Well, its time to dump the detroit in favor of a N-14 Celect Plus. The N-14 is coming out of the same year Freightliner as the one the Detroit is coming out of. Anyone done a swap like this? Any suggestions?

 

imo... you'll not get better fuel mileage with the cummins

 

Well, I'm not looking for better fuel milage. The Detroit did 5.5 anyway. I'm putting in a 13 double overdrive trans. so it may after all improve a bit anyway. I'm just after a dependable engine. My Detroit evidently has some issues with the block. It has blown 4 head gaskets in 200,000 miles. Last time, I majored the engine and it blew another one at 71,000 miles, so I'm through with it.

 

no joke? wow. I dont blame ya. i would switch too. good luck..

 

I am getting 7.4 mpg with a 500hp N-14 Celect Plus with a 13spd and 3.43 rears.

I say that will beat any Detroit on Mpg.

 

It depends on the load, and how fast you're going. Basically how much horsepower you need to go down the road.

The engine that uses less fuel to make that same amount of horsepower, will get better MPG.

Saying that, I do think detroits are a little more efficient then n-14's

 

Yeah, my damn truck has 3.73 rears. So, I'm gonna try the double over 13 and who knows, I may have to slow down. Besides, 80mph just doesn't pay any more. It'll be damn nice just to be able to go down the road and not worry about how many months the damn engine is gonna hold together like I did with the Detroit. I've always liked the N-14 much better than the Detroit anyway. It'll do much better at a much lower rpm than that stinkin Detroit ever would.

 

I doubt it, had a Detroit before in a Freightshaker, nothing but problems, blew a head gasket at 550,000 miles and got rid of it.

Best mpg was 6.7, doesn't compare to 7.4.

 

Just wondering how many total miles were on the detroit. & how the swap went & how its working, fuel mileage etc.

 

bobtail mpg does not count. :lol: