I wanted to start a new thread more related to this technical question.
I recently came across an Alfa romeo manual with instructions of how to modify and adjust the advance curve of a Bosch distributor.
After removing several parts, (interrupter,stator plate, circlips etc) you have access to the centrifugal weight and springs.
After removing the 2 springs, you set up a protractor attached to the distributor housing so it's in line with the shaft.
Then with a pointer on the rotor arm(simple wire) pointing to 0 degrees while its at its furthest CCW position, you carefully move the weight outwards until it hits the stop peg.
Take a reading on the protractor where the pointer is.
Mine measured about 16.5 degrees!! So crank advance is ~32 + static(8) = 40 degrees.
MAX advance for this engine should be 36 degrees!!!
Has anyone had experience of measuring the max advance using this method?
If this is a valid and accurate method my distributor needs a serious adjustment to reduce the max advance.
The Alfa Romeo Dohc Engine High-Performance Manual - Jim Kartalamakis - Google Books
Any opinions would be appreciated.