IDI T or PSD which one to pick!! - Ford Powerstroke Diesel Forum
7.3L IDI (Non-Powerstroke) Diesels Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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Old 12-18-2009, 09:28 AM
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IDI T or PSD which one to pick!!

I just got a 88 7.3 IDI with a blown engine(only cost me 1500 and the rest of the truck is great). Im looking to to replace the engine with eather another 7.3 IDI T or a PSD. I know the IDI is cheaper to work on and easyer, but the PSD will put out more HP and TQ from what Ive heard. Jut wondering if a 7.3 IDI T with the fuel pump turned up, new down pipe, and pyrogauge compete with the PSD. I have driven a few PSD's and they all had great power but I have never driven a IDI so I cant compare, just looking for the most bang for my buck. I can get a used PSD and doner truck from a friend for cheap, but I also know a guy at work who has an IDI motor and tranny for sale that has some upgrades. So what do you all thinkg 7.3IDI T or 7.3PSD.

P.S. It will be an off roading, towing rig, so it will be driven on the highway a lot so mileage is important also.
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Old 12-19-2009, 12:16 PM
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my vote is idi my idi blows stock psd 7.3 away and mine only has a turbo with 8 psi and injuctor pump turned up a lil but i blew the head gaskets from over heating in -5 degree weather
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Old 12-19-2009, 12:57 PM
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Well after doing a lot of research I am really thinking about going with the IDIT because it is cheaper and easyer to work on. My only consern is I have heard a lot about blown headgaskets and cavitation. Is this something that is going to be a big issue with a tubo(probably stock, with bigger down pipe) and with fuel pump turned up and pyroguage of course.
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Old 12-20-2009, 10:42 AM
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i not a ford expert but all my friends work on fords at this shop we chill at and the idi i was told rarely blow head gaskets but i a chevy person lol cuz they dont break as much
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Old 01-22-2010, 12:21 PM
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Blown headgaskets happen but only after you get in the above 13 pounds of boost from what I have seen. Cavitation in the blocks is taken care of with additives in teh cooling system.
IDIs are hard to beat for economical operation if you do your maintenance.....

IDIT compares favorably to baseline powerstrokes by injector timing and fuel adjustments as per dyno testing posted on another diesel website
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Old 06-04-2010, 04:29 PM
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Neither. 12 valve Cummins. Much better engine than either-plus it won't be in a Dodge!
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Old 06-04-2010, 09:26 PM
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wow nice way to bring a post back from the dead.....
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Old 06-04-2010, 10:32 PM
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a cummins in the truck wouldnt be bad. if you put a turbo on that idi, stud it. friend here pushed his 6.9 passed 15psi on his gauge.
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Old 06-16-2010, 09:29 AM
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IDI all the way man. One day I will build one that will give some powerstrokes a run for there money. Not heavily modded powerstrokes mind you
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