New 2 z Posted June 1, 2011 Share Posted June 1, 2011 (edited) my Z wont go past 11psi almost like a safe guard. I removed the pop off valve and capped it so thats not it. I have a internal wastegate with a boost controller. the turbo is upgraded it is not original. when i floor it from a stop it hit 15 psi, sometimes 20psi and then drops to 11 psi. anyone have any ideas? Edited June 1, 2011 by New 2 z Quote Link to comment Share on other sites More sharing options...
New 2 z Posted June 2, 2011 Author Share Posted June 2, 2011 hello? no one on this site knows what it could be? Quote Link to comment Share on other sites More sharing options...
NewZed Posted June 2, 2011 Share Posted June 2, 2011 You have a boost control problem but did not say much about your boost controller. Some information on the "turbo upgrade" might also help. Quote Link to comment Share on other sites More sharing options...
New 2 z Posted June 3, 2011 Author Share Posted June 3, 2011 You have a boost control problem but did not say much about your boost controller. Some information on the "turbo upgrade" might also help. it's the Stock nissan garret T3 turbine section and a upgraded .60 trim Garrett T04E compressor wheel/housing. the engine has seen 15+ psi before so I doubt it's a gasket somewhere. boost controller was a DIY built spring and ball. i max it out ALL the way where the spring is forced onto the ball and nothing. Quote Link to comment Share on other sites More sharing options...
Quin Posted September 16, 2011 Share Posted September 16, 2011 I'd say either your homemade mbc crapped out or you have a boost leak somewhere. Quote Link to comment Share on other sites More sharing options...
HowlerMonkey Posted September 18, 2011 Share Posted September 18, 2011 This happens when your wastegate is still getting it's boost reference from the turbo or before the intercooler. Try moving the line to the intake manifold. Quote Link to comment Share on other sites More sharing options...
stprasinz Posted September 22, 2011 Share Posted September 22, 2011 loose flapper, external spring to create tension on the flapper (where the actuator attaches to the turbo). boost leak.. I can run about 6 psi with my piping entirely disconected, and about a 1/2" gap.. How is amazing lol.... Quote Link to comment Share on other sites More sharing options...
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