need some more hp for the old 7.3 idi! - Diesel Bombers



6.9L & 7.3L Performance Discussion of 83-94 6.9 and 7.3 Liter Ford Diesels Related to Performance and Longevity

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Old 04-25-2012, 10:37 PM
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Question need some more hp for the old 7.3 idi!

I just traded my vw car for a 1990 7.3 idi! From what I've discovered so far mods are hard to come by for this truck. I'm looking for a low budget power boost without turning to a turbo kit just yet. I'm new to diesel so i'm kind of in the dark when it comes to mods. I was thinking maybe intake and exhaust? it has a stock intake on it and the kid who had it put a 6 inch stack on it??? shouldnt it need a little more back pressure? anyways other than the stack it has new oem starter, glow plugs, injectors, fuel pump and thats about it...its only got a 110k on it so I hope to get a lot of life out of it! Let me know what you think!!!!!!!
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Old 04-26-2012, 07:07 AM
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Intake and exhaust won't make any more power, your engine is mechanical so it won't know there is any difference in airflow. Fuel is what controls power.
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Old 04-26-2012, 07:26 AM
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Ok any suggestions? i'm guessing aftermarket injectors and pump then?
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Old 04-26-2012, 09:37 AM
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turn the pump up to flats, and absolutly put an BHAF of some sorts and exhaust on it arround (4 inch when they merge. 2.5 or so at the manifolds). you dont have forced air to cool things down so your engine needs to breathe as much as possible. might look into a small water meth set-up but you wont gain from it like the turbo engines do.
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Old 04-26-2012, 09:50 AM
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Ok thanks! what about taking a turbo off of a first gen(like a 94) and putting it on mine? how much work would that take? I know someone who owns a junk yard and has a few connections so i could probably get get one for cheap...
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Old 04-26-2012, 09:55 AM
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i dont know the deminsions of the factory turbos for the 7.3's however to me it would be presumable larger than an hx35 7.3 vs 5.9 youve got a little more engine. you should look for a wrecked turboes IDI and steal its parts. then look into what turbo you want to run. but your engine cant eat much more than 14psi.
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Old 04-26-2012, 10:22 AM
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ok so the factory turbo off of a 94 7.3 idi would probably work then? I think I can get one of those for about 100 bucks... whats the installation like on that? and will i need to pull anything off besides the turbo i.e. hoses, wires, etc...
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Old 04-26-2012, 10:33 AM
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you will need the manifolds. take everything from the manifolds to the intake.
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Old 04-26-2012, 12:22 PM
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ok thanks for your help!

---AutoMerged DoublePost---

oh also, what kind of guages will i need to regulate once i started putting work in this truck? I know an egt is essential but are there any others that are going to help me monitor temps in the tranny and what not?

Last edited by 7.3oldschool; 04-26-2012 at 12:22 PM. Reason: Automerged Doublepost
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Old 04-26-2012, 02:05 PM
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i dont bother with tranny gauges unless i am pullin -ALOT- all the time. a boost gauge an EGT (pyro) and a fuel pressure gauge are all pretty essential with turned up trucks
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