MSD dizzy
MSD dizzy
Post Fiend
Joined: Sep 2006
Posts: 14,325
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From: Island Southeast Alaska
All self contained. at least the one on my marine Windsor is. Don't have the module number handy but it is at least 6 years old. Keeps popping the control module every few months. MSD said that was common on that model and would me glade to sell me a better/more expensive one. Or just keep a spare module around at about a 100 bucks a pop. Think I will see what Nappa wants for a point type dizzy If they have them for the Windsor.
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Joined: Apr 2005
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From: UTI student
there are two types from MSD for each engine family. One type is ready to run meaning it connects to the factory wiring through connectors or splicing. The other is for use with an MSD box like the 6a, 6al or 7 series. Make sure to ask when you call. I believe the ready to run model is more then the one for the MSD boxes. I ran the pro-billet with mechanical advance only and a MSD 6AL box with blaster 2 coil. I never had any problems once I put the correct springs in it.
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Joined: Apr 2005
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From: UTI student
I would love to pass that info to the new owner but since the salvage yard bought my truck I don't think they would care. Maybe the lack of vacuum advane was the reason I was having trouble with timing at first.
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Joined: Sep 2001
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Probably, getting a vehicle drivable on the street without vacuum advance is difficult and it will not be efficient. A real gas hog. Most engines spend the majority of their time at part throttle where you need additional advance to burn the rare low pressure mix created at high vacuum. With only mechanical advance if you tune for part throttle it will ping like crazy if you get on it. If you tune for full throttle it drives like a pig at part throttle.
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From: UTI student
And here I thought the poor gas milage was due to the Edelbrock RPM heads and intake and holley 750 carb. Guess I learned from my mistake again.
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Distributor
Originally Posted by factory594x4
Can I just drop in an msd dizzy? Will it match the stock harness? Do I need a spark box?
http://www.performancedistributors.com/forddui.htm
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Posting Legend
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Originally Posted by hatemakings/n
And here I thought the poor gas milage was due to the Edelbrock RPM heads and intake and holley 750 carb. Guess I learned from my mistake again.
Sounds like you built a race engine and put it into a truck.
Post Fiend
Joined: Sep 2006
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From: Island Southeast Alaska
Originally Posted by Torque1st
You need vacuum advance on a street motor. Mechanical advance only distributors should only be used for full throttle racing applications.
Or a Marine engine that is at idle for trolling or 3/4 throttle to get to the next fishing hole or out run a storm front.
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Well we don't really cover marine apps here on this truck forum.
But any engine that is not run WOT most of the time needs additional timing controls.
There are many factors that influence ignition timing. In the old trucks we address two of them: Advance required due to engine speed is regulated by the centrifugal or mechanical advance system. Advance needed for engine load is regulated by the vacuum advance mechanism. The old "dumb" non computerized systems can't regulate advance well for mixture but it is partially compensated for with the load and RPM systems but only roughly. The "dumb" systems can't compensate for engine and air temperature at all. There are other factors like gearing and of course octane. We just have to hope we are not too far off.
But any engine that is not run WOT most of the time needs additional timing controls.There are many factors that influence ignition timing. In the old trucks we address two of them: Advance required due to engine speed is regulated by the centrifugal or mechanical advance system. Advance needed for engine load is regulated by the vacuum advance mechanism. The old "dumb" non computerized systems can't regulate advance well for mixture but it is partially compensated for with the load and RPM systems but only roughly. The "dumb" systems can't compensate for engine and air temperature at all. There are other factors like gearing and of course octane. We just have to hope we are not too far off.
Post Fiend
Joined: Sep 2006
Posts: 14,325
Likes: 14
From: Island Southeast Alaska
Originally Posted by Torque1st
Well we don't really cover marine apps here on this truck forum. But any engine that is not run WOT most of the time needs additional timing controls.
There are many factors that influence ignition timing. In the old trucks we address two of them: Advance required due to engine speed is regulated by the centrifugal or mechanical advance system. Advance needed for engine load is regulated by the vacuum advance mechanism. The old "dumb" non computerized systems can't regulate advance well for mixture but it is partially compensated for with the load and RPM systems but only roughly. The "dumb" systems can't compensate for engine and air temperature at all. There are other factors like gearing and of course octane. We just have to hope we are not too far off.
But any engine that is not run WOT most of the time needs additional timing controls.There are many factors that influence ignition timing. In the old trucks we address two of them: Advance required due to engine speed is regulated by the centrifugal or mechanical advance system. Advance needed for engine load is regulated by the vacuum advance mechanism. The old "dumb" non computerized systems can't regulate advance well for mixture but it is partially compensated for with the load and RPM systems but only roughly. The "dumb" systems can't compensate for engine and air temperature at all. There are other factors like gearing and of course octane. We just have to hope we are not too far off.
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