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Old 06-16-2013, 11:19 AM   #1
leforce
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Default GC8 to GDB ECU swap

I need to tune a JDM GC8 STi so the basic idea is to swap the ECU & install a 01-03 JDM 16bit STi ECU.

First, I need to know which pins that need to be swapped

I'm assuming that I'd need to swap injectors, MAF, map sensor, IAT sensor as well.
Another option would be to insert the correct latency & scaling values for the GC8 injectors & MAF in the rom, I wonder if anyone here has those values.

I'm sure that such ecu swap has been done before, I wonder what are all the correct steps to perform such swap?
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Old 10-02-2013, 03:50 AM   #2
ozmojo1
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I am buying a GC8 and just realizing I can't tune the ECU myself! Crap!

Has anyone done the swap the poster mentioned?

Thanks, Rory
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Old 10-02-2013, 04:50 AM   #3
WReXd
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The easiest way to tune the car would be to install a piggyback like emanage or a standalone like AEM.

If you want to use a GD ECU it's going to be a LOT of work. You'll basically be doing all the work to swap in a GD engine as well: the engine harness, along with accompanying sensors, coil packs, throttle body, probably manifold... all of these will have to be swapped.
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Old 10-02-2013, 05:20 AM   #4
ozmojo1
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Jesus. I am coming from an EVO 4 that required nothing to plug in a newer gen ECU that is mappable with Ecuflash.

Why would coil packs, throttle body and manifold be required? With the GD ecu just change the parameters to compensate ahead of time in a safe rom and tune from there. No?

Thinking along the lines of an EVO, to put a much newer ecu into my 4 it would require the pins being swapped here and there on the ecu harness. Much easier than changing a whole harness! Why couldn't that be done?
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Old 10-04-2013, 11:05 AM   #5
leforce
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After I posted the same question on RR forum & I found that all the parts that WReXd mentioned are needed & indeed the intake manifold too! So, the project is put off until I could find/purchase all the required parts. I think it would still cost less than a standalone ECU.
With an Evo4, if you install a 5/6 ECU then you don't have to swap any pins!
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Old 10-04-2013, 11:05 AM   #6
leforce
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After I posted the same question on RR forum & I found that all the parts that WReXd mentioned are needed & indeed the intake manifold too! So, the project is put off until I could find/purchase all the required parts. I think it would still cost less than a standalone ECU.
With an Evo4, if you install a 5/6 ECU then you don't have to swap any pins!
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Old 10-06-2013, 09:29 PM   #7
ozmojo1
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Quote:
Originally Posted by leforce View Post
After I posted the same question on RR forum & I found that all the parts that WReXd mentioned are needed & indeed the intake manifold too! So, the project is put off until I could find/purchase all the required parts. I think it would still cost less than a standalone ECU.
With an Evo4, if you install a 5/6 ECU then you don't have to swap any pins!
Yup, I know about the 5/6ecu (did it recently) but with 7/8 ECUs the pins need to be swapped around. My point is why couldn't that be done with a GC8 and a GD ECU? Then tune the GD ecu with a GC8 map?

As for swapping parts it looks like it would cost me maybe $500 to get all the parts. It would be nice to know exactly was what is needed though. I am still surprised there is no information on this regarding how popular the GC8 is.
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