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Rear Swaybar

KezR33
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KezR33 Veteran

KezR33

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So, I got my whiteline rear sway bar put on today, along with my Kumho KU36s on the front and full suspension check/alignment. My whole suspension was apparently all over the place, with a lot of negative camber on both wheels.

Anyway, since getting the car back, the car feels... good. I suspect this is the proper alignment making the a car much nice driver, however I have concerned about the sway bar. When cornering, not even when cornering hard, it feels like the rear really wants to kick out.

When coming out of a round about I gave the car a little prod and I felt the rear lose traction slightly.

My question is, is this normal? Will I just have to get used to this new driving style, or is the rear bar a little too stiff perhaps? I was told it would help combat the under steer in my nose heavy Supra, but I feel less comfortable cornering now that I did before.

I'm quite the novice when it comes to suspension (although I am learning!), so I'd appreciate any feedback.

Cheers,

Kieran.

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KezR33 Veteran

KezR33

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Quick update, took the car for a bit of a spirited drive today and it handles really, really well.

It feels like it wants to let go (or at least when the car felt this way prior to the changes it was going to let go), but it just grips and goes. I guess I have to relearn the car and its limits, might wait till DECA before I really start pushing it though.

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  • 2 months later...
Munkyb0y Grand Master

Munkyb0y

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so does that mean that upgraded front swaybar only, will cause understeer?

and how about the balance of stiffness between upgraged front and rear, on r33 in particular? 24mm front + 22mm rear. will it tend towards understeer?

or will the rear end (being much lighter) have less roll than the front, regardless? ie. tend towards oversteer

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MrStabby Grand Master

MrStabby

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so does that mean that upgraded front swaybar only, will cause understeer?

Yeah, or more correctly shift the bias of the car from oversteer to understeer. If you stiffen up one end, the tyres at that end will work harder and therefore loose grip earlier relative to the other end.

and how about the balance of stiffness between upgraged front and rear, on r33 in particular? 24mm front + 22mm rear. will it tend towards understeer?

or will the rear end (being much lighter) have less roll than the front, regardless? ie. tend towards oversteer

There's more to it than the diameter of the bar - the length of the arms also determines how the bar flexes - think of what happens with a longer bar when you're undoing a nut. That's why the outer connections on an adjustable bar make it less stiff. WRT weight - the heavier end will work the tyres harder, so you can compensate for that by putting more bar on the other end.

IMO its best to replace both front and rear at the same time and get at least one adjustable so you can play with understeer/oversteer balance. If you're going to track it adjustables both ends.

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Munkyb0y Grand Master

Munkyb0y

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good info :)

so what have people generally found on 33gtst for street with the 24mm adjustable front + 22mm fixed rear? which adjustment works best at the front?

so settings are like so. ie. more leverage, less resistance. makes sense

20070505_2885.JPG

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MrStabby Grand Master

MrStabby

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so what have people generally found on 33gtst for street with the 24mm adjustable front + 22mm fixed rear? which adjustment works best at the front?

Each car will be different (tyres/wheels, alignment settings) so just try the middle setting first for a bit and see how you like it. Trackday would be safest to try out different settings.

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gotRICE? Veteran

gotRICE?

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IV had an adjustable front swaybar sitting in the boot of my R33 for over a year now still in its packaging.. wonder how well its working :D

But in all seriousness, i was going to wait till i got the rear to install it, and just never got it. Was going to put it in soon, but the general consensus is that i should get a rear one and do both at the same time yes?

Interesting the rears are quite a bit more than the fronts. Ideas?

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