I know this threads old but II have the ms3pro with 8ft wiring harness on order now .id like too ditch the factory injectors but I am not even sure where too begin they will need too be low impendance I'm swapping everything from my car over to one that had a fire I would rather not have that happen twice

 

good to see you back. 88,

just read all you can and use common sense when deciding on an approach of each part of the system, always be sure that each mod is compatible to the other/next!

keep us posted!

 

keep us up to date on this...

 

You do not HAVE to use low Z injectors. The MS3 is capable of pick and hold for low Z but you are certainly not limited to low Z.

A crash course on the theory behind injector Z, so don't fall asleep.

Next - impedance Z is actually an incorrect term here because we are talking about the DC resistance of the injector. Impedance Z is AC resistance and varies with frequency, like 50ohm coax has a DC resistance of 0.001ohms/ft the 50ohms is the impedance at its operating frequency usually 50Mhz.

Enough rambling by me, back to injectors. Jag injectors have a DC resistance of about 2.5ohms and are wired in 4 groups of 3 (later cars only earlier carts are wired differently).

The 4 groups of 3 means - 4 injectors wired in parallel and 2 groups are wired in series for each of the 2 injector drivers.

4 injectors of 2.5Ohms wired in parallel makes the group 0.625ohms then the wired in series with another 0.625ohm group makes the whole lot 1.25ohms that the ECU will see.

Now let apply ohms law I=E/R 9.6=12/1.25 so in this situation the ECU has to supply 9.6amps of current to keep the injectors open, this is a lot of current which will generate LOTS of heat so Jaguar install resistor packs to lower the current.

With the same 4x3 setup with 10ohm injectors the current draw would be much less. I=E/R 2.4=12/2.5 so you can see by using HIZ injectors of 10ohms the current the ECU has to supply to keep the injectors open is only 2.4amps as compared to 9.6amps.

I hope this helps

If I were you I would use a set of those after market LSX injectors with the 4 hole nozzle.

 

Jonathan w ill be more than happy too , car wasnt burnt too bad wires were a loss and the hood as well nothing else really. Ive pulled the wire harness for the abs out of my car I will be doing the same for my main harness from the computer. I am trying to find injectors I can swap out and run the factory computer has anyone done this?

 

I read a little about MS and others. And realized that I can not really set it up. And it will cost time and money.

I learned a little about X300 6.0 the Denso engine management system. This is a very good system.
I have almost all the wires, the ECU, the ignition amplifier. I do not only have ignition coils. This coil is three double in one casing Denso.
I have twelve ordinary coils from the V8 Ford-Jaguar.
So here's the question. I'm not experienced in electronics.
Can I install 12 instead of two three double in one casing Denso?

 

I do not think it will work with COP. The problem will be coil inductance (L) and resistance (R). And because the V12 EDIS is a wasted spark system you need to fire 2 plugs on each bank at the same time. Wiring 2 coils in parallel or series to fire them simultaneously could have the R and L too high (causing the engine not to rev) or too low (causing the coils to get too hot and fail).

This would be possible if the Dwell in the Denso ECU can be changed.

What I would do is buy 2 EDIS6 coil packs and it will work.

Here is some info EDIS Ignition Control

 

Low-z injectors are exactly that. Simply having a low resistance isn't enough, the combination of resistance and inductance is what counts - it gives a short time constant which gives a fast rise time for the current getting energy into the injector faster and getting them open quicker. It also gives a faster closing time.
In many cases the hold current is no more than that of a high-z injector.