Is the only difference is the faster processor, could one take the fuel chip out of our 8 bit M@ stage 3 ecu or Pettit and install it in the 16 bit ecu? Anyone have any ideas if it's possible?

Tim

 

I wouldn't count on it. There would likely be physical pinout differences and instruction set differences, so an old-style ROM probably couldn't be used on the new chip.

Although, Mazda's term "16-bit" can be vague. It's possible the chip itself didn't change at all. They may have had a slower 16-bit-instruction-capable hybrid chip running 8-bit math routines for faster execution time. Maybe for the newer configuration, they may have simply bumped the clockspeed up and changed the instructions and data-tables (ram/rom size) to work with 16-bit routines.

Obviously, I haven't taken the covers off of either ECU.

I think there were some other external changes to the system as well... like the "blackbox" solenoid chamber?

 

thanks for the reply. Not worth the 100 for the stock JDM ecu then.

Tim

 

Will not work. Loom for 16 bit ECU is wired completely different to earlier models running 8 bit. Had a chance to compare it to a friends when I ripped my 16 bit ECU out.

 

So, what about the PFC for the newer FD's?? Is there any benefit of changing the harness and running the new PFC for the 16 bit ECU replacement?? I have a guy wanting to sell his 16 bit replacement PFC and I was wondering if its worth the change over.

 

I thought that all PFC's were 16-bit anyways.

~Kris

 

they are

Tim

 

Ha.. I didn't know that.. So, I'm assuming there is no difference between new FD PFC and US version FD PFC??

thanks for that info!

Tim, I'll see you on saturday!

PHIL