Reds running at 3.2 bar
Wallace uprated actuator
Recent dizzy, arm and leads (rotor arm mod to remove resistor)
Over boost is fine have had it up to 23psi (turned it back down to 20psi). The problem I have is that after dropping to 14/15psi (bar) the boost drops further to 11psi or so. This happens at around 4K rpm, in lower gears you can feel (and see if you are lucky) the boost fluctuate and drop.
My first thought is a misfire however there is no sign of this under over boost? I tried bypassing the amal valve and turned the boost up to about 13psi, no problems. To me it feels like the ECU is messing around with the boost.
Any thoughts or ideas?