cummins ntc 350

Might as well figure $1200 to $1500 for a inframe kit, then add the price of retiming the cam, new injectors, turbo, and a pump tune if you want to basically do a stock 400hp.
Now you can put 400 injectors in the 350 and it will run , but sure will be rough starting in cool weather.

 

Speaking of putting 400 injectors in it as it is... A 350. Better off to tweak it as it as a 350 or tear it down and update with lower compression pistons to make a 400 as Smokincat mentioned earlier. As a 350 it will do fine if you take care of it.

 

I would assume they lower the compression so that more boost can be added. The only way to get more boost is to add more fuel.

 

man o man.

 

Ever notice when a blower is added to say a big block chevy, lower compression pistons are needed? @SmokinCAT may know better than I off the top of his head.... But if my memory is correct, a 400 would normally run like a 14.0 compression piston, and a 315 or 350 would run a 15.0 or maybe a 14.5 on certain engines. The turbo itself can help or hurt, depending on the other ingredients.

 

Yes lower compression so you can stuff more air in.

 

It wouldn't if everything was updated to a 400. I was making reference to tossing in a set of 400 injectors and the rest still set at a 350hp. Depending on what part of the country your in, flat or hilly, you may like the 350 with a little tweaking, then again you may hate it after being use to a 500+ hp. One of our last tractors at work had a 315 in it, matter of fact I delivered generators in NJ with it after Hurricane Sandy. It was tweaked a little before we got it so I'm not sure what all was done, but it wasn't bad actually, I never ran over 70 anyways pulling our lowboy.