New intake system, Made by Mario at the dub shop Options

[Henshe]

Mario, of the dub shop (thedubshop.net) fabed up an awesome intake for the 914. It looks great and now I can even hear the Tangerine Racing exhaust over the itb's. (IMG:style_emoticons/default/piratenanner.gif)

[Darren C]

Interesting centre linkage you have there Edwin.

If the crank arms are at 45 degrees like standard twin carbs, you have your centre twin arm crank set up incorrectly.

(IMG:http://www.914world.com/bbs2/uploads_offsite/i265.photobucket.com-18255-1455027470.1.jpg)

I see this quite a lot, even with the dreadful cross bar linkages. Throttle cable movement when transmitted through a crank unless set right will give you an exponential throttle opening.

Hopefully my sketch shows what I mean. since the main crank point (where the throttle arms attach, scribe an arc; once they pass over the crest of any arc lateral movement is compromised by side movement, giving a disproportionate throttle opening in comparison to gas pedal depression).
Perfect proportional throttle is achieved if the centre main pivot has arms the same length as the carbs or throttle bodies; and the throttle cable bell crank arm length is calculated at a 90 degree rotational pull arc, based on linear cable pull.

[ChrisFoley]

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Throttle cable movement when transmitted through a crank unless set right will give you an exponential throttle opening.
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A cable wrapped around a pulley has linear throttle response. Just sayin' (IMG:style_emoticons/default/biggrin.gif)

[0396]

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Throttle cable movement when transmitted through a crank unless set right will give you an exponential throttle opening.
...

A cable wrapped around a pulley has linear throttle response. Just sayin' (IMG:style_emoticons/default/biggrin.gif)

Chris,

Very logical, takes me back to my physics days.
You Da Man.