thinking of a different truck to set up for street pullin,and found a couple 3500 6.7s on a salvage auction. thinking of a 6.7 with all 5.9 electronics and larger injectors with dual cp3s and a larger turbo-custom 5" exhaust. any thoughts on why this would or could not be a good setup. only things i can think of are camshaft differances-so install performance cam, and if ive heard wright the main diff is a larger bore,so timing differances I wouldnt think would bother anything? I suppose to get a hold of a cummins employee would be good if they'd give you any info. I work with cummins and iveco engines at work. theres also a 6.7 iveco with all the same bosch fuel system. nice super quiet engine very similar. was told at service training that cummins designed it and iveco buils it. any ways I would think a 6.7 with out the emissions junk thats ruining them would make big power??? thanks for any info.

 

I have often wondered the same thin... I am going to keep an eye on this thread!

 

I know the 6.7s have Egr so I don't know what you would have to do there. Also it could take some work to get the 5.9 electronics to work with the 6.7 gauges but I don't know this for sure. If you could get it to work it should be an interesting project.

 

I could always install the whole dash and elec harness from a 06 or 07 w5.9 if there would be any guage problems. a good friend works for the epa and just did testing on the 6.7. he has all the specs for both engines. also have a buddy thats the deisel tech at a local dodge dealer and has all the training on the 6.7s, got good help,now it'll just take $$$

 

Are the head bolts in the same location??? I think if you do some searching.. maybe check out the compD forum... I thought I heard of a someone already doing this??? Reb???

 

been there done that, works well, but the rods will only take so much. Also head gasket it weak. Need to change injectors also. If you were to put on a different ECM, i would go 03 early 04. 04.5 and above reqire a different bowel and may cause problems with 6.7 piston. 6.7 piston is designed like 03-early 04.

 

what did you run for a turbo? is the head gasket good with arp studs? how bout the 6.7 cp3- did you change that also or will it work. if you pm me id like to talk about it thanks

 

Ditch the 6.7 harness/electronics and all the egr crap. Swap in pre cr rods, 03-04 injs, harness, ecu, sensors, intake plenum. try and keep the cross tubes, rail and lines cause they are much nicer. I am workin on one right now doin a cross breed.

 

When they changed the stroke.. did they shorten the rods.. or just move the piston pin a little higher on the piston???

 

rods are the same, just moved the pin height up. I ran several turbos. As far as gaskets go you need studs, but you need the custom new age 625 studs. The older studs don't have the same clamping force, 210 k psi vs. 265k psi and 125-130 lbs vs. 155-160 lbs. With extreme abuse this is way i get these gaskets to live. Last 6.7 i built i fireringed it and the gasket head fine til the rod said "see ya", lol.

 

how much power was that motor putting out when the rod let loose?

 

1000 HP it bent 4 rods, put new rods in and 1175 HP it grenaded.

 

new stock rods?

 

im assuming the 6.7 compared to a 5.9 at the same hp would have more lug and torque? so the old 24 valve and 12 valve rods are good enough or does a guy have to go with custom rods?

 

yah, new stock rods was all i could get, afterwards i found some cunningham billet rods and used them in a 5.9 after. I like the 24V and 12V rods better. They are forged and the common rail rods are the powdered metal, cracked rods.