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11-25-2010, 10:37 AM | #1 |
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Join Date: Jul 2010
Location: Eau Claire, WI
Posts: 113
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Fuel pump question
Has anyone installed an in-line fuel pump? I just purchased one from one of the major Model-A suppliers. The directions say to connect the ground wire to the negative terminal on the pump. Is this assuming that the vehicle is negative ground? Since I am running positive ground should the ground wire go to the positive terminal? On another note, does anyone use the Ampco top cylinder lubricator. I remember seeing these advertised for use on older cars back in the 70's. What kind of oil is recommended to be used in them? Thanks for the information. This is a great site and I have learned a ton here. Howie
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11-25-2010, 10:39 AM | #2 |
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Join Date: May 2010
Location: new britain,ct 06052
Posts: 9,390
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Re: Fuel pump question
Is your system 6 or 12V ? I would connect to positive terminal if pos ground. Did't a lot of the top oilers use marvel mystery oil?
Paul in CT |
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11-25-2010, 11:36 AM | #3 |
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Re: Fuel pump question
Did you also post this on the HAMB site, more modified car owners there?
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11-25-2010, 11:55 AM | #4 |
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Join Date: May 2010
Location: on the Littlefield
Posts: 6,159
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Re: Fuel pump question
I like the original pump, there has never been a failure.
Have you ever followed a car with a top oiler in a parade?? If you install an electric pump you need to have it wired to stop if the engine stops running --even if the key is still on --for safety and fire prevention reasons. Without knowing what make and type of pump it is hard to say about polarity, I would think that if you have +ground the + wire of the pump should be grounded. An electronic pump will have problems with the wrong polarity, a points type of pump usually doesn't care. |
11-25-2010, 12:12 PM | #5 | |
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Join Date: May 2010
Location: Windy City
Posts: 2,919
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Re: Fuel pump question
Quote:
The Ampco sucks oil based on engine vacuum, the higher the vac, like idle or decelerating, the more oil. Under load, with low vac, little or no oil is delivered! Overall oil feed is controlled by a simple screw valve. The Marvel Inverse Oiler feeds oil inversely to the engine vacuum. Low vacuum (heavy engine load) more oil, high vac, much less feed. The early supercharger guys couldn't live without this thing! Perfect also for trucks and A's, which are subject to lots of lugging and heavy throttle, low vacuum operation. The oil flow is regulated by a calibrated, adjustable inverse regulator, not a simple screw valve. One design of the Marvel "Inverse" oiler. LINK about Marvel Inverse Oilers Note the regulation adjustment on top and the glass sight window to monitor the rate. |
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11-25-2010, 12:20 PM | #6 |
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Join Date: May 2010
Location: new britain,ct 06052
Posts: 9,390
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Re: Fuel pump question
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Paul in CT |
11-25-2010, 12:57 PM | #7 | |
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Join Date: May 2010
Location: Windy City
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Re: Fuel pump question
Quote:
There were carb adapter plates made by Ampco, but their "A" plates did not have a tube into the airflow. A feed that does not have that tube extension will just dribble oil along the side of the manifold in an updraft application. You really want the oil to spray. |
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