Hi
I took the car for a rolling road session to get the idle, timing and mixture dialled in. Very happy with the results - a mighty 91 bhp - it's a stock UK car except for K&N filter and one size up on the main and idle jets.
I have swapped the factory Marelli S135 points distributor (no vac advance) with an electronic Marelli SE100CX unit off a later Uno 1.3, which has vacuum advance. My question: where do I get the vacuum signal for the distributor?
I was using the port directly below the primary throttle plate on the 34 DATR carb. The tuner measured the vacuum at this port and found that it sits at 1.5 bar vacuum regardless of the throttle position. He said the vacuum signal for the distributor should drop as the throttle plate opens. As a result, using the SE100CX distributor, I'm getting too much advance, so he has left the vacuum disconnected.
Where is the correct place - the inlet manifold? He was talking about drilling a hole in the side of the carb to pick up a vaccum signal - anyone know if that is possible?
Cheers
Jim
I took the car for a rolling road session to get the idle, timing and mixture dialled in. Very happy with the results - a mighty 91 bhp - it's a stock UK car except for K&N filter and one size up on the main and idle jets.
I have swapped the factory Marelli S135 points distributor (no vac advance) with an electronic Marelli SE100CX unit off a later Uno 1.3, which has vacuum advance. My question: where do I get the vacuum signal for the distributor?
I was using the port directly below the primary throttle plate on the 34 DATR carb. The tuner measured the vacuum at this port and found that it sits at 1.5 bar vacuum regardless of the throttle position. He said the vacuum signal for the distributor should drop as the throttle plate opens. As a result, using the SE100CX distributor, I'm getting too much advance, so he has left the vacuum disconnected.
Where is the correct place - the inlet manifold? He was talking about drilling a hole in the side of the carb to pick up a vaccum signal - anyone know if that is possible?
Cheers
Jim