Can an Evo 9 hex be flashed onto an Evo 8?

Just wondering....Thanks.

 

The car might run, but it would not run well since the VIII doesnt have mivec, has different cams, and different turbo.

 

For why again? I am curious as to why you wanted to do this. I honestly am interested in your idea. It wont work, but I want to know the why.

 

To be honest...I was totally just curious. I was looking at the load parameters on the IX's maps and noticed that they go a little higher than the load parameters on the VIII's maps. I'm sure there is probably a way to rewrite them, but I am not that advanced yet. I also will not be running enough boost anywhere in the near future to truly need higher load parameters than those that exist on the VIII's maps.



Thanks.

 

I believe that the IX ECU has more available memory, so it may not be possible to make it fit.

-Paul

 

Nah it wont work at all. Try flashing an 05 ROM on an 03-04 car and see what happens. They are wired differently and its a no go. As far as your reason, you just need to rescale your load axis to get the same scaling, its really not that hard. Mess around with a ROM that you dont care about.

 

wouldn't work. MIVEC on the IX. also why would you want to do that anyway??

 

summed up, cant work: 9 has twice the memory, additional inputs/outputs, totally different wiring... meaning that a code that drives wire "x" in the 9 will problably drive wire "b" in the 8 ...and if wire "b" is yor MAS... you just fried it.

 

Unfortunately it can't work.. The IX roms are 512k and the VIII roms are 256k..

05 rom's won't run on an 03/04 car, and vice versa.. But If you took an 05 ECU and flashed it with an 03/04 rom, and placed it into an 03/04 it should work and vice versa(though I've never tried it) This is because the physical ECU's are the same, the rom programming changed as functionality was altered.. Otherwise replacing OEM ECU's at the dealership would be a problem.. BUT.. Nobody has tried it yet that I'm aware of..

But not only is the physical ECU different in the IX, the IX is wired differently than an IX, has different connectors, and different memory capacity.