55 with a 302 engine/ Timing question.

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poolplayer1

Senior Member
I was checking the timing on my 302 engine yesterday and noticed that I have the timing at 10 degrees before top dead center. This is a complete rebuilt engine. I have heard of guys setting the time at TDC on an engine like this so I thought i would ask you guys what the timing should be set at.
Should I set it to tdc or just leave it at 10 btdc? Thank you for your help.
 
The timing may be just fine where it is, especially if it's been running without noticeable problems.

Assuming it has the original distributor & ignition system, look up the tune-up specs for the year of the engine and follow them.

Knowing the year of the engine and any performance parts changes beyond stock will be helpful.
 
My old Ford Motorcraft specs manual says 6 degrees BTDC for all 302's from '68 through '72. I don't have any specs beyond that year. I'm sure 10 degrees is just fine unless you get spark knock under load.


Sal
 
It is important to check total advance as well as initial. IIRC, total mechanical and initial should be 36-38 degrees. When the vacuum is connected it can be around 50 degrees. I ran a 302 on regular gas for many years with good mileage in a '40 coupe. Before ethanol I would always get 19-20 on the road running 70 or above.
 
Thanks to all for your response. The engine is a 1968. I might try to change to 6 degrees to see if there is any difference in performance.It is running ok at 10 but will try 6 just for the heck of it. I am also going to check the total timing to see where its at.
 
If it runs good at 10 degrees, 6 degrees won't be any better and maybe even a very slight drop in fuel economy.


Sal
 
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