BP5A ECU
#1
Senior Member
Thread Starter
iTrader: (4)
Join Date: Feb 2006
Location: Centennial, CO
Posts: 684
Total Cats: 23
BP5A ECU
Out of curiosity, does anyone know if our US cars could swap the BP4W to the BP5A ECU?
I ask because I'm in an OBDII emissions county and know that the BP5A did not have an EGR, so the possibility of finding an ECU that would allow me to delete the EGR and stay legal would be quite convenient.
Thanks!
I ask because I'm in an OBDII emissions county and know that the BP5A did not have an EGR, so the possibility of finding an ECU that would allow me to delete the EGR and stay legal would be quite convenient.
Thanks!
#4
Elite Member
iTrader: (37)
Join Date: Apr 2010
Location: Very NorCal
Posts: 10,441
Total Cats: 1,899
Does the Miata NB ECU even have an internal VIN tag?
I see where you are going with the BP5A ECU. It might be nice to have a factory ECU that's better matched to the hardware... I've got a squaretop and a 5A cam, I wonder if the 4W brain leaves anything on the table compared to the 5A. If you have a source, I might be interested.
Off the top of my head, pinouts may also be different so may not be 100% PnP. Revenant would probably be a good person to ask about this.
I see where you are going with the BP5A ECU. It might be nice to have a factory ECU that's better matched to the hardware... I've got a squaretop and a 5A cam, I wonder if the 4W brain leaves anything on the table compared to the 5A. If you have a source, I might be interested.
Off the top of my head, pinouts may also be different so may not be 100% PnP. Revenant would probably be a good person to ask about this.
#7
Elite Member
iTrader: (37)
Join Date: Apr 2010
Location: Very NorCal
Posts: 10,441
Total Cats: 1,899
I know I've read about the Spec Miata guys swapping around stock ECUs to get an extra 3-4hp here and there on the dyno. I don't know if that's within the deviation on the dyno or some sort of deviation in the ECU itself, or maybe mental damage withing the SM community? Either way, there is somewhat of a precedent for it.
#10
Elite Member
iTrader: (37)
Join Date: Apr 2010
Location: Very NorCal
Posts: 10,441
Total Cats: 1,899
IIRC, I believe the VIN data comes from the state. The first step for the tech is scanning the code (or entering the man readable code for older machines) on the form the DMV sent you. The machine then calls home to Sac and pulls down relevant info, including the VIN. I believe tech then confirms via visual.
But you are right, this is an m.net question fer sure.
But you are right, this is an m.net question fer sure.
#12
BP5A:
BP4Y:
#14
Did any of you buy this one that was up on ebay earlier this month?
Mazda Miata ECU BP5A for 1999 2000 Engine Control Unit | eBay
Mazda Miata ECU BP5A for 1999 2000 Engine Control Unit | eBay