Acceleration pedal

[InfernalVortex]

Originally Posted by Spectre

Sportier engines do not have two throttle butterflies (with the second opening after the first) unless they've got one of the various "variable length intake tract" schemes.

This is common with 4-barrel carburetors, perhaps that's what he meant?

[NooDle]

hmm, I didn't know that most cars were governed by electronics, I'm still thinking the pedal is connected to the engine, where pushing it down means more fuel, which means go faster

I must admit that in my car the pedal feel is very gradual, up to about 90%, after that it's the same as going flatout...

[bone]

Originally Posted by NooDle

hmm, I didn't know that most cars were governed by electronics, I'm still thinking the pedal is connected to the engine, where pushing it down means more fuel, which means go faster

I must admit that in my car the pedal feel is very gradual, up to about 90%, after that it's the same as going flatout...

from the moment you have cruise control, ESP and/or traction control, it will most likely be throttle-by-wire

[NooDle]

boo! I have all of the above, so I'm flying by wire

[Spectre]

Originally Posted by InfernalVortex

This is common with 4-barrel carburetors, perhaps that's what he meant?

No, see upthread - he's got a dual butterfly throttlebody for EFI.

Originally Posted by bone

from the moment you have cruise control, ESP and/or traction control, it will most likely be throttle-by-wire

Not so. Cruise control is traditionally accomplished by either a bellows or a servo pulling a cable connected to the throttle body. ESP/traction control is usually accomplished (until the last couple of years, and even still to this day on non-luxury models) by engagement of the ABS, pulling timing back on or cutting out the ignition entirely, or by pulling/cutting fuel injected to the engine.

None of these flat out require throttle-by-wire. My XJR has all the above and the throttle is still manual. (For which I am grateful, as the early TBW units were in fact crap - my 92 E32 was a perfect example of that.)

Originally Posted by NooDle

boo! I have all of the above, so I'm flying by wire

Diesels do not have throttle bodies anyway. Diesels run by controlling the amount of fuel going to the cylinders, not by controlling the amount of air.