Drive-by-wire for dual carbs/throttle bodies???, would you run them?? |
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Drive-by-wire for dual carbs/throttle bodies???, would you run them?? |
Mueller |
Feb 28 2006, 03:42 PM
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#21
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
A lot of newer cars do not have the traditional cable that goes from the gas pedal to the throttle body...instead the pedal has a potentiometer*, this in wired to the ECU which tells the throttle body how much to open, just because you have your foot buried to the floor, the throttle body might only be open 50% since the ECU is dictating what is going on.
Now a drive-by-wire throttle body could be wired directly to the pot. on the gas pedal to be 1:1 at all times......with a setup like this on dual carbs or individual throttle bodies, no need to worry about thermal expansion of motor and how that effects the linkage. * (similar to a variable resitor which varies the voltage output depending on foot placement) |
bondo |
Feb 28 2006, 05:59 PM
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#22
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
Electric cars use this setup all the time, as they pretty much have to. They make somewhat hardened "pot boxes" that are set up for a linkage, and they even make fully self contained pedals with the pot inside.
Most have a redundant microswitch that can be set up to cut off main power if the pedal is all the way up as a safety feature. Perhaps you could wire this up to a backup system that would cut the fuel pump power if it sensed low vacuum (open throttle) at the same time as sensing your foot off the pedal (microswitch). |
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