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Thread: suspension question....

  1. #11
    Join Date
    Jun 2008
    Location
    Ringwood, Victoria
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    4,140

    and a big brake upgrade 312 vented and slotted discs up front
    Have one for sale off a Bora 4Motion....

    In regards to your handling, the LCA is engineered to sit at an acute angle to the road surface so that as it reaches the upwards travel limit, it approaches horizontal. By going lower than around the 20-30mm mark, you will change this so that the LCA is at horizontal, maybe slightly acute. Any further like you are proposing, you will have an obtuse angle to the road surface so not only is your LCA in the wrong position, your whole suspension geometry is now adversley altered.

    See here for a further in depth article....
    VWVortex.com - McPherson Suspension Geometry on our MkIV ....... shall we one more time?

    Stage 2+ Intercooler Carbon Intake Downpipe Swaybar DV+ Remsa.

  2. #12
    Join Date
    May 2010
    Location
    Sydney
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    Users Country Flag
    Quote Originally Posted by gavs View Post
    Have one for sale off a Bora 4Motion....

    In regards to your handling, the LCA is engineered to sit at an acute angle to the road surface so that as it reaches the upwards travel limit, it approaches horizontal. By going lower than around the 20-30mm mark, you will change this so that the LCA is at horizontal, maybe slightly acute. Any further like you are proposing, you will have an obtuse angle to the road surface so not only is your LCA in the wrong position, your whole suspension geometry is now adversley altered.

    See here for a further in depth article....
    VWVortex.com - McPherson Suspension Geometry on our MkIV ....... shall we one more time?
    So don't lower more than 30mm as there's no way to fix this???
    Mk IV Golf GTI - BMP - GIAC chip, R32 wheels, KW coilovers, rear swaybar.
    Originally Posted by JoeVR
    I've never been a big fan of rotors, or really Japanese cars in general, so my choice would have to be..... an RX-8.

  3. #13
    Join Date
    Oct 2007
    Location
    Bairnsdale & Ferntree Gully, Victoria
    Posts
    7,491
    Quote Originally Posted by Speed View Post
    So don't lower more than 30mm as there's no way to fix this???
    if you want to be 'correct' and be safe... maybe

  4. #14
    Join Date
    Nov 2009
    Location
    Newcastle, NSW
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    79
    Users Country Flag Thread Starter
    ... i a little confused, there are so many people here that dump their dubs, with the proper suspension, sway bars and droplinks... and they report have improved handling. but like speed said "no more than 30mm ?" is that the limit?
    MK4 2003 GTI - GIAC - APR R1 DV - 17 BBS - TT short shift

    42DD 3in DP - AWE 2.5in CATBACK - POWER GASKET+
    ECS LIGHTENED PULLEYS - AFE Pro S Stage 1 Intake

  5. #15
    Join Date
    Oct 2007
    Location
    Bairnsdale & Ferntree Gully, Victoria
    Posts
    7,491
    no its not the limit, but the cars suspension really starts to change belew that apparntly
    mine was low enough that the driveshalf was starting to rub on the frame over bigger bumps
    all i have is a front sway bar. Sure everything works, but i believe all the bushes etc are stuffed, i dont think the car handles better, its just stiffer and has less body roll due to the coilovers and front bar

  6. #16
    Join Date
    Jun 2008
    Location
    Ringwood, Victoria
    Posts
    4,140
    It is stiffer but the problem is that your suspension geometry isn't "pushing" you wheels into the ground anymore, it's just kinda holding them at a weird angle. It's a placebo effect, people automatically think that by lowering their car, it handles better. I know of off-road racing vehicles that handle far better than an overly lowered dub, falcon, commodore etc and they have up to 1m of suspension travel. I'd put my 25mm-30mm lowered golf against a 55mm lowered golf with the same engine etc and I'll guarantee that if you drove both, the super low might feel stiffer (if it still has it's anti-rollbar fitted) but mine which takes a set after a slight roll will feel better and give you more confidence in pushing it.

    Handling is basically a term to describe the amount of chassis-derived grip that you have. If you are removing the ability for your car to "push" onto the road surface, then you will be removing grip. This can be easily evidenced over rough ground and trying to accelerate out of a corner. Look, if you are after looks, go for it, just don't be surprised when you start replacing bushes and things start to creak and groan. And watch out for the cops, hey dylan...

    Stage 2+ Intercooler Carbon Intake Downpipe Swaybar DV+ Remsa.

  7. #17
    Join Date
    May 2010
    Location
    Sydney
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    Users Country Flag
    Quote Originally Posted by aisekulic View Post
    ... i a little confused, there are so many people here that dump their dubs, with the proper suspension, sway bars and droplinks... and they report have improved handling. but like speed said "no more than 30mm ?" is that the limit?
    I was basically sumarising gavs comments and putting the question out there.

    I also agree when gavs says super low cars generate a placebo effect re the actual handling.

    If your after "optimal" handling, then don't go below 30mm. If your after a look only and prepared to suffer greater stress and wear on
    your chassis and suspension components, then go lower.

    You'd be surprised how much stress a super low car can generate. In some cases 10mm beyond the threshold (in this case 30mm) can
    generate an additional 100% stress.
    Mk IV Golf GTI - BMP - GIAC chip, R32 wheels, KW coilovers, rear swaybar.
    Originally Posted by JoeVR
    I've never been a big fan of rotors, or really Japanese cars in general, so my choice would have to be..... an RX-8.

  8. #18
    Join Date
    Nov 2009
    Location
    Newcastle, NSW
    Posts
    79
    Users Country Flag Thread Starter

    you make a good point. for me handling is important, i do tend to push my car and even with stock setup im often surprised at how well it holds in some tight corners. but there is little role, and i figured going for coilovers it will give a good balance, a little lowered with improved handling. im not looking for super lows anyhow as i have a steep drive way to get into, and my car tripods as it is thanks all for the info good to see people happy to discuss
    MK4 2003 GTI - GIAC - APR R1 DV - 17 BBS - TT short shift

    42DD 3in DP - AWE 2.5in CATBACK - POWER GASKET+
    ECS LIGHTENED PULLEYS - AFE Pro S Stage 1 Intake

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