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914World.com _ 914World Garage _ Neat throttle linkage...dual carbs/individual TB's

Posted by: Mueller May 20 2005, 12:14 PM

Found this on the TWM throttle body website....

not only is it for the linkage, it also doubles up as a common manifold for MAP readings for fuel injection....

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Posted by: Aaron Cox May 20 2005, 12:48 PM

just a bell crank linkage... WITH GOODIES
im sure you could make it mike

read something about, how they arent so greeat on a horiz. opposed aircooled motor, because of the expansion of the motor....

thats why most hex bar setups 'self center' themselves with springs on each end

Posted by: Mueller May 20 2005, 01:13 PM

i figure the expansion of the motor would play games with it...Jake mentioned figures of .010 to .030 for a superheated motor....

Posted by: SirAndy May 20 2005, 01:21 PM

another problem with this setup, the movement of the throttle blades won't be linear!
in fact, it'll be a copped off SIN Curve ...

i'm not sure what that does to your rpm/hp/torque graph ...
Andy

Posted by: Aaron Cox May 20 2005, 01:23 PM

it would play games with your head

1" of pedal is 30% throttle, but 1.5" is 80 percent for a crude example

Posted by: Mueller May 20 2005, 01:24 PM

QUOTE (SirAndy @ May 20 2005, 12:21 PM)
another problem with this setup, the movement of the throttle blades won't be linear!
in fact, it'll be a copped off SIN Curve ...

i'm not sure what that does to your rpm/hp/torque graph ...
Andy

an oblong or cam shaped wheel could be used instead

Posted by: maf914 May 20 2005, 01:40 PM

Or increase the diameter of the wheel and locate the two linkage arms at the sides as opposed to the top and bottom as shown so that movement will be at near right angles or tangent to the wheel. The same problem occurs with the typical cross bar linkage and the solution or compromise is the same.

Posted by: jhadler May 20 2005, 06:10 PM

Hey Mike (and anyone else interested)...

Have you bought the throttles yet? If so, where from? If not, I found a source of TWM throttles that is WAAAY cheaper than TWM directly. Just ordered a set of 45's this week...

The pony car shops are always the place to look for cheap go-fast parts...

-Josh2

Posted by: Mueller May 20 2005, 06:16 PM

QUOTE (jhadler @ May 20 2005, 05:10 PM)
Have you bought the throttles yet? If so, where from?

yep....paid $125 for mine, they include the injectors and the TPS

of course they won't "bolt" right on without a little bit of work:
(1200 Ninja throttle bodies)

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