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Thread: actuator on VXR turbo, help please???

  
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    phil-boyGSi's Avatar
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    actuator on VXR turbo, help please???

    Hi guys, (and gals)

    actuator on the z20let unit had about 3 threads showing at the bottom,
    new vxr unit has more than that, (5 or 6, maybe more).
    anyone know if i should change this or will it be fine?
    (fitting it to my standard GSi)

    thanks
    *!Arden Blue GSi!*
    he came, he saw, HE CONQUERED

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    DiscoFred's Avatar
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    I have about 3. This shows you how to zero it...

    http://www.astraownersclub.com/vb/sh...62&postcount=2

    Gratuitous post steal

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    so what would happen if i hadn't done that, and kept it as it would be set-up on a vxr?
    would it cause any probs?
    (already fitted it...)
    *!Arden Blue GSi!*
    he came, he saw, HE CONQUERED

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    thrifty's Avatar
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    probably send the car into limp and then won't give you any boost. On the motor way in higher gears.

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    z16xe's Avatar
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    the vxr actuator is set different to a normal z20let one because the boost is higher on the vxr approx 10psi, a standard astra gsi is preset to around 7-8psi boost, if you was to bolt a vxr turbo straight on it will play havock with your ecu and worst case senario will be a trip to vauxhall to get your ecu reset as it will go into limp mode what you normal find is that most people set there actuator so that there is 5mm of thread from the locking nut on the actuator to the end of the actuator rod then set it in place with a bit of locktite

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    Quote Originally Posted by z16xe View Post
    the vxr actuator is set different to a normal z20let one because the boost is higher on the vxr approx 10psi, a standard astra gsi is preset to around 7-8psi boost, if you was to bolt a vxr turbo straight on it will play havock with your ecu and worst case senario will be a trip to vauxhall to get your ecu reset as it will go into limp mode what you normal find is that most people set there actuator so that there is 5mm of thread from the locking nut on the actuator to the end of the actuator rod then set it in place with a bit of locktite

    Never known anyone loctite the nuts so no idea where that came from - its a locking nut and the simple physics of both nuts tightened is more than enough for most ppl

    as for the ECU entering limp mode etc - this isnt 100% the case - some ppl report problems but equally just as many ppl had no issues with it set too high

    mine was set in the vxr position for 25k miles (heatshield in way so never really noticed) no limp mode or anything and im not the only one



    just reset it as linked to earlier in the thread and u shouldnt encounter any problems

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    the locktight is just a precaution so the nut doesnt vibrate loose thats all and as shown in the link above you can clearly see the locktight on the thread from the previously set actuator not so long ago in total vauxhall it shows you how to put a vxr turbo onto a mk4 might be worth a read quite handy

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