6.9L is a canidate for my 4x4 rig. I want more torque-

[Huntersbo]

Cummins 12 valve Banks:
385.6 lb-ft (1900 rpm) 696.6 lb-ft (1900 rpm)
stock Banks

160.3 hp (2400 rpm) 264.0 hp (2300 rpm)
stock Banks

Ford 6.9L/7.3L IDI
176 hp (3000 rpm) 260 hp (3000 rpm)
stock banks

360 lb-ft (1400 rpm) 503 lb-ft (1500 rpm)
stock banks

 

[Huntersbo]

It is looking like the IDI right now.

 

[JLDickmon]

I would expect a straight six to be easier becaue it is narrower. Areant they efi?

pre-96 they're mechanical

 

[95_stroker]

pre-96 they're mechanical

You could get a 12 V all the way upto 98.5.

 

[Huntersbo]

That 12V cummins was looking like 180 more ft/lbs of torque and a few more mpgs. I have a terrible habbit of not reving past 3000 rpm in my gas engines because you are loosing 50 hp and have no torque (working aginst you self up there) the cummins is lower reving I think and the 7.3 is spread out a little I think. I think that the gas mileage should be the same if the 7.3 was not reved more than the cummins and they make the same torque when tuned all the way I think. Which one hangs lower at the oil pan?

 

[Huntersbo]

The cummins is a good motor. Peak power at 2400 means less frictional hp loss than at 3000. 17 hp loss at 2500 rpm and 21 hp loss at 3000 rpm. The extra torque would pay for the higher gear needed for lower rpms. 3.73:1 with the cummins and 3.96 with the power stroke. I think that I would get equal utility out of each. I looks liek it really comes down to what is the best looking diesel I would find.

 

[94f450sd]

while i hate sending people to other sites im gonna send you to our sister site so it will be OK.

www.oilburners.net .those guys are nuts when it comes to high powered IDIs.they will tell you what to get and where to get it from.i never got into modding my 7.3 IDI.but man did i mod the crap out of my power stroke.

 

[Huntersbo]

I am already a member there with the same screen name. I could not figure out how to post a thread.

I have done a fair amount of studying and have found that the main flaw with the IDI holding it back is the precombustion chamber and I even recall somebody talking about putting direct injection later powre stroke heads on a IDI block with the mechanical injection an had a loud enine.

thanks for all the great help!

 

[94f450sd]

I even recall somebody talking about putting direct injection later powre stroke heads on a IDI block with the mechanical injection an had a loud enine.

where did you hear that?they had to either lengthen the IDI block or shorten the PSD heads for it to fit.the PSD is quite a bit longer then the IDI.and the injectors are in the heads.there is no way that somebody has done this.

 

[Huntersbo]

It was just heresay to begin with.I read it on a thread somewhere in the past that someone wanted to do that.