chrispy

iTrader: (21)

The RCA's I had on my car are now on my brother's car. They correct 1* of camber. And if you go too low the upper control arm will hit. You'll have to cut a hole or something so it'll stop happening.

kit cat

iTrader: (6)

....this whole lowering a GS thing is a friggin PITA.
I go lower, my tires rub, need alignment, can't get within spec, eats up tires, get SS kit, and now I have to deal with the upper control arm?? As if it wasn't hitting the wheel wells already...ugh.

so do i take the SS kit, fix 1 degree of camber, and bottom out even more

or

get new tires every few seasons...

RMMGS4

iTrader: (5)

The RCA thickness gives about a 1 inch drop, so if you add the RCAs and raise the coilovers up the one inch to keep the ride height the same, then the camber correction should be roughly the same as if you had no RCA's and raised the coilovers up 1 inch.

The camber improvement will vary depending on how much drop you have. It all depends on your starting and ending point. There is not a constant amount of x-degrees improvement.

At the end of the day all this talk on camber improvement will be minimal.

The RCA stands for "roll center adapter" for those that don't know. It's primary purpose is to adjust the roll center geometry.

It does not stand for CCA = Camber Correction Adapter.

If people want to use the RCA's for some other purpose other than to help roll center, well sure there are other advantages for these blocks, such as lowering 1" without buying coilovers, or clearing your LS400 BBK. It may help camber a bit, but if you are trying to correct for example: -2 degrees of neg camber, this is not the solution.

Adjustable upper A-arms is the real solution IMO.

Last note to the OP, Taeng. The RCA's ARE NOT to blame for his A-arm problem. If you lower our cars using coilovers, air ride, cut springs or RCA's. It doesn't matter what you use, at a certain drop point YOU WILL eventually hit the upper control arm. Unless your tire diameter is large enough to hit the inner fender well first. In Taeng's case he had stock dia tires, so trying to tuck is going to hit the A-arm for sure.

This is the mechanical limit of the suspension. If you want to exceed the design limits of what the Lexus engineers built into our cars, do so on your own accord, but don't blame the RCAs, or anything else.

kit cat

iTrader: (6)

Blow Design makes adj upper A arm but at 97500 yen. I've been talking to the Aristo guys and they pretty much told me if its only 2.6 degree, don't worry about it.

I just want my camber to be within 1.5 - 2 degrees since the GS is my dd. I understand that the primary purpose of the RCA is to fix the suspension geometry. But considering it is a GS, I'm not too worried about it. I'm interested in the by-product of the camber correction.

eyecon7

iTrader: (2)

how much are these RCA?

GS FONZy

iTrader: (6)

Find a shop that is willing to flip your tires every few thousand miles.
Most shops say this does not work and tires will cotinue to wear uneven, but trust me, flipping the tires will prolong the life of a camber wear tire.

kit cat

iTrader: (6)

i acutally do this every season. it's a PITA though