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Old 06-29-2004, 10:02 AM
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Setting timing on Ford 460

Can you adjust the timing at all on a '78 Ford 460? This is a stock ign. module/coil/distributer set up. According to the Ford manual all you can do is "check" the initial timing and if it is not correct - buy a new ign. module. The manual says there is no adjustment via distributer rotation. Is this accurate or is there some adjustment one can make at the distributer? The reason I ask is my timing at idle was 2 degrees BTDC and the manual says it should be 8. I put in a new module and it also read 2 degrees rather than 8. So my thought was that the distributer may not have been set exactly right when the engine was rebuilt. But if the timing can not be adjusted at the distributor - then that theory goes out the window.

The engine idles great and cruises fine - but I have a slight bog when going to WOT from a dead stop which I can't seem to eliminate via idle mix adjustments, jet changes, and rod changes (it's an e-brock 1407). So timing is next on my list.

Dewey

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Old 06-29-2004, 08:42 PM
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Question

Is the engine car or light truck? Is it still in the origional chassis?

It sounds like you have a EEC-I or EEC-II system. Is the distributor bowl empty other than the rotor?
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Old 06-30-2004, 12:00 AM
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'78 460 should be a duraspark system. Dist will have 3 wires coming out of it and there should be a 5 or 6 wire module mounted on the left inner fender. I think the only Ford that had a EEC I system in 78 was the Versailles. 79 was EEC II. The dist should be fully adjustable unless you have some goofy conglomeration of components on that vehicle.
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Old 06-30-2004, 12:16 AM
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Bog....

[color=lightblue]Doc here:

Take a look at this thread, It might give you some ideas about timing on a 460..

http://www.rv-coach.com/current_cate...read_full.html

Hope that helps!

Doc
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Old 06-30-2004, 06:37 AM
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Kultulz,

Engine is from a light truck but has been transplanted into my '32. It is the Dura Spark II system. The distributer contains the rotor (tall), armature, and stator assembly.

2manytoyz,

Yup, Dura Spark II system. Three wires from distributor. The ignition module has the "blue" code color and is now mounted on the firewall - but otherwise uses the stock wiring and harness. According to my handy-dandy Chilton Manual, "With the Dura Spark II System, only an initial timing adjustment is possible. Ignition timing is not considered to be a part of tune-up or routine maintenance." Then, under the section regarding the initial timing it says, "If the marks are not in alignment (meaning the initial timing is not set correctly), replace the ignition module." There is nowhere in the manual that suggests or describes adjustment of the timing via distributor rotation. I suppose it is possible that Chilton is wrong (or incomplete) - maybe somebody on the board has the actual Ford Manual for that system and could look it up - or has experience actually doing it. The ignition system is not a "conglomeration" - so I should be able to just go by the book.

The other alternative is that I just start fiddling with the distributor and see what happens - but didn't want to do that until I was fairly certain I wasn't creating even worse problems.
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Old 06-30-2004, 07:47 AM
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Arrow

DURASPARK II adjusts as does a points distributor. Remove the vacuum signal hose and set your intial timing. Throw the CHILTONS away...
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Old 06-30-2004, 09:28 AM
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I've found a lot of mistakes and deleted information in the aftermarket manuals. Its always best to use a manufacturer specific manual where possible. They are just putting out a generic manual and trying to cover too many years of cars.
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Old 06-30-2004, 11:30 AM
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Quote:
Originally posted by KULTULZ
DURASPARK II adjusts as does a points distributor. Remove the vacuum signal hose and set your intial timing. Throw the CHILTONS away...
Thanks "tulz" and "toyz". I'll give it a go.
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