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Best throttle body sice and which factory

Discussion in 'Engine Building' started by krystianitr, Mar 11, 2005.

  1. krystianitr

    krystianitr Junior Member

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    Which Size Throttle body the best for my set up???:For ITR
    JE 81.5 mm Pistons CR 12.5:1 b18c1 (CR--> 12.2-12.3 for itr)
    Camshaft skunk 2 stage 2
    RC Engineering Injectors 310cc
    AEM cam gears
    Skunk2 Valve Springs & Titanium Retainers Type R
    -cam gears AEM
    -AEBS Typhoon Intake Manifold
    -AEM CAI
    -B # M Fuel Pressure Regulator
    -Headers DC sport and exhaust supersprint
    Apexi VAFC II
    Hondata s100
    I think 68mm or 70mm ,which will be better sice for ITR and factory which is good spoon,BBK,,Erick,STR,RPM??
    THX
     
  2. xj0hnx

    xj0hnx I wanna be sedated VIP

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    With your IM matched, you could get away with 70mm in that set up.
     
  3. krystianitr

    krystianitr Junior Member

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    But which factory do TB 70-68 bore inside!??
    My IM Aebs have bore 65 but I imperf bore for my TB
     
  4. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    65mm or 68mm I don't think you need the 70mm.
     
  5. krystianitr

    krystianitr Junior Member

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    65-68 inside???
     
  6. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    Yes 65mm or you can go a little bigger and get the 68mm but I don't think you will need the 70mm.
     
  7. nfn15037

    nfn15037 Senior Member

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    Way OT here, but dump the VAFC, there is no need for it with Hondata.
     
  8. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    Why not can't you adjust when the VTEC kicks in on the VAFC? I don't believe the Hondata can do that.
     
  9. SixtySecondAssassin

    SixtySecondAssassin Senior Member

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    what are you guys baseing all these tb sizes on?
     
  10. pills_PMD

    pills_PMD Super Moderator

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    the vafc allows easy change of when VTEC will activate, the hondata you have to either rewrite the chip or use the stupid push button thing.

    but who changes their engagement point anyways?? set it once, on a dyno and don't touch it anymore
     
  11. krystianitr

    krystianitr Junior Member

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    Apexi Vafc I need because If I start engine I have too much fuel for small RPM

    And vtec I need start at 6200 Now I have 5500:(
     
  12. AllMotorMonster

    AllMotorMonster Senior Member

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    And you think that changing VTEC will give you LESS fuel during startup?

    If you have the hondata system, then it should be tuned to the engine. It sounds like you either have NOT had it tuned, or your tuner sucks.

    Either way, you don't need the VAFC as mentioned before.
     
  13. krystianitr

    krystianitr Junior Member

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    I need vafc because I must change high vtec about start at 6200 I have now 5500

    What give me hondata s100 for my modification???
     
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