Max boost on chaser

Thread in 'Technical Questions' started by Mattvaughan180, Jul 2, 2019.

  1. Mattvaughan180

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    Hi just wanted to know what is the max boost to set my chaser up to.
    It’s (obviously) the 1jz vvti gte running standard turbo, front mount, 3inch exhaust from turbo back,320ltr fuel pump,j pipe delete
     
  2. Mrodoc

    Mrodoc Member

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    0.9bar if your using a ebc, and a stock ct15b
     
  3. ShaunV90

    ShaunV90 Active Member

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    0.9 bar is solid advice. You can run more but turbo will sh*t the bed soon enough.
     
  4. Blitz.

    Blitz. Member

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    I believe a little over 0.9 is when the boost cut kicks in anyways so you'd need a fuel cut defender or something like it to go beyond that.
     
  5. Mattvaughan180

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    Cheers guys, am I right in saying there running at 0.8 bar standard? That’s what it says on my boost gauge anyway??
     
  6. mk2glenn

    mk2glenn Member

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    Fuel cut on standard ECU is around 1 bar so 0.9 should be good. Standard boost is lower, I think 0.6 bar but if you have decat & exhaust fitted it's probably running more. With an aftermarket ECU, can run 1.2 bar safe enough although it doesn't have much top end.
     
  7. Mattvaughan180

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    At the minute the car sits with a blitz back box, hpi front mount and a hpi induction kit and the boost gauge reads 0.8 unless the boost gauge reads false it should be that high??Got exhaust/elbow/down pipe to fit soon along with the j pipe delete, boost controller and fuel pump. Was going to get a power run on the dump too what power am I expected to see? 300hp??
     
  8. mk2glenn

    mk2glenn Member

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    Sounds a little bit strong for standard boost but I'm not sure. You should see about 300 with those bits yea.
     
  9. Mattvaughan180

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    That’s what I thought?? Anyone know what boost these run at standard??
     
  10. r3k1355

    r3k1355 Well-Known Member

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    You do sometimes see boost levels rise when you fit induction and exhaust mods.
     
  11. Zammish24

    Zammish24 Member

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    usually run around 7-9 psi of boost, but if you remove the factory downpipe and decat the boost will to spike at 15-17 psi (not good for a factory turbo).

    The wastegate does not freely flow enough for it to be controlled. to fix this toyota fitted a very restrictive downpipe and cat to reduce flow thru the exhaust turbine.
    What I've done is ported the waste gate as much as possible..... and to be honest its worked to some extent but at times i do see spikes at 12-13psi.
    a restrictor plate is a 'bodge' which is why i haven't gone this route but it does work and simple to do.
     
  12. NaZe

    NaZe New Member

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    My run at 1.2 bar with FCD on 102 octane with no issues until the turbo went bad.
     
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