Crazy IDI build ideas

[Duke84]

I think my crazy ideas have become border line insane. I sparked the interest of another local engine builder. We are going to experiment with a few things and probably blow up a few engines but it will be fun. He worked for international and Cat both now builds cummins and powerstrokes on occasion just to have something to do. As he put it we are going to see how many more holes we can put in his testing shop.

Now a preliminary question of stupidity since we can't find a direct answer online. We already know the obvious differences between idi and powerstroke. Would an idi ip mount up properly to a powerstroke?

 

[cozinsky]

Short answer is no, not without extensive modifications. I don't know why anyone would want to through that much work for so little gain when you can put a P pump on one using parts that already exist.

 

[Duke84]

Short answer is no, not without extensive modifications. I don't know why anyone would want to through that much work for so little gain when you can put a P pump on one using parts that already exist.

I was pretty sure it was a stupid question lol. Thanks for being direct though. Since I am new to building diesel and the other person is very limited with idi knowledge there will probably be a lot of stupid questions in the near future. When we start messing around with this insanity I'll start a new thread. Never know it may turn into a comedy thread

EDIT **

P pump conversion is 10-12,000 I could buy 3 complete trucks for that and that is used for competition drag and pulling if that's what I wanted I'd be building a cat not a small international.

 

[Haulinhorse]

That's certainly much "crazier" than I'm going to build. Eventually, I'd like to get to around 450-500 HP. Wes is going to help even if he doesn't know it yet.

You do that and you can haul me and the horse around!!!!

 

[IDIBRONCO]

You do that and you can haul me and the horse around!!!!

Maybe, some day, I'll take you up on that.

 

[Chemgrad]

You can run multiple IP pumps on your IDI to get enough fueling for 800hp. If you put a solenoid in line you could have a couple of the pumps returning their fuel to the tank and then flip a switch to add to the injector through a Y connection. I think that would be the easiest way to keep it streetable and sans smoke while also have the fuel to produce 900hp. Or you could set it up to run off of an electric clutch and so the pump would just sitting there doing nothing until you energize the clutch and then BOO YAH lots of extra fuel. That would probably be the best way to go because you would reduce parasitic drag.

 

[Thewespaul]

It’s not that simple, the pumps turning even with the ignition off are still pumping fuel through the transfer pump, and with the fuel shut off solenoid closed the metering valve is shut so the transfer pressure really doesn’t have anywhere to go. You run a high output pump with the ignition off at rpms above cranking you’ll lunch it because of transfer pressure spiking.

 

[Chemgrad]

If you use an electric clutch then the pumps wouldn't be turning. Is there a reason you couldn't send the pressurized fuel back to the tank?

 

[aggiediesel01]

It’s not that simple, the pumps turning even with the ignition off are still pumping fuel through the transfer pump, and with the fuel shut off solenoid closed the metering valve is shut so the transfer pressure really doesn’t have anywhere to go. You run a high output pump with the ignition off at rpms above cranking you’ll lunch it because of transfer pressure spiking.

About 1:20 into the video the guy pulls off what looks like the shut off solenoid wire for each pump for a few seconds each. What do you think he's trying to accomplish? And is he doing exactly what you say shouldn't be done except he's doing it for a short time and only at idle?

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[Chemgrad]

I don't fully understand how these pumps work. The wire he removes runs to what a fuel shut off solenoid that when de-energized stops the flow of fuel to the pump? That's not what I was proposing and if that's what it seemed I apologize for not making myself more lucid. What I was saying was running multiple pumps, for argument let's say three 150cc pumps which we will call IP's A, B, and C. A sits in the valley and runs the engine at all times, B and C are mounted to a plate on the side of the engine for now let's say where the AC pump is located. IP pumps B and C are being not rotating until their electric clutches are energized which can happen either with or after separate electric fuel pumps for those IP's are energized. IP's B and C can be either energized in tandem or with staging depending upon how the user wants. IP's A, B, and C are all feed into a distribution block which feeds the injectors. I don't see why this would not work but as I stated earlier I am about as far from an expert on these pumps as you can get. If this will not work I would like an explanation as to why though if that wouldn't be too much of a hassle just for my education. Thanks

Nope this won't work because of IP timing. Hopefully I'll be able to get back to sleep now that this is off my mind. I can't believe I forgot about the timing, meh.

 

[KGIA103]

Looks to me like he was trying to show that the engine will run on either IP by themselves. You can hear a slight difference in the idle when he removes and reconnects the wires.
Not sure about the electric clutch idea, in these pumps rotation is the built in timing mechanism, and to have multiple pumps not all synced and always rotating simultaneously would create issues with fuel delivery timing.

 

[Chemgrad]

Not sure about the electric clutch idea, in these pumps rotation is the built in timing mechanism, and to have multiple pumps not all synced and always rotating simultaneously would create issues with fuel delivery timing.

Yep that's the rub. Sucks getting old and waking up in the middle of the morning and not being able to get back to sleep because you have IP timing on the brain. So yeah that won't work but I don't see an issue of running multiple pumps together. As long as you have enough turbo to support the fuel I would think that would work fine.

 

[chillman88]

Sucks getting old and waking up in the middle of the morning and not being able to get back to sleep because you have IP timing on the brain.

I see I'm not the only one who can't sleep because their brain won't stop contemplating their projects! Makes for long nites sometimes!

 

[IDIoit]

biggest limiting factor of the IDI is the fuel.
just sat no to rotary and A pumps.

heres my 300-350 hp build.

3k into the rotating assembly.
2k into the heads
2k into the valve train.

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[IDIoit]

i attempted this fuel system on my finished block, but the vehicle didnt need more than a DB pump can provide.
so, my next build is going to be p pumped.
custom ip gear cover, and some other supporting stuff
idit block in the shop.
im talking 5-6k in the next rotating assembly.
ive already got the gear for the pesp.
heads are done
this is going into a 1/2 ton 41 ford pick up diesel gasser
tube chassis, and 31 x 18's with a 4 speed

its not about power when building a monster, its about power to weight.

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