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The other day I repaired the fuel pump lobe on the cam for a 262 6 cylinder Ford. It was worn badly but there was enough there to make a master, weld and then regrind the lobe. Today the customer came by to pick up some of the parts that I had cleaned for him, oil pan, valve cover, tappet cover and other stuff. He was telling me how he always thought the engine was a 223 and when he had bought parts for it that's what he bought including one time when he changed the fuel pump. This got me thinking.....
On the 262 the cam rotation is the opposite of a 223 because of the gear to gear drive setup. Does this mean that the fuel pump arm is supposed to be made differently to work with the lobe rotating the other way? This is a 1964 engine.
Next I'm going to regrind the lobes to freshen it up and to give it a very mild "performance" grind.
Just for the heck of it this evening I plotted the now repaired fuel pump lobe and it looks asymmetrical so that means that it would tend to be directional for whatever reason. This has me really wondering if the arm is made differently between the 215, 223 and the 262 fuel pumps.
A customer of mine who does a lot of old car stuff did some checking and he found out from one of his suppliers that the 223 and the 262 did use fuel pumps that were different. The 223 used a Carter M3553S or an AC 4874 and the 262 used a Carter M3838S or an AC 1055. How they are different they didn't know. Does anyone have some pictures?
Can you look up what each motor uses for a fuel pump gasket to see if the bolt pattern is the same?
If so then I would think it has to be in the pump arms or where the inlets / outlets are placed on the pump body.
Dave ----
I'm pretty sure that the gaskets/mounting flanges must be the same because the customer told me that he had changed the fuel pump and when he did he bought one for a 223. It bolted right up. But the fuel pump lobe was damaged when he tore down the engine. How long it ran and weather or not it caused the problem I'm not sure. I'm just wondering about the arms and if they go in different directions because the cam rotates the opposite direction.
Would it make a difference that the cam turns different directions as the arm is just riding on the cam?
Now if the stroke was different between them then I can see that as a problem.
Dave ----
Would it make a difference that the cam turns different directions as the arm is just riding on the cam?
Now if the stroke was different between them then I can see that as a problem.
Dave ----
I'm not sure. This cam has a fuel pump lobe that's an actual cam lobe not a round circle that's offset. It isn't totally symmetrical either so that's what has me wondering if the direction of rotation makes a difference.
