So I've been looking at getting a 6BT for a swap into a truck, and was wondering if any DFers did major mods on their Cummins to get more power/torque and what they were, as I would like to get more HP and torque than a stock Cummins comes with.

 

I should also make mention that I am looking at a 12V not a 24V or 24V CR.

 

all depends on the generation of engine as to what kind of performance you can gain.

there are 3 different engines that would work for a swap.

you could do the first gen 12v which has a VE pump but can only be tuned to a maximum of 450hp.

you could do the second gen 12v which has the p7100 pump and can be tuned to around 1000hp before aftermarket pump is needed.

you could do the second gen 24v and convert it to p7100 so you don't need the computer, and it can be tuned just like the 12v, but it will be capable of more hp yet due to the better flowing head and double the valves.

just make sure whatever you are swapping the cummins in has the frame and parts that can hold up to it.

in other words you need D60 and D80 axles, 241HD xfer case, NV4500HD or NV5600 transmission, (or built 47re from DTT, suncoast, goerend, ats, etc..)

 

jigabop is right on the money with the options,


you have the the diesel nv4500 goin behind ur gasser right? if so, with my expierence your eaisiest option would be to go with any one of thoes engine setups mentioned, you can swap the bellhousing out and bolt the cummins to the trans, a set of 94-02 cummins engine mounts will bolt it to your stock locations, then its just a matter of little stuff to finish it up.... 96 cummins engine harness and pcm, 94-97 intercooler, piping, radiator, a/c lines (might need a/c condenser also) throttle cable, 94-02 air intake, right side battery tray and wires and its literally all bolt on stuff

 

dodgetrucker75, Originally I was looking to swap a Cummins into a 1988 Ford, but I threw that idea out the door since I can convert the 24V cummins to a p7100 non-electronic pump. So now I'm a going for a 2001 or 2002 Ram 3500.

Looks to me like I would be getting a 2nd gen with a 24V, and get a rebuilt pump and injectors to match, as well as better valve springs:
http://www.blacksmokin.com/bosch-p7100-injection-pump

Looks like the technical name for the 2nd gen 24v is the ISB5.9:

http://en.wikipedia.org/wiki/Cummins...engine#ISB_5.9

What about runnning larger turbos or compund turbos?

So I'm gonna stay in the Dodge world

 

Dodgetrucker75, I am swapping a NV4500 behind my gasser, not planning on swapping a diesel into it right now cause its got about $3000 into the gasser, so its gonna stay put in their for awhile! What I am wanting to do is get a non-computer controlled truck for reasons I cannot explain at this moment, as well as it being heavy-duty.

 

yes you can convert 24v to p7100, you will need custom injector lines made for it, and IIRC you need the 24v injectors you plan on running setup for p7100 pop pressures instead of vp44 pop pressures. still a 24v injector, just a different spring inside it behind the pintle so the injector opens up at the pressure specs for the p7100. Chris@DFI can build you a set of injectors just for that, and the p7100 swap is all bolt on stuff, you just need either a doner truck, or now a days aftermarket has caught up with the swap and you can buy a complete kit to do the swap, or you can go on the cumminsforum classifieds section and look for someone selling swap parts. seen someone last week on there selling a complete swap for like $2k. (timing gears, pump gears, timing cover, lines, 185hp p7100, etc)

still need a goal HP though so we can suggest what turbo(s) to run and what injectors, as well as fuel plate and timing settings for the p7100.

 

I'm a gonna aim for 450-500HP.

 

that's it?

ok, question two...

what do you plan on doing with the truck, and how soon do you want said power to come in...it can come in late for cheaper, or early for more money, and depending on how early depends on how costly it gets.

initially though I would say you can get away with 500hp on 7x.010 injectors and light tuning to the pump.

turbo or turbos will determine how soon the power comes in. triplets will spool extremely fast and have power at maybe 1350rpm, twins we can get power in around 1500-1800rpm depending on their size, or a single we can get power around 2200rpm

the rpm's I'm giving you are approximately the start of the hard set you firmly back in your seat pull in the powerband, not where power peaks. cost between single and twins are not too far apart, but triplets is a big price difference, and for the fastest power hit it would be even more of an increase.

I'm guessing you are going to want a single or twins and in that case a couple good singles would be either a 63/68/14 or a 62/71/14.

for twins we can go several different combos depending on how fast you want it to spool, or if you want to leave room for future power increases..

examples would be like a hx35/hx50 twins, or hx35/ht3b, hx35/bht3b, hx35/s472, he351cw/S475, S357/S472, S357/S475.

injectors are based on a 24v with either p7100 or vp44. should put you in a solid 500hp range. with my vp44 pushed to the max with my injectors I can hit 550hp on the rollers.

A p7100 can push them even further and likely get 600-650hp out of that same set of injectors as it can push higher volumes of fuel through the injection pump. you don't need to push it that far though and can control your power with the fuel screw and fuel plate on the p7100. ideally you don't want to push that pump too far or it can run away. but the injector size gives you plenty of room to turn up or down the power. you can go as low as roughly 375hp depending on turbo(s) (you have to grind the fuel screw notches off to get it to fuel hard enough to run away so don't get worried about that.)

 

Ok, to answer question number two:

What is the truck gonna do? Towing. Mad towing! Wanna be able to tow 22K+. So maybe 500HP is a little conservative LOL.

From the RPM Ranges you mentioned, I would probably want twin turbos.

IDK what transmission it's gonna get yet, either NV5600 or ZF6, haven't decided yet.