7.8 diesel engine
Fleet Mechanic
Joined: Jul 2004
Posts: 1,515
Likes: 198
No, don't bother. Cab is different, front frame crossmember is different, bell housing bolt patterns are different, not to mention fuel system and electrical. The 7.8L was a Brazillian built boat anchor anyway, and they are getting hard to find parts for.
Fleet Mechanic
Joined: Jul 2004
Posts: 1,515
Likes: 198
I had a couple. Distinct nautical flavor, that's for sure! Actually I had pretty good luck with mine from a dependability standpoint, but the 6.6L and 7.8L are very large and heavy for the amount of power they make. In 1993 Ford dropped the 6.6L and 7.8L, replaced them with Cummins B and C series diesels. Still have a 1994 F-700 with a 230 h.p. Cummins B5.9, and it outran the 1991 7.8L we had with ease. 8.2L Detroit? Had them too! Probably the single most economical medium duty truck we ever owned was a 1985 GMC 6000 that had a 165 h.p. naturally aspirated 8.2L. Never broke, used very little fuel. Did I mention that it was slow? Now, any of the higher h.p. turbo 8.2L's like the 225 h.p. were trouble. Couldn't keep head gaskets in them. Take one apart and you can see why. Anyway, like the post says, you are a lot better off finding a Ford built with a 7.8L than you are trying to install one in a truck that didn't, particularly a gas job.
Cargo Master
Joined: Feb 2003
Posts: 2,341
Likes: 5
From: Sacramento
Here's a 7.8 in an 87 F700. I did the fuel screw, 3 clicks tighter on the gov springs, and strait pipe. Advancing the timing should have been done, but I never got around to it. It had 2 names that the guys called it; little rocket, or old smokey(when I took out the fuel screw for a while).
YouTube - Ford 7.8 straight piped F700
YouTube - Ford 7.8 straight piped F700
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piperig78
1994.5 - 1997 7.3L Power Stroke Diesel
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Nov 11, 2006 11:07 AM
