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Guys,

Im about to start converting my rb20det cefiro to rb25 and need some opinions on what ecu to use while keeping costs down(if its possible haha)

Mods the motor has are as follows:

2535

480cc injectors

dump pipe, full 3" exh, no cat, cannon :blink:

Motor is internally stock.

Option 1: re-map r33 ecu.

Have been told this is a fairly expensive excercise but I can retain the VCT

Option 2: use rb20det ecu and re-map.

Upside is that it will be a cheap re-map, but then I either lose the VCT or have to run a external oil line of something similar to retain the VCT, If I red correctly.

With this option, maybe I can keep the rb20 loom in the car also, saving me some hassles (if the loom has all the plugs to run a 25)

Option 3: PFC

run the r33 loom and just buy one, 1000 to 1500 for a PFC plus tuning

Option 4: run the stock r33 ecu with a FCD and use the stock injectors

Option 5: get a jap chipped ecu, and maybe this car be re-mappable?

So pritty much need to look at the above oprions, with bang-for-buck being the best.

Feel free to correct me on the above info if its wrong, as Im fairly new to RB series engine

Cheers,

Dan

Edited by works 510
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https://www.sau.com.au/forums/topic/230822-a31-rb25det-convo-ecu-options/
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my car "same as your about to do" has a modded rb20/25 loom running a powerfc... i think if you went one of the other option's to run vct .. is a jaycar external controller... do a search bout the controller... you wont be able to run the rb20 loom on the 25 without stuffing around with it alot....

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