2003-2004 the non ho/non 305hp pistons don't have the oil cooling passage in the top of the piston seen as 3 holes 2 on one side and 1 on the other. That's what the C and 6 codes differentiate.
All right Rob, I have a technical question for you. Just taking the Cummins inline six platform as we know it as the 12 valve 6bt and common rail ISB... This question has come to my mind and I do not understand completely and hoping you can shed some light on the subject. It is known in the 6bt that there are a multitude of piston bowl designs depending up on application. It ranges from the truck which is a small bowl all the way up to the 370 HP Marine which is significantly larger. Then we step into the common rail which first hit the scene in 03 to the modern design in the 6.7. I have noticed that the bowl design has gotten significantly wider over time and yet the overall compression ratio has largely remained fairly constant. Here's my question. How does piston bowl design impact power production, longevity and durability, and overall life of the engine? I understand the operational parameters with each design is different in comparing a mechanical versus a common rail. But even within the 6bt realm of truck(on highway) versus marine the differences are quite significant. We can observe using our eyes that they are different but why? Can you shed some technical light on this subject?
If you were building a cummins engine from scratch with mostly factory parts. Like using a 6.7 crank in a 5.9 block with a 12v head or something. what would you do
I have the ISBe 4.5L CR with the piston that looks like the 305Hp 5.9 and the 6.7 truck you displayed. I will be controlling it with the CM2150 ECM. What injector would you run? Have any recommended numbers? Thanks
Hello , I rebuilt my 12 valve Cummins with P- pump ,mostly stock , with marine Pistons . I'm trying to figure out if it need different injectors? [ When I cold start it , it smokes and misses] when I get on the throttle. Until it warms up but good idel . Only about 2 hours on rebuild. Wonder if RINGS need seated still .
When upgrading a 07 5.9 to the 6.7 what do you prefer small bowl or qsb? And any mpg difference you think? On mine I used small bowl same tuning. Mpgs the same maybe a little .5-1. Built for about 725hp
