5.9 cummins vs. 7.3 Stroker swapped in place of 5.4

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#16

06-06-2012, 10:48 AM

MisterCMK

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Quote:

Originally Posted by Fosters

This. I found one with a stick, perfect in every way - cab/bed config i wanted, nice wheels and tires, good price, etc. What turned me off was the bottle of stop-leak I found under the hood...

Too bad you bought a slow V10.

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#17

06-06-2012, 11:20 AM

Fosters

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Quote:

Originally Posted by MisterCMK

Too bad you bought a slow V10.

Hey, I asked you guys and was told to walk away from it:

https://www.ford-trucks.com/forums/1...ed-advice.html

And please, the V10 isn't slow. See, even this GT was running away from facing me:

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#18

06-06-2012, 11:47 AM

MisterCMK

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LOL

PSD > V10

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#19

06-06-2012, 12:30 PM

deck60

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both engines have their good and bad

my vote would be of course cummins

cummins+ easy to make 500hp for under 50.00 engine is designed for over the road use ease of maintenance and to work on parts are cheap and available 12v p pump or ve will run a long time upwards of 750k
+

7.3 binder cant think of any positive ---- maybe a little quieter they do warm up faster in the winter

it is personal preference if you want to keep it all ford then use the binder engine if you want a great truck that really performs then by all means use the cummins you wont be disappointed at all

the cummins fits in so well and really wakes up the truck looks like it should be a factory install

I am not dinging the 7.3 it is probably the best engine ford has ever used but the numbers speak for them selves

case #1 me and a friend pulled identical loads back when my engine was in a dodge chassis
30k weight average mph 55 650 mile trip
98 dodge 12v 3500 mpg 10
2001 f250 5.5 mpg

both performed well under this extreme load the cummins might have been a little better in the take off speed the ford was a little better at 50-60 speed both were pretty close to say the least I just used less fuel

if you use the cummins match your gearing to rpm this engine 1850-1900 is your best fuel mileage best power 1800-2100

and remember no matter what engine you use more hp = less mpg

it takes fuel to make power

do your reasearch on the manual trannies and drive all the zf5- zf6 and the nv 4500 and nv5600 remember you want to look at the final drive ratio you will find they are real close the 6 speeds don't give a higher finial drive ratio just another gear getting you there unless you are puling 30k in weight a 5 speed is really better

and if you use the nv trannies that will save you about 1000 that you can put into other mods than a tranny adapter and the zf is a taller trannie you will have to put in a floor pan from a manual truck

if you want more info let me know I have lots of conversion info

remember this is a major undertaking do your research and have a full plan in place and tools and equipment and the know how or some you can count on that has the know how this is by no means a conversion for a amateur to do

you want to be able to have some chair time while dong this conversion to do some extreme thinking to do it right it will take some real out of the box thinking any one that criticizes some one that has done it really needs to sit down and think of what kind of undertaking this is and respect those that have done it

D

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#20

06-06-2012, 02:58 PM

BigBlue99

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deck60,

I have a transmission question that you may be able to answer. I have never done such a project, but I have access to the tools and means to definitely do this in the future. Time and money are my only blocks at the moment.

I see that your truck has the NV4500 with the NP273, I have heard that there are 4th or 5th gear problems with the dodge 6 speed but those problems are easily cured. how well does the dodge trans and t-case fit in the ford, and how does the driveshaft mate to the back of the t-case (splined or flanged), and I am sure cross member modification and relocation will be required but how difficult is that?

I like the idea of using a ford 7.3 ZF6 because from what I have read I could use a dodge 6 speed flywheel and the stock clutch from the 7.3 ZF combo. Basically everything but the motor will be ford in this set up. I understand that the complete dodge set up would be easier in some ways for part compatability but if I were to come up with the parts over the next several years I may just buy the components that first present themselves at a reasonable price.

From what I understand I have a NV 271 t-case behind a 4r100; I still need to find out if that t-case will work behind a 7.3 ZF (just in case I find a lonely 7.3 ZF6 4x4 w/ or wo/ a manual t-case), and drive shaft mods may not be needed if all the stars line up. Then I may also be lucky and find a cummins with a manual flywheel and it will not matter if it was 4x4 or 2wd.

One more question before i get too far ahead of myself. I see that FordCummins does not offer an adapter plate for the modular ZF5, but they do on the 460 ZF. Destroked offers a gas ZF5 adapter, but does not specify the exact gas motor it mates to. The reason I ask is because I found a 99 f250 4x4 with a manual trans and manual t-case with a bad motor for under $1000. if the trans would mate to a 12v then I may consider buying the old POS. Let me know what you might know. I am sure I could call destroked or fordcummins, but I would like to hear some experience input.

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#21

06-06-2012, 03:45 PM

Fosters

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The 5.4 and 6.8 have the same trans(bellhousing) pattern, hence why Destroked won't specify which gasser, it doesn't matter.

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#22

06-06-2012, 03:58 PM

deck60

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I have a transmission question that you may be able to answer. I have never done such a project, but I have access to the tools and means to definitely do this in the future. Time and money are my only blocks at the moment.

I see that your truck has the NV4500 with the NP273, I have heard that there are 4th or 5th gear problems with the dodge 6 speed but those problems are easily cured. how well does the dodge trans and t-case fit in the ford, and how does the driveshaft mate to the back of the t-case (splined or flanged), and I am sure cross member modification and relocation will be required but how difficult is that? I used the 5 speed from what I have heard the fispeed had some fifth gear nut working loose issues but there is a positive fix for that the dodge uses a 29 spline output

I like the idea of using a ford 7.3 ZF6 because from what I have read I could use a dodge 6 speed flywheel and the stock clutch from the 7.3 ZF combo. Basically everything but the motor will be ford in this set up. I understand that the complete dodge set up would be easier in some ways for part compatability but if I were to come up with the parts over the next several years I may just buy the components that first present themselves at a reasonable price.
If you use the zf6 get the floor pan you are going to need it you will have to cut and replace the floor pan

From what I understand I have a NV 271 t-case behind a 4r100; I still need to find out if that t-case will work behind a 7.3 ZF (just in case I find a lonely 7.3 ZF6 4x4 w/ or wo/ a manual t-case), and drive shaft mods may not be needed if all the stars line up. Then I may also be lucky and find a cummins with a manual flywheel and it will not matter if it was 4x4 or 2wd. In my case I used a t case from a dodge used the ford front tcase driveshaft coupler and the dodge slip yolk shortened the driveshaft 2" and dropped the crossmember 1.5"

One more question before i get too far ahead of myself. I see that FordCummins does not offer an adapter plate for the modular ZF5, but they do on the 460 ZF. Destroked offers a gas ZF5 adapter, but does not specify the exact gas motor it mates to. The reason I ask is because I found a 99 f250 4x4 with a manual trans and manual t-case with a bad motor for under $1000. if the trans would mate to a 12v then I may consider buying the old POS. Let me know what you might know. I am sure I could call destroked or fordcummins, but I would like to hear some experience input. this is not in my area of expertise
I do know that to put in a 7.3 in where a gasser is more of a headache then putting in a cummins we looked at this for a friend before
for the best bang for the buck this is what I would look for a 2wd std cab dodge with a manual bet you can find one cheap then change it main shaft in tranny and input in your t case on your ford and you good to go

this is how my build went I had a 98 12v truck with and auto trans so I sold the auto trans and tcase from my dodge then I sold the v10 tranny from the ford traded the ford transfer case from ford for a dodge one that I was told was a manual but was a auto so I changed the input shaft from allstate gear problem solved the tranny I picked up on cl was a 2wd bought a new main shaft from midwest trans bought a rear 4x4 tranny casting a cast iron one off ebay shortned my rear driveshaft made my motor mounts I called southbend clutch and he told me use the ford master clutch and a slave from a 95 jeep the bore -stroke are almost identical

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