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Rb25det or Rb25det NEO

CarNoob
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CarNoob Apprentice

CarNoob

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Posted (edited)

So I’m looking to get my r33 gts series 2 to 350-400hp and I don’t know which engine  to get. I have the money just not the knowledge. I’ve read countless reviews from 2000s of a 25 vs NEO and the major disadvantage Was that it was hard to find parts for the NEO. Does this still hold true today in 2020?

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GTSBoy Grand Master

GTSBoy

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I don't know that it is harder to get parts for a Neo. What parts? 2nd hand or new? Electronics or pistons?

Skipping past that, on the basis that it not the reason make your choice, the logical points are;

  • The Neo is a better engine.
    • It makes more power stock, because of better head design and slightly better management.
    • It qualified as a low emissions vehicle when it was new, because of those changes.
    • It has solid lifters which makes it better for high revs than the vanilla 25, although they are shim over bucket (unlike the RB26's shim under style) which does make them a little bit more prone to spitting shims if you do stupid things without taking that into account.
    • They have the N1 oil pump stock.
    • They use RB26 rods, which are a little better than vanilla 25s.
    • They are newer, so you are a little more likely to get one in better condition than a 33 motor.
  • The vanilla 25 will be easier to put into the R33. The wiring will be easier to achieve.
    • The Neo has some sensors and connectors and the like that the 33 didn't have. So it is extra stuff that you have to allow for.
    • But.....either way, you're transplanting a different engine in, so you have work to do regardless.
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