There is a previous thread, If you use the key word search "Distributor timing curve" above in the search block, there is more info, but no curve chart as per say.
The topic "Distributor timing curve" was from a customer that was looking for the information for me when I was rebuilding his distributor back in 2009.
For those that do not know, the timing curve information is on the bottom of the page called STANDARD AUTO-ELECTRICIAN'S MANUAL under IGNITION and it is listed as Automatic Advance, aka Timing Curve.
The degrees of advance are noted in both flywheel and distributor RPM.
I have the information for the IGB 4001B, IGB 4007, & IGB 4008 if anyone needs it.
Do you have the information on Autolite IGB-4001a. I would like to check mine & rebuild if needed. Not sue how much it is supposed to advance. Can I check it and or adjust it on a bench??
Larry
I just purchased a booklet printed in 1949 listing distributor specs for auto-lite and delco-remy
dist. # IGB-4001a
rotation right
cam angle 46
engine rpm distributor degree
800 rpm 0.0
1200 rpm 1.0
3400 rpm 11.8
Information from the Allen Electric and Equipment company
Hope this helps
Will
Where Are You From? Guelph, Ontario, Canada
Do You own a car built by Durant? 1932 Frontenac built by Dominion Motors, Leaside