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Beer broadens the mind, doesn't it? :)

Ok, say, for example I had a twin spark 16v intake manifold (not the plastic bit, the metal bit) and onto this, fitted 4 individual throttle bodies from a 1.6. An amplifier installed to deal with driving the other three (or all four) and voila, itb Alfa.
Sound feasible?
 

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Balancing drive-by-wire throttles will be very tricky indeed, Each will need its own PWM control circuit based on its own TPS sensor output compared to the desired TPS input signal. It is electronically tricky, but doable. Is the spacing is big enough to fit them side-by-side? Also you need to collect vacuum after the throttles somehow for your brake booster... (the silver bar in the picture)

I had drive-by-cable ITB's on my 2.0TS racer - running stand-alone ECU and basing the fuel injector values on TPS / RPM values.
 

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