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Thread: z20let boost

  
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    leimancell's Avatar
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    z20let boost

    hi there i have a z20let with an uprated vxr turbo, manifold and actuator and a k&n induction kit and a forge dump valve and main cat taking out with a performance backbox its running standard boost 0.6 bar.
    what can i take it to safely with how the car is, ie as much as i can go with causing any damage and will i be ok to just fit a manual boost controller and away we go done ? cheers lei

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    vxr boost

    22psi on overboost is about ya max on vxr turbo. You will defo need a map and fueling to suit. Anything above about 240bhp and you will need intercooler, vxr maf sensor and vxr injectors.
    439bhp/420 torque (evotune mapped coupe)http://www.astraownersclub.com/vb/showthread.php?t=292718

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    so what can i run the car at at the moment how it is?

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    AdamH-SRi-T's Avatar
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    you can run upto 280bhp without needing the VXR AFM and injectors. a few people on here have done it.

    but you will need a new intercooler if you plan on going over lets say stage 1 power.

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    so what boost can i turn it up to with what mods iv got

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    that what im getting at you cant just turn it up with a manual boost controller, well you can if you dont value having an engine.
    when i was running 1.2 bar mine was making 270bhp, that was regal stage 3.
    439bhp/420 torque (evotune mapped coupe)http://www.astraownersclub.com/vb/showthread.php?t=292718

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    its running 8psi i was gna go about 13-14 mayb

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    my brother had a gsi for 12 months running 15psi with same mods as mine and that was fine but i wanna no ill deffinately be fine

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    It will be as long as you care for your engine by treating it with some respect and as long as the mapping is good.
    Star Silver SRI Turbo..'Red.Dot Reloaded'..Cybox Precat, Cybox Catback SS Exhaust..K&N Panel Filtered...9Ltr EDS SMIC!!.....

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    its standard mapping mate

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