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bore out stock B16 intake manifold?

Discussion in 'Engine Building' started by 12secondCRX, Jul 17, 2003.

  1. 12secondCRX

    12secondCRX Senior Member

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    I was wondering if anyone knows if you can bore out a stock JDM B16a1 intake manifold to fit a 70mm throttle body and if so how much horsepower will it give me. :worthy:
     
  2. Gen2Teg

    Gen2Teg Senior Member

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    why not just buy an ITR or Skunk2 intake manifold?
     
  3. 12secondCRX

    12secondCRX Senior Member

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    If I buy either one of those I'll still have to bore it out to fit the throttle body and this is just going to be my back up motor once I get the rest of my ITR motor done.
     
  4. B16

    B16 Super Moderator VIP

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    i'm sure you're read this line a million times because i know i've stated it at least a million times
    there is no way we can tell you how much HP you'll get from it.
    it really depends on your other mods, sorry just annoys the shit out of me when i see people ask that.
    you can bore out your stock b16 mani, but i woudln't, i would get skunk2 or itr, bore those out, they have better runners.. or if you're going 70mm TB you must have some wicked cams in there, then i'd look at the JG victor X mani, i think that one takes a 70mm tb without boring.
     
  5. 12secondCRX

    12secondCRX Senior Member

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    I'm was going to have them bore out the runners also.
     
  6. B16

    B16 Super Moderator VIP

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    well, you would have to change runner length too, they are pretty long on the B16 mani compared to ITR or aftermarket.
     
  7. 12secondCRX

    12secondCRX Senior Member

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    I was wondering how much of a difference it will be if I go ITR or Skunk over the bored B16?
     
  8. pills_PMD

    pills_PMD Super Moderator

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    you will get more top end from an itr/s2 unit but more midrange from the b16 IM..

    do you drag race it? street it? autoX it??

    that's what it all depends on.
     
  9. 12secondCRX

    12secondCRX Senior Member

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    I drag race and I have nitrous for top end so B16 would help middle.
     
  10. SiRickB

    SiRickB Junior Member

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    yeah but i would recommend the skunk II manifold, you will get the best power out of it, plus the more top end, plus your nitrous and ytou are good to go
     
  11. 12secondCRX

    12secondCRX Senior Member

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    I'm not really looking for top end right now because I have trap speed at 104.8 and that should be high 12,low 13 and I'm running 13.7 so need more towards bottom.
     
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