Fords 6.7 Scorpion Diesel motor

NinerBikes wrote:

blt2ski wrote:

W4RLR wrote:

NinerBikes wrote:


Ford's track record with building diesels... 3 attempts now, since Navistar got smart and dumped Ford. 6.0, 6.4, now 6.7. Nothing has changed, when it comes to their engineers designing diesel engines.

Cummins track record? Duramax track record? You tell me.

Ford 6.0 Powerstroke is a Navistar VT 365
Ford 6.4 Powerstroke is a Navistar Maxxforce 7.

The Ford 6.7 Scorpion was designed and built by Ford. All previous engines were built by Navistar, including the 7.3.

Ford has tweaked ALL of the diesels since they have used them from Navistar. The only one maybe not tweaked, and even then I would not bet on it is the IDI6.9. The IDI7.3 max HP/torque from navistar is 175/335, I have one, pretty gutless overall in a 26K navistar MDT. For tweaked it to 185/385 to keep up with the 6.5td specs. The turbo idi7.3 was also a tweaked motor, as that motor was never designed to have a turbo on it, as was the idi6.9. BUT a lot of folks put one on it, including Ford for a year. With a few overheat issues if you had the auto and AC option. You got one or the other, or similar overheat issues the GM had with the 6.5td.

The T444e/7.3psd was maxed at 235/620 from navistar and ~2800 rpm. Ford took it to 275 and the upper 500 lb range with 3500 rpm.

Do not recall what all Ford did to the 6.0 ad 6.4, but I am pretty sure the let them also go beyond the 2800 navistar limited them to to get into the 300+ hp range. The 6.0 was an intermediate motor tween the 7.3 and 6.4, never to be put into production for long.

Marty

I had an 88 F-250 Custom with the 7.3 IDI... and as I recall, it was a California model, and was not even 175 HP, something like 170 or 168HP, if I recall correctly, to make CARB happy. 260k miles on it when I sold it with 5speed overdrive manual for $5000 in 2001. Delvac 1300 always 15w-40... 21 to 22 mpg empty on highway at 60-65 mph, lots of times to Mammoth Lakes and back to L.A.

Could very well have been that low. The 5.9 had a 160/380-400 spec IIRC when it first came out. With the IDI 7.3, there were three HP specs, IIRC 135, 155 and 175. Mostly put in bus's doing local school routes. Did not need a lot of HP to move loads to 26K, with speeds to 35-45 mph typical. A diesel with gas power specs when Navistar got out of building gas engines. Price a bit more than gas, but not enough to scare folks. IIRC it was a $2K option for my rig. The DT360 equal to a B5.9 would have been over 6K for a 185/500 or so torque rig. I have 135K on a 92, not sure a 500K mile motor is any better at $6k extra vs a 100K mile motor for a general mileage stat before rebuild with my 7.3. Still runs, but it is tired.

Are you sure you had a 7.3 in 88? or was that one of the first years? thought it was a 6.9 about then......but memory could be screwing with me too!

Marty