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High boost (~28psi) with -5s/2530s. what actuator needed for stable boost? Hi Guys, Got a question for those of you that have pushed big boost through low mounts (-5s/2530s etc) I was using some dual port actuators from turbonetics with a 4 port solenoid in the hope they would provide a large control range for boost control, but they leak on the underside of the diaphram through the shaft hole so cannot hold the wastegate closed at significant boost and they also have a weak spring so are not suitable to just use as a single port. on closer inspection they're not going to work so I'm ditching them for some normal single port actuator cans. the question is, what spring pressure will I need to use to hold 28psi on E85? is the 15.6psi spring of the garrett -5 actuators enough to not have them blow open at high exhaust manifold pressures or do I need to go to a garrett 19psi spring actuator to hold them? it is a flex fuel car so on 98 I would like to be running around 20-22psi and up to 28-ish psi on E85 if possible. the other option would be going to dual port turbosmart IWG-75s but they're quite a bit more expensive so would rather not and I'm not sure if they'll fit as they're pretty big. thanks!