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Kpro v4 02-04 RSX ECU...boost control?

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Old Sep 12, 2025 | 03:25 PM
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Default Kpro v4 02-04 RSX ECU...boost control?

Hey everyone. I'm swapping a K24 into a 05 Mini Cooper and I'm now looking into my ECU choices. The harness I have is based off of an 02-04 RSX, so I know I'll need a Kpro ECU for one of those. However, one thing I am stumped on is should I choose a PPA, PND, PNF, or PRB for my swap if I plan on going turbo in the future? Does it not matter? I was looking at the hybrid racing website and it mentioned something about the PRB having boost control within Hondata. Does that mean the other versions (PPA, PND, PNF) don't support boost control and I have to get the PRB?

Thanks for any insight. Also as a side note, if anyone knows a place I can get the ECU for cheaper than Hybrid Racing that would be much appreciated.
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Old Sep 12, 2025 | 08:39 PM
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Default Re: Kpro v4 02-04 RSX ECU...boost control?

If you are using a 5-speed transmission, you can use any of the above mentioned ECU's. If, however, you intend to use a 6-speed transmission... the PRB ECU natively has the circuit pathway to activate the reverse lock-out solenoid on the transmission so that one cannot accidentally shift the car into reverse while moving forward at speed. The PND ECU has an intake runner control circuit that can be re-purposed to control the reverse lock-out solenoid, but some wiring has to be altered in the engine harness to correct the function.

The other two ECU's have no provision to actuate the reverse lock-out solenoid on a 6-speed transmission. As for boost control: ALL ECU versions mentioned can be utilized to operate an electronic boost control solenoid.
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Old Sep 12, 2025 | 08:42 PM
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Default Re: Kpro v4 02-04 RSX ECU...boost control?

Originally Posted by JRCivic1
If you are using a 5-speed transmission, you can use any of the above mentioned ECU's. If, however, you intend to use a 6-speed transmission... the PRB ECU natively has the circuit pathway to activate the reverse lock-out solenoid on the transmission so that one cannot accidentally shift the car into reverse while moving forward at speed. The PND ECU has an intake runner control circuit that can be re-purposed to control the reverse lock-out solenoid, but some wiring has to be altered in the engine harness to correct the function.

The other two ECU's have no provision to actuate the reverse lock-out solenoid on a 6-speed transmission. As for boost control: ALL ECU versions mentioned can be utilized to operate an electronic boost control solenoid.
Great, thank you for the info! I’ll be using a base RSX 5 speed. Good to hear that all ECU versions can be utilized for use of EBC. Is there a preferred vendor most folks here use to purchase a Kpro? Just shopping around so not sure who is legit and who should be avoided when it comes to a vendor to purchase from.
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Old Sep 13, 2025 | 10:05 AM
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Default Re: Kpro v4 02-04 RSX ECU...boost control?

Anyone on their dealer list is a safe bet.
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Old Sep 13, 2025 | 05:45 PM
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Default Re: Kpro v4 02-04 RSX ECU...boost control?

Originally Posted by spAdam
Anyone on their dealer list is a safe bet.
Cool thanks, I missed that on their site, just found it so I'll check it out.
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