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12-01-2019, 01:24 PM | #1 |
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Join Date: Sep 2015
Posts: 399
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55 with a 302 engine/ Timing question.
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. |
12-01-2019, 04:29 PM | #2 |
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Join Date: Aug 2012
Location: Abq, NM
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Re: 55 with a 302 engine/ Timing question.
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. |
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12-01-2019, 04:51 PM | #3 |
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Join Date: Jun 2010
Location: Detroit suburb, MI
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Re: 55 with a 302 engine/ Timing question.
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 |
12-01-2019, 06:28 PM | #4 |
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Location: Star, MS
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Re: 55 with a 302 engine/ Timing question.
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.
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12-02-2019, 11:44 AM | #5 |
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Join Date: Sep 2015
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Re: 55 with a 302 engine/ Timing question.
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.
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12-02-2019, 01:15 PM | #6 |
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Join Date: Jun 2010
Location: Detroit suburb, MI
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Re: 55 with a 302 engine/ Timing question.
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Sal |
12-04-2019, 08:38 PM | #7 |
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Join Date: Mar 2016
Location: LaGrande Oregon
Posts: 866
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Re: 55 with a 302 engine/ Timing question.
My 302 is a stock 1971 and I believe it is set at 10 degrees. It runs strong with no overheating or pinging issues.
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