Which Cat 3406 should I start with for maximum HP

The 5EK and 6TS are the same block with the same weaknesses. The 1LW, 5DS have a much stronger block. The 1LW does have issues with crank failures, but if it is still running today. I doubt you'd have a problem with it. You can also install a crank from a 5EK or 6TS in the 1LW block without any problems.

If you come across a 5EK or 6TS 475Hp/1750torque or higher Hp rated engine than you could easily get 750 Hp from it with a file and turbo change. To go above this Hp level you will need larger injectors and turbo along with the ECM upgrades. To get to 1200 Hp will require a camshaft also. I actually don't think you'll be able to achieve 1200 Hp without a modified file in the ECM, along with 59 injectors and a 1000 Hp camshaft and the proper turbo. Unless you're going to do sled pulling, I wouldn't try to get to this number. You can achieve roughly 1050 to 1100 to the tires without a modified file and retain good drive-ability. After this Hp level the turbo needs to increase in size to the point of them becoming very sluggish at low to mid engine RPM

as far as a 2WS or 6NZ 70 pin engine, it wouldn't be any harder to install in the truck. The problem will be finding one at a reasonable price

 

About to overhaul a 1LW factory 475 1850. Needs a head, Injectors, and an exh manifold so we plan on putting in tne marine 800 cam, 58 injectors and a PDI ported manifold. Mr. H what do you think for tune and turbo?It is a everyday work truck runnin at 100-110 gross. can u do a 2300 tune on this engine? not lookin to break any records just cant see puttin it bach together without puttin some poweer to it. Its an owner driven truck but he does pull sled with it on in the fall.
Thanks Mr. H.

 

Thanks, I couldn't remember if they changed the block on the 6TS or not.

What is the difference with the 6TS from a 5EK? I pretty well know all the differences with all the other engines but these two...

He could get more then 750hp out of the 58's if he put in a big ecm file and got a turbo to match it. Custom ecm tune would be just as effective without bigger injectors as it would be with them.

 

1000hp is pretty well just as easy with a Detroit. Biggest advantage I find over the Detroit is they are easier to get to higher rpm, not that they can handle it better than a Cat.

Aside from the 14.0l Detroits that are non egr (very few) your gonna only have 12.7l compared to 14.6 or 15.8 with a Cat. Unless you bought a 14.0l EGR motor and converted it.

You need to take a step back and figure out how you want the build to go...
do you want to rebuild the engine before you put it in? or do you want to run it basically stock for a bit? This decision would differ my choice in which engine I would want to initially install.

 

This parts combo will easily break 800 Hp with a right tune and turbo. The 2300 RPM is easy to do also. Call me now, PDI usually does their price changes on Jan 1

 

The only real difference between a 6TS and 5EK is that some of the lower Hp versions(but not all) of the 6TS went to steel top pistons where they were aluminum in the 5EK. Otherwise they are identical

750 is a slightly conservative number depending on the file and fuel codes. I don't play with the trim codes to gain more power

 

Yes the 15.8's have different serial prefixes. 5DS is the only 15.8 40 pin ecm and 1MM and 7CZ are 70 pin ecms