na performance, rb25 - rb30

Discussion in 'Technical' started by e-z, May 9, 2011.

  1. e-z

    e-z New Member

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    Hey guys I know this isn't zed related but I need your opinions,
    Now I'm building a cheap na r31 to drift. I have turbo car so yes it will stay na. I wanna make it fun,
    Any who my plans are one of 2 engines and mods now money isnt a big issue but if one will only make slight more power then the other I will go the cheaper option.
    Option 1
    Rb30, big high revving cam and springs, shaved head, rb26 plenum and itbs, extractors,

    Option 2
    Rb25de, stock cams, extractors, rb26 plenum and itbs,

    Both will probably get a water injection kit and alot of advanced timing, or WOT nos.
    Thoughts
    Ryan.
     
    e-z, May 9, 2011
    #1
  2. e-z

    e-z New Member

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    Ps I know gtr plenum won't just fit :)
     
    e-z, May 9, 2011
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  3. Chrispy

    Chrispy Pretentious Upstart

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    Rb30 stroke is too long for proper revs IMO.

    What's wrong with a RB30ET?

    Or chuck a 25 head on the 30 ;) Seen the build on SAU from a while ago? 26 head, built 30, super nice extractors. Looks like he dumped $15k on it. Made 160rwkw :p
     
    Chrispy, May 9, 2011
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  4. Madcow

    Madcow Active Member

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    rb30 bottom with a 25 head.

    there is a bit of fiddeling around with the timing belt. but it is possable.


    mate did it on his R33 with a big chinese turbo. was very fast. until the turbo shat itself.


    and get the gtr inlet or a copy.
     
    Madcow, May 9, 2011
    #4
  5. e-z

    e-z New Member

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    I've built a 25/30 before ;) this is just fun, a 25de will sound cool, I think I'm leaning on the 30, don't want a turbo ( yet ) my mate has a 30e+t in his r32 making 420hp lol
    I'm just torn between the 2, if I Go 30 it's straight in, no wiring etc so I'll prob go that way. Then turbo it after a while. Plus my mrs is going to learn to Drive hard in it so na will be safer for a while
     
    e-z, May 9, 2011
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  6. SRB-2NV

    SRB-2NV #TEAMROB

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    RB30 will be cheaper, both motors will struggle to make over 110rwkw in any case.
     
    SRB-2NV, May 9, 2011
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  7. whoppersandwich

    whoppersandwich Le Canon De Douche

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    ls2/VH45???
     
    whoppersandwich, May 9, 2011
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  8. Chrispy

    Chrispy Pretentious Upstart

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    Hehe! They fit in skylines REAL well :D
     
    Chrispy, May 9, 2011
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  9. e-z

    e-z New Member

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    Hehe I know the power figures, but obviously they have different characteristics in the way they perform.
    Lol do not want v8
     
    e-z, May 9, 2011
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  10. mholt

    mholt Member

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    do like in my skyline
     
    mholt, May 9, 2011
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  11. e-z

    e-z New Member

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    Lol, I don't won't turbo or to build an engine
     
    e-z, May 9, 2011
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  12. Big_al_TT92ZX

    Big_al_TT92ZX Tempted to own another Z

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    Why not, they're better in every sense.
    An RB without a Turbo is crap.
     
    Big_al_TT92ZX, May 9, 2011
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  13. e-z

    e-z New Member

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    Have you read my op?
    Rb bolts in, both options are cheap, I dont want turbo because I wanna build a cool little na car.
    I have a 300+ hp turbo car and want a litle archy car I can teach my mrs to drive in
     
    e-z, May 9, 2011
    #13

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