HP differences out of same engine???

[ozzie tractor]

My 1996 12 valve dodge cummins diesel has:

Low pressure line to fuel heater and lift pump
steel line to injector pump
steel line to each injector
steel line from injector pump terminating in low pressure line to fuel tank

From internet reading I understand one can increase the horse power of this engine by some very simple means.

Open up the injector pump plate
install larger injectors
and then there are a host of other things that can be done.

Now I surely do not know how this all works but I'm sure one of you fellows out there does!

check out my last few posts. egon. you increase the fuel pump output, which in your dodge's case also forces you to up size the injectors to flow enough fuel.just make shure the rest of the engine's sytems will support the extra demand, (exhaust, inlet, cooling and drive line. also be aware of added under bonnet heat, things may suddenly get a lot hotter)

 

[RobJ]

Nope, just the two diesels I already modified with custom larger injectors. Like I said, it works great if you don't mind a little lower fuel mileage and a little more smoke, espcially under load.

And you've put this on a dyno to prove you are getting more hp. Checked exhaust temps? "Seat of the pants feel" in a car is a worse judge for a 10-20hp gain. Seat of the pants feel in a tractor?....well what do you think.

Heavy black smoke means you've got more fuel than the engine can handle, especially in a little 3 cylinder CUT. Looks pretty though.

 

[RobJ]

I'm kinda confused with all the statements made on this thread. I'll also admit I am not very knowledgeable about the mechanics of diesel injection pumps or injectors.

I went out and looked at my Kubota B7100 HST. Its probably as simple as an injection system can get.

Gravity feed to injection pump
a steel line to the top of each injector
another steel line from the midpoint of the injector that conects all three injectors and teminates in a low pressure line to the top of the fuel tank

My 1996 12 valve dodge cummins diesel has:

Low pressure line to fuel heater and lift pump
steel line to injector pump
steel line to each injector
steel line from injector pump terminating in low pressure line to fuel tank

From internet reading I understand one can increase the horse power of this engine by some very simple means.

Open up the injector pump plate
install larger injectors
and then there are a host of other things that can be done.

Now I surely do not know how this all works but I'm sure one of you fellows out there does!

You have in inline Bosch style injection pump. Read up on the links I provided. I believe the Cummins also use the Bosch style syste. As Ozzie said if you crankup the fuel, the injectors may need to be changed for the added fuel or to better atomize the extra fuel.

But make no mistake the injection pump meters 100% the amount of fuel. Why is the shut off, throttle all on the injection pump? Pretty simple.

If I put a 2" garden hose on my 3/4" water valve do you think I will get more water out of the hose?

 

[SkyPup]

Yeah, I know about the excess smoke problem with the bigger injectors.

Next step will have to be installing one of the spare Garrett turbochargers hanging on the wall in the barn onto the exhaust manifold and rigging an intercooler to cool down the added one atomsphere of boost.

 

[Egon]

Fellows, my truck is stock. I just noted what could be done.

 

[ozzie tractor]

Yeah, I know about the excess smoke problem with the bigger injectors.

Next step will have to be installing one of the spare Garrett turbochargers hanging on the wall in the barn onto the exhaust manifold and rigging an intercooler to cool down the added one atomsphere of boost.

if you are going to do that please will you find the max fuel screw and give the thing some more fuel, will increase fuel pressure at injection, this will give more fuel (plus more HP) as well as increasing the effieciency at full load. when you do set the system up, do it on a dyno, with exhaust temp meter. very easy to melt exhaust valves and pistons. it funny but the more boost you shove down its neck he cooler the exhaust temps are, until you turn the fuel up again. then they go way up.

 

[ozzie tractor]

Fellows, my truck is stock. I just noted what could be done.

and that my friend is the best way to leave the things. if you want a engine with X amount of HP, buy one with Xhp. they last way longer, cost a lot less, (trust me after you much around with all this stuff, it will be less) are better on fuel and the support systems will keep up. it is a very well designed power up system inded that can supply OEM reliability etc. not just grabbig a turbo which is hanging in the barn (skypup are you serious). the whole system has to be matched to work, make power and be economical, and without smoking out the neighbours.