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celicamad
Forums Junkie

Location:
newcastle
Registered:
June 2002

Re: Found Flow Limit on 1JZ Turbos	Wed, 27 August 2003 12:40

even running factory boost the spool up time will increase slightly .however the boost controller will only bring the boost on as fast as the turbo can make it .so the actual rpm that you begin to make boost will barely chnage however the boost will come on FAST (depending how you adjust the controller) In the case of the hybrids youll probably find that with the size of the wastegate that a certain minimum boost will be achived .this will depend on the turbo mods .But im not surprised that boost is much higher than stock in your case if your running no controller at all and boost is higher than you want then yes improving wastegate flow is the only way to remove more boost (well the best way). i would remove the boost cut and see how much its making .it may only try to make 16 psi but a lot of aftermarket boost controls are designed to handle VERY small flow rates and can only control boost to a given flow rate (in cfm) the boost will begin to rise . a controller must bleed air of but still be able to maintain a stable pressure supply to the wastegate actuator .some valves actually lock open after a given flow rate therfore allowing boost to continue to rise .The valves i used are designed to flow up to 1000 cfm (through an 8mm tube).and are specifically calibrated to handle 0-2 bar for example some people fit a controller and boost already rises a few PSI (bad sign) the controller should be able to keep boost the same as stock. the best sign a controller isnt doing its job is different boost under diffferent load conditions eg up a hill [Report message to a moderator]

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