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Because if I run an RB25DE ECU, I need to rip apart the dash and swap ALL the wiring over don't I? which will be a kent of a job to do! :D

I'd rather get the loom adapted to the SII RB25DE and leave the R32 RB20DE ECU in.

You will not need to modify the wiring for the dash only the engine loom. I have prepared plug'n'play looms for a number of members of this forum and the most popular is dropping an RB25DET into an R32. I remove unnecessary wiring from the R33 loom and integrate specific wiring from the R32 (eg climate control inlet water temp and fuel pump resistor - not applicable in a non-turbo R32) and more importantly the loom plugs which connect to the R32 body wiring (eg 8pin plug near power steering reservoir and 3 plugs near ECU).

The R33 RB25 has a common power feed to the O2 heater, boost solenoid and VCT. I separate the O2 heater power feed and connect it to the dedicated feed from the R32 loom and then supply separate power for the boost solenoid and VCT by connecting to one of the main loom power feeds.

Hope this helps.

Cheers

  • 2 weeks later...

I did this conversion to a cefiro as couple of years ago.

it is worth while.

my r32 rb25de stock with 21/4 " exhaust made 115 rwkw this made the car very nice to drive .

my previous rb20 de in a skyline made 86rwkw for a comparison. so basically it makes the same power a a stock boost rb20det. we didn't develop the car any further but i feel there was another 10 to 15 rwkw in there with some tuning extractors and cam upgrade. motor dropped in fine no issues stock manual gear box was fine as well.

cheers

meggala

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