Common Rail 7.3 Conversion - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 40 (permalink) Old 10-16-2008, 08:51 PM Thread Starter
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Common Rail 7.3 Conversion

I am in the early stages of the long process of building a pulling/drag motor. I am still in the phase where everything looks good on paper. So it might be a pipe dream still.

I am trying to locate a Duramax motor to retrofit the Bosch ECU, injectors and CPS to a 7.3 PSD. I thought about using a 6.4 system, but the Duramax will be more readily available at this point in time.

I know I have seen some thought on the injector length difference between the different series on DM motors. There is a difference in injector lengths with one being more accaptable in length to fit our heads.

I am still investing money into the HEUI system for the red truck, but I want to do one a little more extreme for next year. Mechanical injection I considered pretty hard, but the cost will be equal to more than what I'm thinking the CR will end up.

Has anyone else tried this? Lets hear some thoughts on it.

2008 F-250 SCLB Larait.


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post #2 of 40 (permalink) Old 10-16-2008, 08:57 PM
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Re: Common Rail 7.3 Conversion

I want to know how people are getting the spray angles worked out. All engines with CR injectors are 4v heads.
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post #3 of 40 (permalink) Old 10-16-2008, 09:01 PM Thread Starter
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Re: Common Rail 7.3 Conversion

That would be good information, I can't answer. How similar or differant are the fuel bowl in the pistons?

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post #4 of 40 (permalink) Old 10-16-2008, 09:06 PM Thread Starter
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Re: Common Rail 7.3 Conversion

Here is a picture of a Dura piston. Discuss.

2008 F-250 SCLB Larait.


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Last edited by moore20017.3; 11-23-2009 at 06:32 PM.
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post #5 of 40 (permalink) Old 10-16-2008, 09:09 PM
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Re: Common Rail 7.3 Conversion

The piston bowl is largely irrelevant to what I'm asking. I'm talking about the fact that the injector is meant to sit 90 degrees to the piston face in a 4v head, and will have to sit at an angle off to the side of the piston in a 7.3 head.

With the same nozzle it will be spraying the middle of the bowl and the opposite wall.

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post #6 of 40 (permalink) Old 10-16-2008, 09:13 PM
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Re: Common Rail 7.3 Conversion

My question to the guys doing this is: Do you think its really worth it ?

For the amount of money for all the custom machine work for a extra few hundred HP........

For the price you could just as easily put a CR 5.9 in it......

Im all for advance on the 7.3 but this seems like a rediculous amount of time and money........Whats DOT got into his motor 100,000 $ ?

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post #7 of 40 (permalink) Old 10-16-2008, 09:14 PM Thread Starter
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Re: Common Rail 7.3 Conversion

Well, I thought 7.3 was on center of cylinder and 90* to the head. I did not know this.

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post #8 of 40 (permalink) Old 10-16-2008, 09:16 PM Thread Starter
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Re: Common Rail 7.3 Conversion

Quote:
Originally Posted by Dieselboy View Post
My question to the guys doing this is: Do you think its really worth it ?

For the amount of money for all the custom machine work for a extra few hundred HP........

For the price you could just as easily put a CR 5.9 in it......

Im all for advance on the 7.3 but this seems like a rediculous amount of time and money........Whats DOT got into his motor 100,000 $ ?
Machine work is basically free for me. Have access to many CNC machines. Now for the EH work on custom nozzles, I'm out of luck. But the injector sleeves and mounting for the CP-3 no problem.

Thought about a conversion, not gonna do it, gotta be a psd.

2008 F-250 SCLB Larait.


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post #9 of 40 (permalink) Old 10-16-2008, 09:19 PM
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Re: Common Rail 7.3 Conversion

Quote:
Originally Posted by Charles View Post
The piston bowl is largely irrelevant to what I'm asking. I'm talking about the fact that the injector is meant to sit 90 degrees to the piston face in a 4v head, and will have to sit at an angle off to the side of the piston in a 7.3 head.

With the same nozzle it will be spraying the middle of the bowl and the opposite wall.


That might be why the ones doing fuel system conversions have gone mechanical, not common rail.

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post #10 of 40 (permalink) Old 10-16-2008, 11:11 PM
 
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Re: Common Rail 7.3 Conversion

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Originally Posted by imelmo View Post
That might be why the ones doing fuel system conversions have gone mechanical, not common rail.
You still have the same issues. The injector spray angles aren't going to be off-the-shelf correct. An E9 nozzle would probably be the closest match for nozzle angle, but it's still going to need work I'd think.
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