1984 6.9 - Ford Powerstroke Diesel Forum
6.9L IDI Diesels Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

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  #1  
Old 11-06-2009, 10:26 AM
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1984 6.9

About to pick up a 1984 F250 4x4 4 speed 6.9 diesel. Just wondering what I can do as far as mods go. I know I can do a turbo but thats a little expensive right now.
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Old 11-06-2009, 12:56 PM
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For cheap mods....hypermax exhaust + a little fab to get it to work (3.5" exhaust). Open up the intake somehow. Instal a pyro, and turn the pump up a little bit. Should be roughly $500-600 for everything mentioned above. You should be making a good 190 hp at the crank.

You can find used turbo's. It seems like recently a lot of people are selling them as they need the money, so they can be had failry cheap. Heck I saw somebody on another site post a craigslist add with a 7.3IDI engine with the turbo on it, for $450. Just gotta look.
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Old 11-08-2009, 10:26 PM
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im just taggin along with your post. i just bought an 84 6.9idi 2wd dually 2 days ago. As soon as i got it home I straight piped it with a 3in exiting before the rear wheels. Sounds good. Financially, i dont think i will be installing a turbo anytime soon. I plan on puttin a k&n in and runnin a tube off the air box out to the grille. Of course turn up the fuel and get some coal burnin but I am looking for some advice as to how i can make some good power and keep it reliable. This is an AT so i am wondering if i should consider a tranny flush.
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Old 11-13-2009, 04:57 PM
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Can you do Nitrous on the NA diesels?
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Old 11-14-2009, 08:10 PM
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Nitrous....kinda iffy.

I've only ever heard of one guy using it. He said if he engaged it at to low of an RPM the motor would actually cut out. I wouldnt try it. Propane is probably the most I would go.
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Old 12-04-2009, 05:00 PM
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hey guys did the 84 6.9 have a 4 speed manual as an option?
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Old 12-04-2009, 05:24 PM
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Quote:
Originally Posted by 97powerstroker View Post
hey guys did the 84 6.9 have a 4 speed manual as an option?
thats what my 83 has and i think it was availible for at least a few years. irs a borg warner too btw
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Old 12-04-2009, 05:54 PM
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No you could either get a auto (C6) or manual (BW T-19). Both are non overdrive trannies.
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Old 12-05-2009, 12:38 PM
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Quote:
Originally Posted by FordGuy100 View Post
No you could either get a auto (C6) or manual (BW T-19). Both are non overdrive trannies.
im lost .... the borg is not a 4 speed? i didnt catch the od question. inform me please.
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Old 12-05-2009, 12:48 PM
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The Borg Warner (BW) is a 4 speed. Its called a T-19 4-speed. The C6 is a 3 speed automatic tranny. Both do not have overdrive.
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