more power out of a 90 7.3 - 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 04-29-2010, 06:02 PM
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more power out of a 90 7.3

ive got a 90 7.3 f450 and would love to feel some power, it runs great but it cant get out of its own way. is there anything i can do besides putting a turbo on it?
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Old 05-04-2010, 08:49 PM
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have the pump checked, and if its good turn it up and advance the timing. But the best power is the turbo. My old 86 had a 6.9 in it with a banks kit on it and it would throw down 205 on the dyno.
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Old 05-07-2010, 01:51 PM
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turbo and fresh fuel injection system- pump and injectors. the guy that bought my 90 said his brothers factory turbo 94 was slower. and these arent powerhouses. btw, my 90 had a factory 94 turbo on it.
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Old 05-12-2010, 10:04 AM
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The factory turbo trucks werent made to put out much power, look at the downpipe, plus the fuel settings werent really messed with (when you add air, you need more fuel to go with it for more power).

If you dont want to turbo then do this. Fresh fuel system, new IP and injectors and return lines. Instal a pyrometer into the exhaust manifold to watch EGT's. Turn up the pump until you are satified with power, though watch that pyro or you will melt it down. Get the timing set properly. Do you own intake and take out the restrictive exhaust and either buy one or custom make one. 3-4" exhaust work good on a N/A motor. You can also mess with propane injection.
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Old 05-15-2010, 01:59 PM
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The answer for more seat of the pants power for an IDI without turbo is: Get a turbo. Other gains are going to be minimal for the price. There are a few out there that have gotten significant power gains from many mods but they may have just gone with a turbo for the amount of time and energy spent on other mods.

my .02

Thad
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