Twin 40-s wth 34mm chks, toosmall for 9a?

Discussion in 'Throttle bodies & non-OEM ECUs' started by sambo, Jul 14, 2005.

  1. sambo Paid Member Paid Member

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    Got a chance to get a set of above, are they to small for tuned 9a or will they work ok?
     
  2. greg s Forum Member

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    Will give monster torque. Great for road use but not what you'd want for a
    race engine. I've got a relatively standard (KR cams, cast exhaust
    manifold, 2.25" Jetex system) 9A running Dellortos with 32mm chokes:

    <a href="http://img.photobucket.com/albums/v521/gs3333/rr.jpg" target="_blank">Power
    plot</a>

    You can also fit 36mm chokes obviously. Ideally you'd have 45mm carbs
    for 36mm chokes but it's possible and may be better depending on what
    the engine's to be used for. Bear in mind that chasing high peak power
    figures is where a lot of the negative aspects of carbs come in (poor
    driveability and fuel economy).
    Edited by: greg s
     
  3. velly_16v_cab

    velly_16v_cab Forum Junkie

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    i ran 36mm twin 40's on a 1.8 16v, got 168bhp, 140lb

    very torquey but need more top end [:s]
     
  4. sambo Paid Member Paid Member

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    sounds promising! :p

    I have got itb-s set up to go on it but cost of mapping allone is greater than price of carbs and all bits to runn em!

    And i just love rawness of carbs and all the tinkering required :lol:

    Oh yea and simplicity. Would my piper 264-s cams be ok to go with em?
     

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