I'm rebuilding a 66 289 and my new timing chain is double wide and my old one is single. Now when I went to put the timing cover on the eccentric is too far out. I took off the eccentric and the cover fits fine. So does anyone know if I can get a thinner eccentric? Or am I going to have to get a block off plate and run an electric fuel pump? Or am I going to have to buy the original size timing chain? What is my best bet?
Thanx

 

There is supposed to be a "two piece" excentric available, I could not find one, so I will be using an electric pump....

Sucks.....

I got the same surprise you got....

 

Except for the annoying noise, an electric fuel pump is superior to a mechanical one anyway. It cuts down on the possibility of the mechanical pump vapor locking, and they are just more efficient.

 

Do you think the original one could be shaved? I looked into the fuel pump hole and there should still be enough room as long as the pump arm isn't too far towards the chain. Any suggestions on pumps, mounting locations etc? I do know one of the 351s uses the same eccentric, but the other is different. I wonder if it's thinner? Mustangs Unlimited didn't stock it so I couldn't check it. Not happy with this

 

Any suggestions on brand, pump pressure requirements, mounting locations etc? How could I tie in power to it? I know I'll need a relay, but not sure how to wire it. I would want it to shut off if the motor shuts off. How could I only have power to it when the engine is running/starting?
thanx

 

My experience has been the exact opposite. They fail a lot. Everybody that I know that switched from a mechanical to a electric had problems with it.
That and I prefer that the pressure increases as the rpms go up rather than a constant set pressure.
-P.
PS: Vapor lock is usually caused by boiling fuel. Mechanical pumps have nothing to do with it.

 

Not true. Vapor lock can be caused by any fuel related part attached to the hot engine. That includes the mechanical fuel pump and the lines and the carburetor. Hmmm. I wonder how many new cars are running with electrical fuel pumps?

 

P- Do you have another suggestion for me? I'd rather not do the electric pump, but what are my options? Do you know if I can get away with shaving my eccentric? Is your timing chain single or double stran? If double, how did you get your cover on?
I'm not racing it so I think the constant pressure will suffice.

 

As to your previous post, yea, I think that the excentric could be cut down, but, the dowell pin on the end of the cam is going to be too short to engage the eccentric. The cam I bought had a longer replacement pin in the box, but it was hell getting the short pin out. After spending many hours getting the pin out, I discovered that the timing cover would not fit anyway,,, [:@]

Save yourself the aggrivation, go with an electric pump. Get a holley pump with a pressure regulator. Summit has their own brand that looks the same, but it is not the same. The summit pump we put on my sons truck lasted about 3 months. The holley has been in place for over a year without issue.

If using the Mustangs stock wiring, a relay is advisable, you will just need to provide thesignal to the relay from the ignition side of the ignition switch.

Ron Francis wiring has these relays available, as well as an inertial safety switch in case of an accident.

 

Here is that info you were asking for.
http://www.jegs.com/webapp/wcs/store...61038_-1_10307