[CWPASADENA]

The FS Distributor has a very poor curve and too much total advance.


These distributors are designed to be timed at TDC which is the way a stock model A Distributor is timed. This results in very slow timing at idle and thru most of the RPM range below about 1600.


The "B" Distributor has a MUCH better curve and are designed to be timed at 17 deg before TDC. The "B" engine uses a front cover with the timing pin location in a different position than the "A" front cover. This allows for timing the "B" Distributor at 17 deg BTDC.


You can rework an FS to give you less total advance and a better slope to the curve but you have to be able to set the timing with a timing light.


If you are using a 6.0 CR head, do not set the full advance much more than 26-28 deg at 2000 RPM.


My experience and my opinion,


Chris W.
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