you might be best taking it to have a good tune/set-up at a good company or give one a call at least if there any good the will try and point you in the right direction.

do you know what the actuator was set to?

but if you unplug amal valve and it will give you half the boost.

what pipe did you us for the amal valve, because if the inside diameter is to small this will cause it to over boost.

and has it got the correct jets in the amal valve as this will all so cause it to over boost.

hope this helps in some way pal