victor25

I have spent hours searching with google tonight, but came up empty. I am looking for a piggy back module to turn batch injection into sequential injection. I figured someone must make this, but I found nothing. What I want to do is take the ground signal/output from the LH to the injectors on the S4 cars, and turn it into 4 or 8 individual sequential grounds to fire the injectors individually.
I do not have sufficient knowledge in electronics to do this, but I would think it shouldn't be too complicated. I would like to create a piggy back module that simply measures the length of the millisecond ground signal it sees from the LH.
Then ground each injector individually with the appropriate delay for the best timing on that cylinder. I am thinking very simple at first just to get rolling. Then "maybe" down the road have the ability to adjust that signal length so that cylinders like 5 and 8 get a little less fuel at certain rpm ranges.

What do you think.... has anyone seen anything like this?? Would it be simple to build such a thing??

When running the car with the sharktuner up on the fuel monitor screen, the injector pulse width is right there. Would there be a way to capture that data fum the LH bus signal line and use it?

So here is where the project sits as of 3-06-2014..

jeff spahn

I wouldn't want to use a shartuner. My sharts don't need tuning.

Lizard928

It would require a completely new engine harness.
Forget it. If you want to do this convert to full standalone and be done with it.....

MjRocket

Im wondering how many here have an actual standalone fuel management system? And are there any benefits to have said unit without being boosted?

victor25

How do you figure? Each injector has it's own connector and ground wire. Maybe a different injector harness maybe, but not the whole thing. I was thinking about tapping into the individual grounds wire where they all come together. I can see in the schematics how each side ties together and then the sides tie together at the LH. but I have not know where they actually come together in the car

jeff spahn

What would we gain from individual injection v.s. batch?

victor25

I am trying to accomplish a few things.
Mainly there is a resonance in the fuel rails on our cars. I have seen it on my car and others. It appears on both NA and supercharged cars. It seems like the larger the injector, the more obvious the affect is. I am not sure if the dead ended fuel rails make it worse or not, but it surely doesn't help.

it would also lessen the clicking noise heard from the injectors, and the need for dampers.

Ducman82

Sequential allows better idle, MPG, and power curve. to a point, high RPMS its all firing so fast i don't see a diff in my car. but grunt and MPG is way up.

if it was "that easy" to do, some one would have done it.

so how would you adjust that "delay" in a way the computer could understand? engine load, RPM?
not to mention the amount of fuel and Duration of the injector being open would change as well.

spend the cash and go Standalone. less hassle.

Ducman82

i have none of those issues with my set up. so Sequential for sure helps.

victor25

I have contemplated an aftermarket system on one of my cars. I would really like to have a COP setup and the ability to tune individual cylinders. But I am looking at this for a different and cost effective reason.

The 8 injectors would fire the same length for that cycle or the one signal from the LH. But the distance/timing between individual fires in that cycle would have to be shortened as the rpms went up.
And yes it it was easy and done I would have found it

MjRocket

Jake

So your running a stand alone system? If so what did the setup run you?

dr bob

So the system would read the pulse width and separately determine rpms. Ideally it would also know tdc on #1 cylinder. It would duplicate the initial pulse width to each cylinder individually, in firing order sequence,, starting 360 degrees after tdc #1 so it fires at the beginning of the intake stroke.

928mac

Here is the site for the stand alone system that I use

http://www.electromotive-inc.com/

here is the forum where the questions are answered

http://electromotivetec.freeforums.org/index.php

I have the Tec-4 GT and I believe that if I use the cam gear I can run sequential.

http://www.electromotive-inc.com/total-engine-control/#

victor25

I dont believe initially it needs to be that complicated. All 8 fire together currently, but I do not know when or where in the cycle that happens. They opening times and firing order would just need to be spaced out appropriately. With the lenght of open time matched to the lh signal. And the space between individual injector fires determined by dividing the LH signal spacing by 8 or 4

docmirror

Brad provided the link I was going to. I built one car with a V6 using the TEC3 running in sequential mode. It was a b-i-t-c-h to get tuned right. Lots of programming.

No reason to re-invent the wheel from the EZK where the crank trigger signal is fed. Just get the TEC3 and use their trigger wheel to time it. You can also use COP, or the direct fire they provide. The added benefit is you can trash the LH and EZK entirely. You also get to use the MAF, and the MP to provide acceleration adv curve and pulse injection modification.