Aldon Igniter ignition, no vacuum advance ?

[christopher storey]

The standard curve ( vacuum disconnected ) for a 3.8 was ( crankshaft speed and degrees )

no advance before 650 rpm

900 0 to 5 degs

1300 7 to 13

1700 14 to 18

2600 18 to 22

3000 20 to 24

To all these have to be added the static timing which was 9degs BTDC for an 8:1 car and 10 degs BTDC for a 9:1 car , and thus the absolute maximum mechanical advance should be 34 degs

[KingRichard]

Hi,

I made curves for 3.8 and 4.2 ignition for my 123/TUNE ignition recently. The curves are bases upon data from factory manuals.

Here are links:

http://www.richardbrand.nl/images/83.jpg
http://www.richardbrand.nl/images/83.jpg

Because of the way 123/TUNE works the 10 degrees static timing is already in the curve added. So static timing is 0 degrees.

Regards,
Richard van den Brand

[KingRichard]

The other link is:

http://www.richardbrand.nl/images/84.jpg