15-08-2020, 08:30 AM
(This post was last modified: 15-08-2020, 09:17 AM by John Barker.)
The cylinder firing order of 1,3,4,2 will be determined by the cam shaft which controls the opening and closing of the valves. On the compression stroke the valves will be closed in order for the spark plug to be timed for the ignition of the fuel.
To change the firing order will involve a different cam shaft setting for the valves to be in synchronizing for the compression/firing stroke.
There are different settings given for the amount of advance on the Austin 7 engine. "Bill" Williams book gives the setting of one and seven eighths of an inch, and The Austin 7 Companion a setting of one and a quarter inches.
I have set our Austin 7 with manual advance / retard to one and a half inches, although this has a Phoenix one and a half inch crank. The advance setting may have something to do with the back firing. I am unsure if the mixture setting on the carburettor would cause this.
To change the firing order will involve a different cam shaft setting for the valves to be in synchronizing for the compression/firing stroke.
There are different settings given for the amount of advance on the Austin 7 engine. "Bill" Williams book gives the setting of one and seven eighths of an inch, and The Austin 7 Companion a setting of one and a quarter inches.
I have set our Austin 7 with manual advance / retard to one and a half inches, although this has a Phoenix one and a half inch crank. The advance setting may have something to do with the back firing. I am unsure if the mixture setting on the carburettor would cause this.