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Old 11-11-2010, 02:39 PM   #1 (permalink)
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8.3 cummins performance

Anyone know if the 8.3 with the inline IP can have the power bumped up by doing all the same mods to the pump and afc as a 12v with the p7100? And what kind of power lvl's one could expect to get? Thanks!
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Old 11-11-2010, 07:11 PM   #2 (permalink)
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it depends on which exact pump it is (it could be a p7100, or one of many different inline pumps)

But, in short, yes. the same things that can be done to the dodge trucks can be done to the mechanical 8.3s
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Old 11-11-2010, 09:30 PM   #3 (permalink)
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what is this engine in? a Case tractor? Magnum?
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Old 11-12-2010, 04:37 PM   #4 (permalink)
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its in our aggreko backup gen at my work. It's nothing I would ever get to play with like that, but I was just curious what kind of power they would have if one did. I will look up the pump info when I go in tonight
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Old 11-12-2010, 08:53 PM   #5 (permalink)
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couldnt see the part # on the pump due to wear on the tag, but it is a bosch, approx 16 inches from front to back.
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Old 11-12-2010, 08:59 PM   #6 (permalink)
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couldnt see the part # on the pump due to wear on the tag, but it is a bosch, approx 16 inches from front to back.
Just go ahead and pull the fuel plate, plug the wastegate off, and put a straight pipe on!
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Old 12-02-2010, 01:06 PM   #7 (permalink)
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I have seen posts to the effect that the injectors used in the 8.3 are the same dimensions as the ones used in the 5.9. Anyone know for a fact? I am kind of drawn to the idea of using an 8.3 in my project... who is worried about a few hundred lbs when you are going to use 5 ton rocks? lol
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Old 12-02-2010, 01:44 PM   #8 (permalink)
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They are the same type of injector as the 5.9, but i dont believe they are interchangable...

I would go for a 5.9 over the 8.3 though. Even if you are on 5ton rocks, why make the rig weigh an extra ~800lbs for a big pig of an engine that has such a narrow powerband and is not really capable of making more hp than the 5.9, though torque can get pretty crazy, but then your just twisting off the driveline...


Depending on what you do, it might be worthwhile to use a large engine though. say, if you were to use the 5tons or some big portals, throw it on some huge (70"+) Ags and use it to basically just putt along and chew through the mud, then yes a hopped up 8.3 would be great. Wouldnt be much of a 'play' truck though, i think a 5.9 and some reasonable axles and tires would be alot more fun to rip around
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Old 12-02-2010, 08:04 PM   #9 (permalink)
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It would be going in this truck on 52" michllin's. I would like to put tranny setup like a spicr 6x4 behind it so I can et decent on road speed, and still have very low for offroad. Every now and again an 8.3 shows up for sale (for $3k) sometimes with or without a tranny on it, and they usually go for less than what people want fo a 2nd gen 12v. I figured that since the 8.3 used to come factory with as much as 450hp and 1200tq that with the same pump mods, I could have a stouter motor for a bit less money at the sacrifice of a few hundred lbs.
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Old 12-02-2010, 08:15 PM   #10 (permalink)
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a turned up 8.3 would be nice in that truck! . . . doesnt matter what pump comes on it, if its a p-pump run away with the mods. if its not a p-pump, find one, and let the mods begin. the power band isnt much of a concern because it is a dependant variable in the equation of modification. change the parts, change the powerband. the extra cubes would be more beneficial than the extra weight would be detrimental on a setup like that.
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Old 12-02-2010, 08:31 PM   #11 (permalink)
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I am going to be puting in an engine with a p7100 which ever size engine it is. I will also be going wit a single axle in the back, and proably shortening the frame a few feet... it's 26 feet long right now.
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Old 12-03-2010, 01:43 AM   #12 (permalink)
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Quote:
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a turned up 8.3 would be nice in that truck! . . . doesnt matter what pump comes on it, if its a p-pump run away with the mods. if its not a p-pump, find one, and let the mods begin. the power band isnt much of a concern because it is a dependant variable in the equation of modification. change the parts, change the powerband. the extra cubes would be more beneficial than the extra weight would be detrimental on a setup like that.
Tell that to an engine that will drop its rotating assembly on the pavement long before a 5.9 starts making real power

Modifications or not, of course the 8.3 is going to have the cube and torque advantage, its still not going to have as broad of a powerband as a 5.9

Again, depending on the particular setup and use, and how you like to drive, this may or may not be an issue
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