Originally Posted by
cmulder
What if instead of using a servo have a piston (with a return spring inside the cylinder) move the bleed air valve?
Then use the vacuum from the crankcase (trough a one way valve) to actuate/move this piston.
This assumes that the vacuum inside a engine is directly corrolated to the fuel demand (rpm ect) and therefor regulates on the actual fuel demand of the engine instead of the position of the trottle servo.
thoughts ?
That won't work...
The principle is a bit like that of a "constant velocity" carb, but they work very different than what you describe.
The how and why would probably take me 2 pages to describe, so I won't even try.