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  1. #1
    OpelAus Participant AllenR's Avatar
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    I just want to lower the rear of my Astra TS SRi Turbo

    Hi guys has anyone just lowered the rear of their Astra TS Sri Turbo
    The front is low enough, but the back sits up in the air and the car looks like it has a nose down attitude and would look much better about 30mm lower in the rear.
    Can anyone highlight any issues or suggestions, if suitable lower rear springs were dropped in?
    Click here to enlarge Warning: This is an Old Thread
    This discussion is older than 120 days. information contained in it may no longer be current . Please think of the children before resurrecting this ancient thread!

  2. #2
    OpelAus Enthusiast Shadow110's Avatar
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    Spring rates would be off but if you want to just lower the rear most places will sell just the rear.
    Pedders, eibach, lovells... choice is yours Click here to enlarge

    Sent from my GT-I9505 using Tapatalk
    "treading on the throttle pedal gives you some idea of what it might be like to blow yourself up"
    hippopotomonstrosesquippedaliophobia: fear of long words...
    2003 Astra G Sri-T (very blaack)

  3. #3
    OpelAus Participant AllenR's Avatar
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    Click here to enlarge Originally Posted by Shadow110 Click here to enlarge
    Spring rates would be off but if you want to just lower the rear most places will sell just the rear.
    Pedders, eibach, lovells... choice is yours Click here to enlarge

    Sent from my GT-I9505 using Tapatalk
    Thanks. I can't tell if the rear springs are original. They have "JP" written on them.
    Front spoiler clearance is 13cm and from the top of the front wheel arch to the ground 61.5 cm.
    The rear clearance is 19cm, with 64 cm from the top of the wheel arch to the ground.
    Not as bad as it looks.

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  5. #5
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    By lowering the rear only you are changing the balance of the car. It will result in the increase of under steering, hardly the effect you want in a front wheel car. also the air flow under the car in high speed starts lifting the car off the road thus reducing grip.
    WRC cars adjust suspension height by millimetres to get the right balance and they can have 300mm clearance.

    Don't mess with it.

  6. #6
    OpelAus King Dingaling guy 27's Avatar
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    think bunnings have a sale on angle grinders this weekend.
    04 Astra Sri - Silver - Full red leather interior - mk4 888 wheels - Star light roof lining - lowered - ice - exhaust - vxr brakes - quite a few other things.
    my ride - no longer faster than qlds sri-t's
    OEM+
    04 Astra Linea Rossa - Build thread


  7. #7
    OpelAus Participant AllenR's Avatar
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    Click here to enlarge Originally Posted by vekara Click here to enlarge
    By lowering the rear only you are changing the balance of the car. It will result in the increase of under steering, hardly the effect you want in a front wheel car. also the air flow under the car in high speed starts lifting the car off the road thus reducing grip.
    WRC cars adjust suspension height by millimetres to get the right balance and they can have 300mm clearance.

    Don't mess with it.
    Thanks for your sensible response.
    Dropping the car all around with say Eibach's, would leave the car too low at the front for normal driving. Which is what this car is used for.
    I will leave it alone.

  8. #8
    OpelAus King Dingaling guy 27's Avatar
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    Eibach Prokit is only 15mm drop from standard srit height.
    You'll find your strut tops have compressed as well as the springs have sagged.

    You really shouldn't scrap anywhere with Prokit on and putting new strut tops in.
    04 Astra Sri - Silver - Full red leather interior - mk4 888 wheels - Star light roof lining - lowered - ice - exhaust - vxr brakes - quite a few other things.
    my ride - no longer faster than qlds sri-t's
    OEM+
    04 Astra Linea Rossa - Build thread


  9. #9
    OpelAus Participant AllenR's Avatar
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    Click here to enlarge Originally Posted by guy 27 Click here to enlarge
    Eibach Prokit is only 15mm drop from standard srit height.
    You'll find your strut tops have compressed as well as the springs have sagged.

    You really shouldn't scrap anywhere with Prokit on and putting new strut tops in.
    Sorry for the slow response. I have just spent 3 days in the Victorian high country, driving around in a 1974 Ferrari 308 Dino.
    Serious good fun.
    Good thinking on the strut tops. I should replace them regardless and it should fix to some degree the front to back attitude.

  10. #10
    OpelAus Forum Hierarchy Wraith's Avatar
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    AFAIK the TS SriT hatch sits exactly the same front and rear as the TS SriT convertible, therefore I would recommend a set of Eibach Pro springs with a matching set of dampers (I have Koni) to suit and it will sit perfectly front and rear - have that combination on mine and the stance is perfect IMHO Click here to enlarge

    BTW the drop of the Eibach Pro set is more like 20-25mm measured before and after fitment.
    My rides: 2004 Opel/Bertone TS Astra turbo convertible - 2012 Mercedes Benz C204 C Class coupe
    Others: 2009 Honda City VTiL sedan - 2015 Fiat 500
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