Ok, its been a while since the webpage has been updated and it will be shortly. I have a few video's showing what we have right now.

Notice the injector is doing what we tell it

And also take note to the IDM (yes IDM not PCM) cuting the PW down to around .1-.2ms in the one video. As far as we can tell the signal going into the IDM from our controller is working fine, so it makes us believe that the IDM itself is keeping the PW from happening. If you call for higher than its limit it will just ignore and not even fire the injectors, or if you ask for right on the border it sounds like a rev limiter bouncing all over the place. We still have some testing to do on that part, but all that is needed is some software to intercept the PCM's signals and output what i want. Its coming together slowly. Also the vids are not dial up friendly.

http://www.youtube.com/watch?v=4jEqOtqrRWk
http://www.youtube.com/watch?v=lWU2R1IyouQ
http://www.youtube.com/watch?v=0l7GmU1vvKo

 

Damn man! That is some HIGH TECH stuff you got going on! I really like that, i learned alot about that in that segment where you explained what the meter was showing. Looks like you are on to some stuff, and if you do get this figured out and can deliver fuel up top, it's going to open up a whole new window of powerstroke performance....

 

Dude...I only have a BS...but that looks like some high tech sh!!!t there, I was lost at the 'proprietary program'....

 

I am very impressed with the effort. I almost pretty much know what you are talking about, but not really. Thanks for the videos because I have an idea what you are talking about now. Reps to you. Charles from you know where could probably answer a lot of those questions that you are answering but he treats it like proprietary info whereas you do not. Thanks for the education. So you figure the bottleneck is the IDM? What about the speed loss with the RS232 connector? Negligible? Not a factor?

What next? Before long you will be writing your own tunes if you are not careful, LOL.

 

What he said...should have payed more attention it school back than! But girls were more inportant than!! No computers than, just books, I used to hate reading, pics were ok !

 

Sounds like you need to build a high performance IDM module for all of us. Hmm a 7.3 powerstroke sled pulling at 5000 RPM

 

You'd better be careful or that window might be in the side of your block!

Fuel should be injected over the proper interval of crankshaft degrees to allow time for auto ignition so that cylinder pressures peak at about 20* ATDC. Therefore, the time duration of the injection event, or injection PW, needs to be shortened at higher RPM, not lengthened.

The correct way to make more HP at higher RPM is to inject more fuel in a shorter time duration so as to maintain the same injection interval in crankshaft degrees. The only way to do this is to increase ICP and/or get larger injectors. Using stock injectors and increasing the injection duration or PW at higher RPM will inject fuel during an inappropriate position of the piston relative to TDC, and nothing good can come of this!

 

Crazy stuff. That was way over my head.

 

I think he's using the RS232 just to program his IDM with data from the program on the PC.

You could probably program PLC's to run injectors from PC supplied data, but in my experience, the computer itself is not suitable for reading the sensor inputs and driving the injectors.

The computer itself can use the printer port to drive up to 8 devices (possibly injectors), and data input would be cheap and easy. Problem is, I doubt the printer port 8 bit output is capable of operating at speed necessary for running the engine.

Even a new dual core PC still has a slow printer port.

Anybody know what the actual voltage and pulse width limits are?

What happens if they get too much width in the signal???

How clean does the signal half to be???

 

The PW limits going into the IDM are
4.1ms 3000 RPMs
3.5ms 3500 RPMs
3.0ms 4000 RPMs

Now these are all close not exact = rounded or about that. lol

But If you go over the limit the IDM will not even fire the injector, or make an attempt to do so. And the more you get over 4k it really keeps dropping PW.
If you get it close it will semi-fire the injector as in the one video where the PW is changed just a little bit and it goes from working to coughing.

 

Talking strictly what the injectors could potentially handle.,.,,,

I suppose too many ms open at high RPM does not give enough time for the injector to reset?

Are you driving the injectors with a ford IDM, or a homebrew one?

 

Are you programming a ford IDM with a PC??

Videos are awesome, and this is an awesome subject, i just cant figure out exactly what youre doing....

 

Have you considered modding the IDM to 140v?

I'm curious to what effect this might have.

perhaps we could slightly overclock its processor?

 

Are you aware that the IDM will only fire one injector at a time, and above a certain RPM (upwards of 3700) the time allotted for the injector to fire is cut short by the next injector in line.... thus cutting out, shortening or just plain skipping over that injector's "firing time"? Thats the reason the powerstroke falls flat on it's face on the upper RPMs. If the IDM allowed more than one cylinder to have fuel injected at a time (Even at a normal pulsewidth of say 2.6ms, or less, the power would continue to rise as the injector would be allowed to fully inject and retract, up until the RPM that the injector cannot move fast enough to inject in the allotted time. And at that you can raise ICP to 3800, fuel pressure upwards of 200, and IDM voltage considerably to force the injector to work and fill quicker. The idea of this IDM testing is not to allow the injector to have a longer puslewidth at the wrong crankshaft angle, however to allow it to inject fuel properly at higher RPM's. We are coming to find out that the reason they don't rev out as high as a common rail or mechanical engine is that the IDM is limiting the RPMs. The main reason that the engines are blowing up like they do, is that the HEUI system is not smooth when it's up that high in the RPMs, and the rods dont like that sudden jolting so much.

 

What we need is a "multitasking" IDM.