First off can someone tell me what ISB stands for? Is it as simple as HP? Second how do you tell which model you have? I am shopping right now and am curious on ISB's Also there seems to be a ISB 370 for marine applications. Does that mean there is a 370 HP CTD available? Still learning and looking for "the one". Thanks

 

Basically the ISB means that it is a Cummins operated by computer. You put this in the 3rd gen area so I cannot tell you much of what is offered. You cannot get the marine engine in the CTD though.

 

The "ISB" denotes the electronic iteration of the 5.9 B Series Cummins engine. The older mechanical engines were referred to simply as "B" series, which was modified when they went electronic with the 24 valve engine.

The ISB label is typically not used when referring to the Dodge, but is used for other applications to include automotive (think Freightliner FL70), busses, marine and industrial equipment. Check www.cummins.com for more information regarding the ISB ratings.

Cheers,

JPH

 

ISB is the designation for the Dodge engines since '98 1/2. I never saw a FL70 with an ISB in it they are ISC or better. The FL50 and some FL60's have the ISB. In the case of the common rail engines such as 2003 and above, there may be a difference as the commercial engine is a different buildup with the timing gears on the other end.

 

It is Cummins 'Interact System'. The third letter refers to the engine size/series. It is what they call the electronic engines for 'automotive' use or on-road. The offroad electronic engines are the QS series.

 

Easy to get 370hp from a B when you are using Sea-Water aftercooling.

 

Correct BB2S, but I wouldn't want that much horsepower out of a 5.9 turbo diesel used in a marine application. Why? Durability. I REALLY don't want my engine breaking down on me if I'm in the middle of the ocean. At least if my truck engine breaks down, I can walk, and I might even be able to get a friendly Crown Vic to stop and give me a ride. In the ocean? No way!

Keep on truckin'...

 

That is the stock hp rating on the QSB marine engine. They have B engines in military boats running 500hp.