17* of 15* hpop? - Ford Powerstroke Diesel Forum
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Old 01-28-2008, 02:23 PM
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17* of 15* hpop?

i see this around all the time, what exactly are they? how are they better over the stock pump.
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Old 01-28-2008, 02:50 PM
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Originally Posted by dsl_pwrd_ford View Post
i see this around all the time, what exactly are they? how are they better over the stock pump.
7.3L Powerstrokes came with either a 15 degree HPOP or a 17 degree HPOP. HPOP stands for high pressure oil pump, and it is what makes our fuel injectors work. The 15* pumps were found in the OBS trucks 94-97 and the early 99's like mine. The 17* pumps were found in the late 99-03 7.3's and are a better pump beacuse they flow more oil than the 15*. Your truck should have a 17* from the factory.
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Old 01-28-2008, 02:55 PM
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would one off of a newer 7.3 fit on an OBS
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Old 01-28-2008, 02:58 PM
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yes they are 100% interchangable
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Old 01-28-2008, 03:04 PM
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is there any thing that you have to do to make it fit or will it bold right up and would it be a good up grade if i was to run small injectors.
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Old 01-28-2008, 04:14 PM
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Originally Posted by broncrider View Post
is there any thing that you have to do to make it fit or will it bold right up and would it be a good up grade if i was to run small injectors.
To upgrade an OBS to a 17* HPOP pump you also need a HPOP reservoir from an early99-03.

It will run up to hybrids injectors(230-260cc)
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Old 01-28-2008, 04:57 PM
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Do you have to change anything on a early 99? Or just bolt it on?
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Old 01-28-2008, 04:59 PM
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Early birds just swap the pump. Nothing else needed except a new gasket.
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Old 01-28-2008, 05:05 PM
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Ok thanks, I got a 17* pump, just waiting on a good time to install it.
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Old 01-28-2008, 05:34 PM
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so all i would have to do is get one off a newer 7.3 and just get the resivor. and were is that at. im not to sure on anything on the newer trucks.
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