2000 non-linear throttle set up ?

jp928

Well-Known Member
#1
I am trying to recall how the 2000 (certainly the TC, not sure of SC?) achieved its non-linear throttle response - the shape of the curve in the countershaft plate that engaged with the other shaft. Does any have a pic of the set up please, showing the two shafts please?
thanks
 

Demetris

Well-Known Member
#2
This is a photo of the HS8 set up. Unfortunately you can't see all the details.
1609158512253.jpeg

1609158840916.jpeg

On the HIF setup, the cable pulls on a snail cam.

1609158946352.jpeg

1609158971610.jpeg
 

jp928

Well-Known Member
#3
Thanks. Is the snail cam the shape of an arc centered on the shaft (linear(, or some sort of spiral shape (non-linear)?
 

roverp480

Active Member
#6
The butterfly opening is by its nature none linear in relation to air flow. 5 degree opening from idle makes a huge difference in the throttle area whereas 80 to 90 degrees make hardly any difference at all . The pedal movement is therefor initially arranged to give much less butterfly opening relative to its movement from idle than it does near the top end. Makes it easier to drive.
 
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