Lowering a r33 gts-4

[Rewseyracing]

Lowering a r33 gts-4

Hi, just after some advice in how low you can lower a gts-4 or gtr without effecting the camber or geometry of the awd and suspension. The car is going to be street driven so nothing crazy low and still legal limit from the ground. But Would anyone know how low you can go on standard camber adjutsment and control arms ?

[GTSBoy]

The usually accepted number is the same, both for legality reasons and also how well the suspension works.  This is an "eyebrow height" of around 340-345mm.  The eyebrow height is defined as the vertical distance from the centre of the wheel hub (actually the centre of the wheel's own centre cap will do) to the height of the standard wheel arch/guard lip.  Actually measuring it on the slight outward angle that is likely to result from the wheel sitting slightly inside the line of the guard is not really a problem.  No worse than the measurement error of eyeballing a tape measure anyway.

[Rewseyracing]

3 minutes ago, GTSBoy said:

The usually accepted number is the same, both for legality reasons and also how well the suspension works.  This is an "eyebrow height" of around 340-345mm.  The eyebrow height is defined as the vertical distance from the centre of the wheel hub (actually the centre of the wheel's own centre cap will do) to the height of the standard wheel arch/guard lip.  Actually measuring it on the slight outward angle that is likely to result from the wheel sitting slightly inside the line of the guard is not really a problem.  No worse than the measurement error of eyeballing a tape measure anyway.

 alright good thanks for the reply so if i stay over 350mm from the top of the guard to the centre of the hub, I shouldnt need to get adjustable conrtol arms and camber kits, just a aliment will do ?? 

[GTSBoy]

I wouldn't say that you wouldn't need adjustable somethings.  That depends on the physical state of your existing bushes, how bent parts of the car are, etc etc.  Also, at or near that minimum height, you will possibly end up with more -ve camber than you'd like, particularly at the rear.  So some Whiteline kits installed in the rear uppers might make a lot of sense. There pretty much is no camber adjustment in the stock suspension.

I personally would not try to avoid putting in at least adjustable poly bushes in the front uppers and rear uppers, adjustable front caster rods with rod end (rose) joints, and possibly one or two other things.  Having the ability to wind in a little more camber at the front or a little less, plus change the caster can make a massive difference to how the car drives, tyres last, etc etc.

 

[vxsr33]

You won't need adjustable control arms or camber kits unless you are slamming your car.

If you lower it to the height GTSBoy stated, the drivetrain and suspension geometry will be optimal.

So all you will need is an alignment

[Rewseyracing]

I would get them if i could afford them but i just brought bc coilovers for it and cant spend a heap of money right now, i only plan on having the car 360mm eyebrow height, i dont mind gettibg adjustable bushings for it but trying to avoid getting new caster and upper control arms 

Thanks for the advice appricate it 

 

 

 

Edited July 27, 2017 by Rewseyracing

[GTSBoy]

I just checked the official pdf from SA Transport for the eyebrow heights.  R32&3 turbos are F345, R355.  All R34s are F340, R345.  R32&3GTR are F375, R355.

These are all with the vehicle in operating condition, but unladen.  So, no load in the boot, no passengers.

360 will be fine.  But keep in mind that 360 F&R might look a little wrong.

The 100mm clearance under the car and the 2/3s original suspension travel requirements are also in play but you should not have a problem at the acceptable eyebrow heights unless your exhaust hangs low or you have an extra CF lip on the front.

[Rewseyracing]

Thanks for all the help ill defently make sure the exhaust and everything else is above 100mm and hopefully have the front at 360-370mm and rear at 350-355mm. Ill still get the adjustable upper control arm bushes and rear bushes just to make sure the tyre wear is going to be happy