i made the engine swap without problems, just the dtc: VVT CAM but the mivec works perfect. (cams installed)

the only think that i made with the harnness was the connection plug of the tranny was diferent of the evo 8 mr harneess(USDM) and the evo 9 harneess (ausdm), but the cables colors and everething was the same, so i just cut and put the Pig tail.

but its pretty simple if wanna ses pictures guys look for me in Facebook :Edgardo german and find the Photto album of engine swap.
if have any question im here to help us.

Edgardo...

 

Looks very clean

 

Got mine all done now, dodgy info about the Mivec not working......it's fine, boost solenoid wasn't though! Just needs a map, and I'm free and clear. Felt faster with Mivec and the ix turbo at 17 psi than without them at 28psi, which is what it ran as an viii! Can't wait to see what I've ended up with after the map's done.

 

Is it possible to run the the mivec head swap on the evo 8 ecu temporarily? Hopefully the cam phasing would be locked and allow you to do that. I ask because I hear talk of new e-testing hitting my part of the world soon where the e-test machine will be plugged into the OBD-II port. And seeing a different vin # than the car's actual vin will cause hell.

 

I think the the 8 ecu would lack MIVEC knowledge... so my guess would be you need and evo 9 ecu with mobilizer removed.

 

But would there be an issue in running the rest of the engine without the mivec hooked up? As in just leave the mivec pins disconnected. Will it automatically lock the mivec unit at 0* advance? Or will it be unpredictable?

 

You can run the 8 ecu with the Mivec connected, I did this on mine with no adverse affects, although I did also have the oil feed connected..don't think it makes any difference without this though, as I had the oil feed control valve disconnected while on the 8 ecu. Obviously on the 8 ecu, you will have no Mivec operating, but you won't do it any harm in this situation.

You can also run it on the 9 ecu without Mivec, ran mine with all the sensors for the Mivec disconnected while on the 9 ecu...no harm done.

 

I was hoping this was the case. Cause when my buddy did an STI engine swap (with AVCS) into his wrx he was not able to run the damn thing at all with the wrx ecu. The AVCS really didn't let him.

 

what about when running an after market ecu thats standalone? would you just rely on the ECU to advance and retard timing based on MAP sensor. or do you set it like the Honda guys and have it activate a second map tuned for MIVEC/ VTEC cam/ rpm change?

 

Never tried a standalone, but you can alter the timing of the Mivec ( where it comes in on the rev range ) with some aftermarket ecus....don't know for sure, but I think you can do this with the factory ecu also?

 

that would make more sense to be able to tune what you have than to go buy an aftermarket unit. I am unfamiliar with the stock ecu capabilities (thats why I am new here, I want to learn). so would there be a disadvantage to running without the MIVEC?

 

Why would you consider running without the Mivec if you have the option of having it? The whole purpose of having it ( and the reason I put myself through the aggro of fitting it to an 8 ) is because it makes for a better road car....my impression is that people are just beginning to understand and accept that the factory ecu is capable of giving far more driveability and " normal " day to day useability than was previously thought, compared to aftermarket ecus, which are sometimes troublesome to set up, and can have issues regarding cold start etc.

I'm prepared to concede the last point to more knowledgeable techs, but my experiences with my car as a 9 are more than favourable compared to how it was as an 8.

 

Yeah you can have a mivec motor with a viii ecu. Just no mivec. Mine was like that when I bought it.

Yeah you can alter the mivec on the ems, And watch it live. I had mine up on the graph while logging and its a pretty cool thing to mess with, It gets a little more serious around 5500 when boost starts falling off on the ix turbo in my car, And feels like vtec popped and actually pulls the car harder, Really makes up for the boost falling off. Cant wait to feel it without the boost falling off!

 

u need the wiring harness and ecu off the evo9...

 

Well, mapped today, feels quick enough to have made the chassis worry, peaks at 25 psi.....gave me a shock when it lost all boost while overtaking some stuff, it blew the bung out that I used to block off the unused egc pipe.

So far so good, speed density next.