RB25DE to RB25DET head comparison

[93RPS13]

what is the difference between the RB25DE head to the RB25DET head? Also If i was to do the RB30/25 hybrid engine conversion without the VVT do i just which the Cam shafts from the RB25DE to the RB25DET? thanks

[Bl4cK32]

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

[Roy]

But what of the RB25 engines that came out in the last of the NA 32s.

I was looking at one of them some time back and it appeared to have an RB20 inlet manifold????????????

[Bl4cK32]

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.

[Skyrine-Dave]

Althought they look the same.. are there different bolt patterns that prevent them from bolting up....

[Bl4cK32]

Don't think they're different. I took the rb20 inlet off my car, and took the r32 rb25 inlet off the rb25 head and im pretty sure they are all in the same position. Dont quote me - I cant be farked trying to put the rb25 manifold on me rb20 head.

[93RPS13]

how much does a RB25DE complete head go for there in australia is AUS money please? thanks

[Bl4cK32]

I got an r32 rb25de head with the inlet manifold, fuel rail, injectors etc for $750 (Australian $$) here in Adelaide.

[Roy]

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;)

[Skyrine-Dave]

Roy that was my plan.. but i am getting told this way and that way that i cant use RB20 parts on the rb25/30, then people say i can. so confusing.

[Bl4cK32]

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.....

[Roy]

So if using the R32 RB25DE head you cant use the Greddy plenum...to me thats half the appeal.

[Bl4cK32]

yeah, you can use any plenum you want. As long as its suited to the car its goin in. I only meant u can get away with using the equipment u got. I was thinkin of goin the front plenum meself.

[Roy]

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???

[Bl4cK32]

What I'm sayin is that the rb25de stud pattern on the head is the same as the rb20 inlet manifold. Therefore if you were goin to fit a front facing plenum, then u would use a plenum built for the rb 20.

[Roy]

Ahhhh... the fog has cleared... thanks

[OoskylineoO]

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!