1st Generation 12 Valve:
Years:89-93
Fuel System:Bosch VE Injection Pump/Mechanical
My Opinion: Good Trucks and great engine, cant make huge stupid power but there are guys up over 500 with these trucks. Very simple to get more power out of these by just tweaking the pump.


2nd Gen 12 valve:
Years:94-98
Fuel System: The Legendary P-7100 Injection Pump/Mechanical

My Opinion: The holy grail of the diesel enthusiasts trucks, these engines can make stupid rediculous horsepower, can turn these things as high as you can go and go vroom , great truck for sled pulling because of the unlimited possibilities with injcetion pump. Only down side they are hard to find in decent shape that havent been BOMBed already.

2nd Gen 24 valves:
Years:98.5-2002
Fuel: Vp-44 Not the best

My Opinion: Not a bad truck the injection pump leave a little to be desired if you dont put enough fuel into the injection pump it will fry it whcich is where a FASS or Airdog lift pump come into play to keep the pump happy and supply us with enough fuel. Good truck great engine cant ever go wrong with a Cummins

3rd Gen Common Rails:
years:03-07 5.9 07.5-Present 6.7
Fuel:CP3 supply Pump
My Opinion: These engines are really starting to catch on and guys are getting huge power my adding dual CP3's and huge injctors and really aggressive tuning. It is still the cummins so once again you cant go wrong.

The new 6.7 Cummins has all the Emmissions stuff on it and i would stay away from these they get bad mileage and havent got all the bugs out of em yet


Now for the rest of your questions:

VB-Valve Body its in the transmission
TC-Torque Converter
3-4K GSK-Governor springs for the 2nd gen 12v's with the P-7100 pump, lets you turn more RPMs
100 Injections-Just like it says 100 horse power injectors over stock flow more fuel
FASS 150-Lift pump that flows 150 Gallons Per Hour
Hot Rod VP-a varation of the VP-44 Injection Pump for the 2nd Gen 24v, some swear by them some say your better off with a stock pump
Boost Fooler-Fools the ECM on electronically controlled engines to show 0 PSI of boost and keep giving more fuel



Anymore questions ask, my eyes are crossed and my fingers are cramping

 

haahaa you are awesome!!! THANK YOU!!!

why does it seem like the only thing you gotta do to get more power is add more fuel? Do people port n polish and work these motors over..



PS I am going to guess your pic of a truck would be a cummins 12v for cheap (california btw) truck that might last awhile? What would you do if you could put 4k in the motor and what kind of power should be expected? I know a chevy 350 and a thing or 2 about ford (like they should have kept the 460 and just upgraded the fuel injection)

3-4k valve springs ? makes sense but rev up a diesel sounds like it might

if you can think of any other good advice or a place to find it. You guys are @#$%in rock solid!! I admit a little diesel envy my budy has a built cobra that I would love to see get spit out by a cummins

What are your typical mods and well let's go with fuel injectors. What kind of results do you get from adding what fuel injector with obviously an upgraded fuel pump behind it?

 

there are some guys that do the port and polish jobs on the trucks but unless you are trying for ungodly power it isnt needed.

believe it or not you can rev the 12v cummins motors pretty high I have a 3k spring on my cummins and it sounds awesome and doesnt require heavier valve springs.

well for the 12v cummins depending on the year and if it is a stick or auto you wont need to worry about an upgraded pump but you can mod the one you have with simple stuff they have a fuel plate in them that can be replaced with a different one or you can grind your own.

as for injectors alot of ppl will say the 370 marine injectors because of price and power output but the biggest problem is the spray pattern can cause piston damage but there are a ton of aftermarket injectors out there for them.

I would say after you get a truck go through the classified ads on here and there should be a ton of used parts that ppl are swapping out and you can really save alot that way.

 

alright now this is probably a strange quesetion..but...lower gear or higher gears? seems to be a diesel has the tq to turn the big tires and gears so you'd get better gas mileage and effective wheel spin while mudding with a lower gear ratio..but that's against everything I know about wheeling..low gear ratio = good but..with that much torque..? ya I know soo many questions

Thanks for the patience here. I don't have an issue with spending the money on the right parts. I planned on a banks package and was a little curious (I know nothing about turbos) how to up boost and how much boost is safe with that block?

 

dont go with a banks, he is awful proud of his stuff and you end up just paying for the name, most all the Cummins you can hit 50 psi and be alright, but 40 is about all you would want on stock head bolts after that it all up to you there are guys running 150Psi thru these trucks not on the street mind you but on the track

 

Gearing depends on the year and the transmission.
Automatic I would go with 4.10's
NV5600 I would go with 3.7's
the G56 only came in 3.73 until 07

 

ok fair enough 40 PSI???? HOLY boost batman!! What are the old 12v running stock? Not to keep asking all these crazy questions.

What is the process of increasing boost that much? I am assuming that's where the high flow injectors come into play and the pump modifications? How tough is it to make a 13 second diesel out of curiousity..you guys are talking pretty high boost numbers that won't shatter rods or ?

Obviously not I suppose as you said it's possible..The cummins block must be stupid strong. At say 35 psi with injectors someone woudl be running XX horsepower? And why don't they rate diesels in torque as that is what they do best?

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has anyone seen that video? Sorry to ask stupid questions if they are stupid.

 

most of the guys running that high of boost are your dedicated sled pullers and drag racers and probably have well over $70,000 into there engines would.


35 psi is not hard to reach i can hit 30 and i dont have alot done to my truck i could hit 40 but i would have to plug my wastegate and then i could overspeed my turbo and that would be bad...

To get 13 seconds you need to get a good programmer free up the breathin with an intake and exhaust and just know how to drive, a Duramax with EFI live can get into 13's.

 

Ok that all makes sense. seems to me for straight line speed duramax has it on lock down but if you plan on pulling or putting a heavy loads on the truck nothing beats of cummins? big shocker there. besides gears what do you guys think stick to auto?

 

stick