I will revive this. I am looking at the 7.3 into my 5 ton. Yeah people say the 6.9 and 7.3 IDIs are turds. Yeah you wont win any pulling contest or yank a tree down, I will however tell you that the IDI will get you there everything pulling whatever you want at its own pace. My truck has over 600k on a NON rebuilt engine and I have grossed 40-45k with my 6.9 NA and she will do it day in and day out with 4.56 gears getting 12mpg loaded and empty . Parts are alot cheaper and easier to come by than the powerstroke. Granted the DI is nice, but you will melt that powerstroke with the non intercooled 94.5 - 97 model engine. the powerstroke is computerized so you have to factor in computers and what not and the other things that can go wrong.
The DB2 pump is by far impressive for what you pay for it. The 6.2 shares the same pump. Swap the 6.2 gov spring into your ford DB2 and your in buisness for 3600rpms. The uhaul version of the 6.9 and 7.3 is the best due to it has the air compressor system built in for the air ride if it has it. Uhaul engines are governed to 2800rpms though. IDI performance parts are limited but I have seem them put down numbers of 600hp and 800ft lbs for $2000 in motor work.
Things to do:
Moose Pump - check with agnem on Oilburners. It by FAR opens the DB2 pump up. WIll run you $400 - $600 depending on how worn out your pump is and what needs to be replaced.
Head Studs $245 from Summit ONLY AVAILABLE for 6.9. The 7.3 studs are $900.
Fire ring head gasket $60 each from DPS
BB code injectors for $30 each or Moose misters also check with agnem he has the video. They are costly @ $900 a set but well worth it.
Add a turbo, wastegated ATS with an aurora 3000 will run you 500$. Shorten your wastegate rod and get a pyrometer.
Intercooler it. you got tons of room under the hood get some pipes and make your own kit ( i did on my F250 turbo IDI for less than $300.
Camshaft - 12% increase in torque and torque at 200 less rpms.Check with typ4 on oilburners. He makes a MEAN torque camshaft for the IDI he grinds as they are ordered $400.
4" + exhaust straight piped $250
Clean the heads up, they tend to have alot of slag in the valve ports.
The 85-87 6.9 engine is better than the 7.3 due to the thicker cylinder walls.
PLEASE do not put the ZF5 behind the IDI, you will regret it with the dual mass flywheel. You spend the $600 for the solid flywheel conversion and you will like it better. 6.9s are SAE 2 bellhousings so you can hook it to ALOT of things. Find a S1600 schoolbus with a 5spd 4054 spicer and ull be set. I have seen the engine and tranny combos from $300-$500.
I attached a link to the dyno graphs for the differences in mods I talked about earlier. Also the bottom link is for the moose mister video, THEY ARE VERY IMPRESSIVE. You can hear the high pop pressure. If it says the video doesn't exist just click on the play button on the black screen.
Dyno graphs: Moose pump & Moose injectors. - Oilburners.net
[media]http://s218.photobucket.com/albums/cc123/SD70M/2004-10-26/Videos%201/?action=view¤t=moosemister.mp4[/media]
The DB2 pump is by far impressive for what you pay for it. The 6.2 shares the same pump. Swap the 6.2 gov spring into your ford DB2 and your in buisness for 3600rpms. The uhaul version of the 6.9 and 7.3 is the best due to it has the air compressor system built in for the air ride if it has it. Uhaul engines are governed to 2800rpms though. IDI performance parts are limited but I have seem them put down numbers of 600hp and 800ft lbs for $2000 in motor work.
Things to do:
Moose Pump - check with agnem on Oilburners. It by FAR opens the DB2 pump up. WIll run you $400 - $600 depending on how worn out your pump is and what needs to be replaced.
Head Studs $245 from Summit ONLY AVAILABLE for 6.9. The 7.3 studs are $900.
Fire ring head gasket $60 each from DPS
BB code injectors for $30 each or Moose misters also check with agnem he has the video. They are costly @ $900 a set but well worth it.
Add a turbo, wastegated ATS with an aurora 3000 will run you 500$. Shorten your wastegate rod and get a pyrometer.
Intercooler it. you got tons of room under the hood get some pipes and make your own kit ( i did on my F250 turbo IDI for less than $300.
Camshaft - 12% increase in torque and torque at 200 less rpms.Check with typ4 on oilburners. He makes a MEAN torque camshaft for the IDI he grinds as they are ordered $400.
4" + exhaust straight piped $250
Clean the heads up, they tend to have alot of slag in the valve ports.
The 85-87 6.9 engine is better than the 7.3 due to the thicker cylinder walls.
PLEASE do not put the ZF5 behind the IDI, you will regret it with the dual mass flywheel. You spend the $600 for the solid flywheel conversion and you will like it better. 6.9s are SAE 2 bellhousings so you can hook it to ALOT of things. Find a S1600 schoolbus with a 5spd 4054 spicer and ull be set. I have seen the engine and tranny combos from $300-$500.
I attached a link to the dyno graphs for the differences in mods I talked about earlier. Also the bottom link is for the moose mister video, THEY ARE VERY IMPRESSIVE. You can hear the high pop pressure. If it says the video doesn't exist just click on the play button on the black screen.
Dyno graphs: Moose pump & Moose injectors. - Oilburners.net
[media]http://s218.photobucket.com/albums/cc123/SD70M/2004-10-26/Videos%201/?action=view¤t=moosemister.mp4[/media]
Last edited: