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read -Joel- 's rb30 diy guide. It explains the answers. Why would you want to swap the 25de cams for the 25det cams? I've been told they are more aggressive (de) than the turbo (25det) cams. Apparently 25de cams slightly lump when put into a turbo engine

the rb25's in the last r32's had no VVT. This makes them perfect to use in the rb30/25 hybrid conversion if you dont want hassles of trying to connect it all up. -Joel- has compared the inlet manifold from the rb25de motor, that came with his head, and yes - it does look exactly the same as the rb20 inlet manifold.

My pride wont let me put an RB25 or RB30 in my car, i want to fly the RB20 flag:(

If i could use the RB20 looking manifold off the 32 RB25 then at least i could cheat by using RB20 rocker covers and claim that an RB20 can produce all this power and torque;)

yes you can. The inlet manifold, the exhaust manifold, everything bolts up. The only thing changed in this conversion in an r32 need be 1) the r32 rb25de head. 2) the series 2 rb30 block. EVERYTHING else is RB20. The waterpump, oilpump, gearbox, computer, injectors, etc. Even the cover over the coils that says NISSAN 24 valve.....

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But if the R32 RB25DE inlet manifold stud pattern is the same as the RB20DETs, then this means the Greddy RB25DET Inlet Plenum wont match up as the flange/bolt patterns (not to mention water galleries etc) are different from R32 RB20DET to R33 RB25DET.

Is this right???

  • 7 years later...

sorry to dig up a prehistoric thread lmao, save myself from opening another thread,slightly off topic and question is, has any1 put rb25de cams into an rb25det?, what would be involved and is it worth while? providing both rb25s have vct (r33 s2) any feedback would be great thanks!

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