it would backfirer or bearly run
if the timing is off by 9 degrees at the timing belt, your in trouble... you would have bent all your valves..... if its off on the timing tabs then you need a timing light and turn the distributer until you get the desired timing..
Depends on what year 350. It can be 2 degrees BTDC or 4 degrees BTDC. I would try 4 degrees and see how it runs.
its 2% JK Why would iknow sryyy
Change it every 50k miles if not your car is a ticking timb bomb with a very short fuse if it fails it could bend valves or even cause your engine to seize
If it is running at the time it back fires your timing is off about 22 degrees. if it happnes when you are trying to start it then you timing is off 180 degrees.... Your intake valve is open when the spark plug fires.
because its old
Sticking valve?
The make would help. Some used a timing chain and others used gear to gear. The distributor could be worn also.
I would set it at 10 BTDC with the distributor vaccum unhooked while setting timing. 10 to 13 degrees is what the factory recomends.
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It wouldn't have to, but you might be able to add a couple degrees.
I have seen specs as high as 13 degrees but that seems a bit high to me. I would settle for something around eight degrees. That way you will be reasonably safe no matter what the other conditions are. This would be setting at an idle around 650 rpm. Its a good idea to rev the engine with the timing light attached and observe maximum advance it will likely go as high as 34 degrees total from about 2600 rpm to about 3400 max. You should never exceed a total timing of more than 38 degrees.