Ford 390 FE help

[Robbie Welch]

I need a little help with a 390 I'm working on. It had trouble running with less then 50deg total timing so I put a Deg wheel on it with a piston stop and sure enough it was 8 deg wrong. While I was there I pulled the timing chain cover to make sure the cam was installed correctly and it was but it had a stardard timing chain on it. Now I'm installing a roller chain, my problem is the cam dowel was sticking out of the fuel Pp eccentric about .250 which looked wrong and when I took the cam gear off the dowel came out with it. My problem is it appears that another pin may be at the bottom of the dowel hole (which is only .325 deep). My question is can the cam dowel pin be pushed back through the front of the cam on FE engines. Sorry for being so long. Thanks for your help Robbie

[Rory McNeil]

Ford used 2 different fuel pump eccentrics on the 63 1/2 and newer FEs, the older engines used a thick 1 piece eccentric, which used a long dowel pin in the cam. The pin should stick close to flush in the eccentric, the cam bolt washer holds it in place. Later FEs (not sure exactly when), used a 2 piece eccentric, with one thin inner piece, with a slightly larger outer ring that slips over the inner. (I am guessing it was a friction reducing modification). With the 2 piece eccentric, a shorter dowel pin is used, as the inner eccentric has a small tab that fits into the dowel hole of the cam gear, so the pin needs to be short enough to allow this tab to fit inside the hole, and allow the inner eccentric to sit flush against the cam gear. `The cam dowel hole in the camshaft does not go all the way thru, so if there is something jammed in there, you wont be able to push it farther in, assuming it is bottomed out. I suppose you could shorten the pin you have, but i would be concerned if .325 is a safe enough depth for the pin to fit inside the cam.
Also, if the old timing set was origional, the backside of the cam gear is flat, with the thick C shaped washer that is a spacer, that fits inside the cam retainer thrust plate. Every aftermarket cam gear I have ever seen has a built in step on the backside, so DO NOT reinstall the C washer. To do so would cause the cam gear to not be parallel with the crank gear.
As for your timing marks being off, are you using an ATI Damper. I have had a couple of these that were off by 7 or 8 degrees with the OE timing pointer. If it is a OE Ford balancer, there is a possibility that the outer ring has slipped on the hub. do you have another balancer you can compare with.

[Robbie Welch]

Rory thanks for ther reply. The balancer is stock and in ok shape the dowel was my concern. I didn't know if it went thru the cam or not on a FE. It looks like I'll be replacing the cam, would you reuse the lifter? Thanks again Robbie

[pmrphil]

If you're changing the cam you HAVE to use new lifters, have you checked into having the old cam redrilled and install the dowel 180 deg. off? It's common practice to double dowel Ford cams when there is high spring pressures, so you should be able to re-use the cam you have now, just don't forget to keep the lifters in order.

[Robbie Welch]

Thanks for the reply Phil. Some of the mystery has been solved. The cam dowel hole had a cut off bolt in it to make the dowel long enough to contact the eccentric (it wasn't out of the eccentric .250 like I thought). I did keep the lifters in order but I thank I'm going to put a hydraulic cam in it (its a street car). Thanks Rory and Phil for the help

[Dinsdale]

I'm not a big fan of Hydro cams but they do make some good hydro rollers nowaways. I'd suggest contacting this guy for some help in choosing what you need. He's also got a great book out.

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