How to have a one injection event common rail

Begle1

Begle1

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Nov 18, 2007
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If it's advantageous, and the computer can't be easily programmed to do so.

I assume that every time the ECM fires an injector, it pulses the injector the same number of times. True?


If it is true, then has anybody ever thought to make an electronic black box with some latches and FET's to count the number of pulses going to each injector, and only let a certain one through? It seems like it would be easy enough to do. Somewhere between "transistor radio" and "decimal calculator" on the DIY electronics scale.

Furthermore, it would be possible to have it come into effect only after a certain pulse frequency/ RPM; so you could keep two or three injection events below a settable RPM, and then cut it down to one injection event above that RPM.

Thoughts?
 
You would also need to control the timming of it. If you just cut out the pre and post and left the main the timming would be wacked on it.

There is no little box that will heal the crappiness of a stock ecm. Its just way too complex of a problem to be manipulated.
 
Does the bosch custom ecm allow you to do this? I know it's way out of most people price ranges...but just wondering..
 
I've thought about it too, it's not a bad idea.

Think along the lines of a redline box, have your new electronic black box take over control at some predetermined rpm (say 2600 rpm), take full control of injectors totally ignoring the ECM. Single shot injection, one table that has timing vs. rpm and one table that has injection duration vs. boost.

Get to tuning.... :Cheer:
 
GOT-Torque said:
I've thought about it too, it's not a bad idea.

Think along the lines of a redline box, have your new electronic black box take over control at some predetermined rpm (say 2600 rpm), take full control of injectors totally ignoring the ECM. Single shot injection, one table that has timing vs. rpm and one table that has injection duration vs. boost.

Get to tuning.... :Cheer:
Click to expand...

No, my idea is just to have a box count the pulses and only let every second or third one through. That way the ECM would still control the timing and duration, but the first or second pulse would never get to the injector.
 
you can have just one injection event with a cr.. the truck would rattle like crazy... we have so many events because of the higher fp and the way it burns the 3rd event is only for emmisions.. I would say we would still need 2 events... unless you change the bowl design and the injectors along with it which by then u might as well p-pump it...
 
There was a video a while back of a blue '06 hooked to the sled that was p-pumped. Can't remember who it was or where to find that video but I do remember it made the most attractive exhaust note I have heard in a while. I believe the guy was turning something like 5K+ RPM, sounded very sweet.

Joe
 
What would someone say if there happend to be a white 2.8 truck at Scheids turning 5k on a CR system? Probably crazy....
 
bdp said:
What would someone say if there happend to be a white 2.8 truck at Scheids turning 5k on a CR system? Probably crazy....
Click to expand...

I would say thats becuase they have the Bosch ECM.... And then I would say why stop at 5,000? :Cheer:
 
I don't have a dog in this fight but I'm just curious as to how much the Bosch ECM costs? I mean for all the money we throw at our trucks, and the insane amount that the big dogs pay out. Is it really that much money?
 
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