains miscellaneous tune-up information, roughly divided into the following subtopics -Ġ09 (centrifugal advance) distributors vary a lot in the amount of total advance they make (they are built rather cheaply).
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