Rear Sway questions

[R_Ethug]

Okay well I decided the very last mod to hit my jetta is gonna be a rear sway I dunno why I never got one before but I thought I should now.

My only dilemma is getting a 25mm or 28mm. Like honestly I can't see the whopping 3mm in diameter making the 28 stronger,etc but okay.

Now I don't have any aftermarket front sway just the stock which is 23mm and from what I've read on vortex the 25mm rear will complement this perfectly. If i had an aftermarket 25mm front the 28mm rear would be better.

Any opinions before I shell out some money.

oh.. H&R or neuspeed will be the choice.

[Khyron]

Re: Rear Sway questions

Fronts increase understeer, rear increases oversteer. If you increase the front and the rear you can cancel both of them out and just add weight to your car.

MK4s understeer like mad. You want a big bar in the back with as small one in the front. The only reason to replace the front is if you need clearance. But even if you do replace it you either go stock size or a bit smaller.

Get the 28 on the rear and leave the front alone if you are not rubbing. You will notice it on hard cornering.

Khyron

[Boy Racer]

Re: Rear Sway questions

Unfortunately things aren't as simple.

Fronts increase understeer, rear increases oversteer.
Khyron

Unfortunately things aren't as simple.

If you increase the front and the rear you can cancel both of them out and just add weight to your car.
Khyron

but you have just increased spring rate on all four corners though.

The only reason to replace the front is if you need clearance. But even if you do replace it you either go stock size or a bit smaller.

Khyron

Not true, please dont go smaller on lowered Mk4s

Read the long debates on real racing forums for more insight in this topic. Hint: McPherson Strut in our configuration gains much positive camber as our front suspension compresses. So you have much less rubber contact on the outside (loaded) front wheel. Not a good thing. A BFB minimises this and actually reduces understeer on lowered Mk4s because of it.

Bart has changed for a big front bar
I have changed for a big rear bar

We both got less understeer.

Now if you were to be higher, ie A arms sloping downwards towards the outside of the car, this positive camber effect would not be any concern and you can follow the traditional "soften one end for more relative grip, harden one end for less relative grip".

Miles has a disconnected front sway, but he is up there in rally world height of suspension.

Get the 28 on the rear
Khyron

Totally agree on this one
Do it now!

You may also want to check out Autotechs hollow club sport, really nice new design on the end links. (Biased view as I have one)

[R_Ethug]

Re: Rear Sway questions

i'm leaning towards the H&R cuz well its H&R and apparantly lubeless but they on backorder (or can you get a 28mm one simon??)

everyplace has the h&r 25mm tho

[Kor]

Re: Rear Sway questions

You may also want to check out Autotechs hollow club sport, really nice new design on the end links. (Biased view as I have one)

Agree on the endlinks design.

[R_Ethug]

Re: Rear Sway questions

oh when they say drilling is required wtf are you drilling ??

[Boy Racer]

Re: Rear Sway questions

Holes

[R_Ethug]

Re: Rear Sway questions

yea but where?

[Boy Racer]

Re: Rear Sway questions

Just the solid piece that is between and in front of the rear wheels. It is not hard to do. Really.

[Boy Racer]

Re: Rear Sway questions

Sorry, excuse the humour

[Boy Racer]

Re: Rear Sway questions

I will check the 28mm H & R though

[Kor]

Re: Rear Sway questions

I honestly think the drilling is a good idea, the bar is more securely held, rather than just hanging from the ends.

[Silverstoned]

Re: Rear Sway questions

Yep Yep, IM me if you have any questions Ryan. It is the best mod to my car so far, although the FK kit is a close 2nd. Easy to adjust, and about 15 minutes to re-lube if that's your only reason to go with H&R. I have only re-lubed mine once, and that was only because I had the bar dropped anyway for the FK install.

PS - I can lend you the necessary drill bit, it took me half a day and 5 different hardware stores to find the proper size. I think it was either Princess Auto, or House of Tools that finally had it. Does anyone have one of those 'bit buddy' drill bit sharpening tools by chance? I couldn't find the right size in titanium, so after I worked up to my largest Ti bit, I had to use the regular hardened steel one for the final size.

Jeff

[jazzgtivr6]

Re: Rear Sway questions

I ran a Autotech hollow rear sway, 28mm

and it was by far the best upgrade that I made.
If you choose
Neuspeed
autotech
or
H&R

You cant go wrong


PS
Becareful in the rain and snow, as the bigger bars have a Mid corner drift clause built into them

[kuhli]

Re: Rear Sway questions

Had the ABT on my previous car, haven't mounted it on the new one because it's still very, very new). On the old one which had the worst tires ever (Kumho 711's) it definitely kept the car flatter and more balanced. Especially on speed bumps

At the limit(or very, very near) all 4 tires(especially outside 2) would begin to fail at the same time, rather than progressively understeer more and more until you have no steering!

I did however get the feeling that there was a lot more load being applied to the outside front and you could feel the inside front scrubbing for traction - something that happened before but it wasn't as apparent in the wheel. In fact I suspect that the inside front was now getting a little traction as opposed to non previously.

Maybe my interpretation is screwy but that's what it felt like! Any ideas? Simon? on how to keep that inside front planted?