Hey guys picked up a ba ute with bf motor and drive train bout a month ago and m having issues making good power. It has all supporting mods to make easy 350kw but only just pulled 300kw seems that boost cant be increased over 15psi and bleeds back to 12psi it has a eboost street ebc. No matter how much we wound into it on the dyno boost would not increase. Im thinking actuator cant hold the wastegate closed. Any other idears guys any help would be appreciated.

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an electronic controller will not cover any mechanical issues, the factory controller works perfectly when the correct rated actuator is used

Yes I know that however the factory controll is gone and has been replaced with the eboost street by the previous owner. I gather he was trying to fix the same issue. it has stock turbo with stock actuator ive been told the flapper mod has been done. All I can think of is that it hits 15psi n the gate opens cus the stock actuator cant hold any more. And since it does this at 55% on the boost controll and even when wound to 99% nothing changes the actuator has to be the problem. The eboost controlls boost under 15 psi perfect so its working fine

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you have had it on a dyno?

Yer mate dyno ran 301kw boost spike to 15psi n drop to 12psi and wont increase past that. I want it to hold 17 to 20psi right through rev range and make 350+kw wich will b easy if I can sort this boost increase issue.

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Any other idears anyone im thinking if not actuator I may have a cracked rear housing at the wastegate that is leaking my missing boost.

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are you using the stock actuator?

...it has stock turbo with stock actuator ive been told the flapper mod has been done.

Having the port larger on a stock actuator means the actuator has even more force on it at same boost due to the larger flapper having more gas pushing against it.

So u reckon actuator to skids. Ive ordered a turbosmart 12psi to replace stock 1 hope it solves my prob.

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