15 replies to this topic

[3VOLUTIONIST]

Saw one pop up for sale cheap and I've read about the late model ones being tuneable, is this the case with the VI computer? I have an evo 3 AFM, injectors, and fuel regulator. Is it possible to use the VI ECU with these, would I need to upgrade my fuel pump, and how tuneable would it be?

Never really looked into it as I just assumed your couldn't mix and match late model computers with early model cars but if I can get away with using what I already have over spending $500 on an ECMLink that'd be great

 

[evo-gsr]

I have an E6 ecu in my Evo. I have speed density and eflex tune on mine. So yes they do work in the early cars and yes they definitely can be tuned.
You might need to use the e6 afm and injectors depending on how you want to set it up.
I do know that the pinouts on the ecu are slightly different so you need to rewire a few wires which is easy enough.

[evo-gsr]

Im pretty sure you can use any of the E5-8 afm and injectors with the E6 ecu also. My tuner told me to get an e8 AFM before I decided on the speed density setup.

[3VOLUTIONIST]

I have an E6 ecu in my Evo. I have speed density and eflex tune on mine. So yes they do work in the early cars and yes they definitely can be tuned.
You might need to use the e6 afm and injectors depending on how you want to set it up.
I do know that the pinouts on the ecu are slightly different so you need to rewire a few wires which is easy enough.

Tbh I haven't a clue what a speed density or an eflex tune are
I can get my hands on an Evo 6 AFM, but I thought the injectors were all the same? or are they slightly bigger than the 3's

Rewiring some stuff isn't a problem, I have all the pinouts 

Edited by 3VOLUTIONIST, 10 May 2014 - 07:22 AM.

[evo-gsr]

Speed density systems calculate the density of the air first by measuring the temperature of the inlet air and manifold pressure. With the density of air known the engine controller then looks up how much air it expects to be moving at a specific engine speed and manifold pressure. This is done in the Volumetric Efficiency table or VE table. Traditionally the VE table is 3D and has two axes Engine Speed (RPM) and Manifold Pressure or % Load.A engine that is 100% efficient moves exactly its displacement every two rotations in 4-cycle engines.
Advantages
Less restriction in the intake tractMore freedom in the intake tractAble to measure air consumption on very high horsepower builds where a MAF sensor might be limited.Able to read boost if equipped with a greater than 1 Bar map sensorFree from errors encountered in MAF fouling.Works better with large cams where reversion affects reliability.



Disadvantages

Is a little more difficult to tuneRelies on a well tuned Volumetric Efficiency TableLess forgiving to new modifications to the engineMight have errors in large weather changes however a proper tune makes this minimal if any error.



There are several vehicles that come with MAF sensors from the factory and there are several vehicles that come speed density from the factory. Really which fueling strategy you should go with on a aftermarket application is up to your modifications goals and expectations.

Edited by evo-gsr, 10 May 2014 - 07:56 AM.

[evo-gsr]

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[evo-gsr]

Evo 1-3 injectors are 510cc
Evo 4-9 injectors are 560cc

[3VOLUTIONIST]

I'll just be sticking to United's 100 octane for now. So if I get the VI ECU I'll also need the AFM and injectors?

[jack be nimble]

If it is evoscan/ecuflash compatible then you can rescale injectors and afm to what you have.

[rvrftw]

I believe that there is a special version of the maps you have to run if you are using an Evo 1-3 AFM, and that version is limited (I can't remember how, and the forum I got the info from - www.geekmapped.com - is down right now).
Also the biggest hassle will be if you don't run 560cc Evo V-VII injectors. getting this sorted properly in EcuFlash is a right bitch as its not just a case of plugging in the value for the new injectors.

My suggestion would be to run the Evo 6 AFM & 6-8 injectors. A side benefit is that the 6 AFM is round not oval, so pod filters a and piping don't need an adaptor lol

If you go to the Evo oz forums you can get an AFM & injectors easy (I got a 6 AFM & injectors for 200)
I would recommend flashing the tephra mod v7 file onto the ECU to be able to use cool functions like multiple fuel maps (have a low boost map tuned for fuel economy or have a 95ron map in case you are struck somewhere with no 100ron)

Also it is advisable to replace your knock sensor wi the version that came in the ECU's donor car (I.e. Evo 6 knock sensor for Evo 6 ECU, or Evo 8 sensor for 8 ecu).

Also you will need to wire in a OBD2 port.

[HNF]

Evo 1-3 injectors are 510cc
Evo 4-9 injectors are 560cc

 

 

evo 4 injectors are 510cc only the the 5 up changed to a 560cc pink colour i believe it was

 

and the evo 4 injectors had a longer nozzle tip thingy on the bottom correct me if im wrong  

[Missile]

^ the tire kicker is right

[Missile]

A real easy way to do this conversion from the wiring POV is to get a patch loom. You want Apexi part number 4E73G012, which is a patch loom that enables E1-3 to use the Power FC that was developed for the E5-6.

you'll then have to wire in the OBDII connector.

Should make everything plug and play from there.

[evo-gsr]

^ the tire kicker is right

lol..tyre kicker!

[HNF]

lol..tyre kicker!

 

 

tyre kicker 

 

LOL 

[rvrftw]

ok... so I've finally remembered why you should run the evo 6 afm.

The EVO 6 maf can read more airflow and has a higher resolution for that airflow. So in affect, it has better tuning potential. Incidently the wiring is exactly the same, but the plug is different, so you will need to get the female plug as well, and just swap the wires over.