This one hopefully brogue can answer. That is if he is still about. I remember an old thread on rx7club.com where you were tuning your fb with the elford setup. You mentioned you had a 12a turbo dizzy. I am either going to fit one or make my own vacuum pots with the same retard available feature for my elford 12a turbo Viva.
But where to plumb the vacuum lines into? I can\'t just plumb them into the turbo side of the carb as they will only ever see vacuum. I was thinking about plumbing then vacuum line into the inlet manifold so at least they will see boost pressure and hence I get the retard feature that the 12a turbo dizzys feature. But will I see enough vacuum there to get my vac advance required under high load at low revs?
Where is the usual point I should plumb into- or are there two points used with solenoids/ one way valves used. I can imagine the standard Mazda 12a turbo setup was more complicated than what I want going by what few photos of the engine rats nest I have seen.
Any help or ideas appreciated.
The vacuum reference signal requirement is no different to any turbo. My MAP sensor is connected off the manifold.
Seeing vacuum is not the issue, it\'s seeing the actual running conditions - in this case if you are seeing low vacuum under high load/throttle and low revs then it\'s only because the turbo is spooling up and becoming more volumetrically efficient, and subsequently most likely not requiring so much advance.
HTH :)
So off the inlet manifold will still see vacuum and then boost.
Correct. Everything pre throttle plate will be vacuum until it starts to boost at which point you\'ll want the boost retard curve kicking in.