Being a car guy and mostly messed with gas motors up til now Im curious. If diesel motors make more power with more fuel is there a reason I couldnt just plumb a nozzle into the intake to spray diesel fuel directly into the motor at WOT? Instead of bigger injectors, boxes, etc? Could use a fogger nozzle from a nitrous kit and adjust the jet size according to power or smoke desired? You guys think this could be conceivable to either make more power or bigger smoke clouds....LOL Just curious.

Thanks,
Tom

 

In small doses it would act like advanced timing - kinda like propane but not as clean.

 

And in large doses it would also act like advanced timing... WAY advanced timing...

 

That would be an interesting thing to try. The timing would be out of control but it might not matter too much. I don't see why the dosage would have much to do with timing. The volume is different than the timing. You're describing the same thing that happens when a diesel runs away, a separate fuel source that feeds directly into the intake. Like when diesels start running on natural gas fumes or when a piece of equipment rolls over and starts running on it's spilled air filter oil, etc. The description is always the same. The engine winds out and is hard to stop.

If you use diesel fuel it would be nice to bypass the turbo and feed it in near the intake valves to keep the intake clean and to make sure each cylinder got an equal amount. But you could probably just point the nozzle at the turbo intake. Seems a little rude as far as the blades are concerned. Maybe the best test vehicle would be an old Mercedes turbo diesel. They are used to injesting stuff through the turbo.

Just get yourself a Hudson sprayer and arrange the spray nozzle to point at the turbo. Put diesel in the pressure tank, pump it up, go for a ride and turn it on. Then take your foot off the throttle and control it with the sprayer.

On the Cummins you could mount six injectors in the intake manifold. One just before each intake port and turn them on with a switch to suppliment the regular fuel system.


Wetspirit

 

My vote is that your power will probably drop off. You gonna loss the combustion efficency that a hi pressure injector provides. There are reasons that the spray pattern is the way that it is. You could how ever drop egt's as it would cooling off the cylinder. You would have to shoot in a small amount of liquid and only hi boost conditions. I would hate to see your motor hydraulic from excessive fluid. You should just by a methanol system as the flash point for combustion is so much higher than diesel. She would be very smokey truck. Injectors are cheap. I have a set for every type of driving condition that I do. A small set for towing, a medium size set for street driving and a set of killer drag sticks.

 

how is $1100 a set for injectors cheap?

 

go to ebay and get a set of jammer nozzles for 150 extra hp. that will set you back about 250 - 300 bucks.

 

There are a LOT of injectors out there for less than that. Stage 5 nozzles (200hp?) are only around $200.

 

WOW thanks guys, all the ones ive seen for my truck are 900-1100 bucks. i can handle 2-300.

thanks again,
tom

 

Wetspirit...For the record...diesels dont run away....Mechanics run away.

 

stage 5 jammers are 150 hp and they are around 250-300

 

Got to thinking about this while mowing the grass yesterday evening. I think it will be a very bad and dangerous idea.

1. Since you can't control how much you dump into the engine, there's the risk of a hydrolock, which may be remote, but I can see the bigger chance of seriously increasing cylinder presures and popping a head gasket at the least, and cracking a head or the block.

2. What are you going to do if you squirt it and have to stop suddenly? You never know when a kid will run out in front of you, or deer, or what you may encounter around the next curve, or when tire will fail. These engines stop by killing the fuel supply, and once you've filled your intake with raw fuel, you won't be able to stop it till it's burned it all.

 

Can you imagian the mess this would make in the intake??????? Intestering idea though....kinda like Toyota's Cold Start injector in the early 90's 4-Runners with the 6 banger.........

 

it had been done before, and i have heard of gains in the 75hp range. but i would find a better way to do it on my own truck. i feel we can get all the fuel we want in a 12v so i can see no reason to try this route. but if you are trying to push the envelope, it may be something to think about.

 

In large doses, it would act like something called DETONATION.

Your headgasket will have a short life (measured in seconds) under these conditions.

At least the HG will likely fail before the pistons all melt-- cheaper repair that way.