Tire Wear

[r34unit]

sup fellas
ive got wear on the insides of the rear tires ! could this be from being to low ?
the car has tein coil overs all round. how can i figure out what is causing this problem ?
cheers

[GTSBoy]

It's caused by having too much negative camber for the type of driving you do. If you drive in a straight line most of the time (ie, not on a track) then you cannot have much neg camber or you will wear the insides of the tyres. At the rear, the problem is made worse if you like to spin them up.

And yes, this is caused by being too low. As you lower Skyline rear suspension you automatically gain neg camber. You need adjustable polyurethane upper inner bushes at a minumum, or adjustable upper arms.

This has been discussed at great length, including recently, including the legalities of the various options. So have a look around.

[suwidji]

Have this same problem, but didn't realise until recently.

I dont track or spin the rears, just normal daily street driving. My car is lowered and has -2 camber from what was on my receipt when i got my wheels aligned after the drop.

[GTSBoy]

Any more than about -1 on the rear (or the front even) is just asking for camber wear on a daily. How much camber wear you can live with is probably the biggest measure of how much camber you can enjoy having.

[r34unit]

Is the any shop in the Melbourne south east that can adjust coil overs and eliminate the camber

[darksky34]

yes there are shops and i cant suggest any cos im in sydney but i just want to reiterate that if you want to stay lowered then you will have to use adjustable bushes to eliminate camber OTHERWISE if you purely want to adjust coilovers to eliminate camber you may be going back to stock height.

[niZmO_Man]

Is the any shop in the Melbourne south east that can adjust coil overs and eliminate the camber

Raise the car? Why not do it yourself? Or you can adjustable rear upper arms and wind the camber out (GKTech ones are nice).

[suwidji]

yes there are shops and i cant suggest any cos im in sydney but i just want to reiterate that if you want to stay lowered then you will have to use adjustable bushes to eliminate camber OTHERWISE if you purely want to adjust coilovers to eliminate camber you may be going back to stock height.

How much am i looking at for adjustable bushes, and do most mechanics/tyre places have them readily available?

[GTSBoy]

Pretty much no mechanic or tyre place will have adfjustable bushes to suit any car (except maybe Commodores!) in stock. Pretty much any tyre place cannot be trusterd to spin spanners so discount them immediately. Pretty much any mechanic could order bushes in within a day. If you fit bushes you need a set for the upper inners and a set for the inside/front ends of the radius arms as well. This will cost you a couple of hundred.

The arms need to come off and a press used to get the old bushes out and new ones in most of the time. The labour will probably end up costing more than the bushes.

Adjustable arms that have rose joints on the end (like the GKTech ones) are not street legal. Adjustable arms with bushes (such as Hardrace ones) probably are.....but you might be in for an argument with a cop and then the pain of getting it defected and having to clear the defect anyway.

[r34unit]

how about the arms form just jap whats the difference between the hard race ones and the SRI ones ?
and whats the difference between rose joints and bushes

[GTSBoy]

Rose joints. Heim joints. Ball joints. They're metal on metal. Really good location and articulation, but......extra NVH, they wear out because they get grit in them, they are an instant defect should a cop see them, and sometimes the cheap ones are shit quality and break.

Hard Race is a brand that does adjustable arms and the like but with hard rubber bushes in them instead of the rose joints used in most adjustable arms. There are one or two other brands out there that do the same. Bushes are squidgy material between two shells to allow arms etc to have some compliance instead of hard metal-metal contact.

[niZmO_Man]

My red ones (upper rear and front arms) from Just Just were gone/heaps noisy within a year. Got GKTech ones atm (rear upper arms)

[r34unit]

Feck I got the red ones from just jap

I should of order the hard race ones

[r34unit]

I hope they hold up

[niZmO_Man]

Mind you I have an R32 GT-R so the fronts tend to flog out pretty quickly. I was surprised at the rear ones though, so noisy after one year.