alright guys i was looking for a little wisdom iv got a civic ej9 (european 1.4 ek hatch), i am after lowering the car on D2 coilovers, noticed a bit of rub when taking corners, i put some preload on the springs and this helped a little but the ride is very firm. looking into some swaybars,(so i can hopefully soften the spring rate up abit, as i only currently have a 22mm front ARB and no rear one) I was thinking of getting the whiteline front and rear swaybar costing around E310, 27mm front and 22mm rear, then i was offered ctr ones for E50 the ctr is 26mm front and 22mm rear, so my question is this, will i notice the diffrence in the two? or will the diffrence only be in my wallet and if i get one will i be able to soften the spring rate and cure my rolling/rubbing issue
Thanks for any help

Alan.

 

it's really difficult to go wrong with OEM bars, heck for that price I'd jump on the CTR setup quickly.
You can do a lot with the additional E260.

also, the additional size in the whiteline front bar will increase understeer, which our cars all ready suffer from. Most people go out of their way to decrease understeer.

 

he.s right. most people take off the front bar and/or add a bigger rear bar.

 

ok lads thank-you, im gettin onto the breaker so, and get the ctr ones what i save will cover my bushon kit!!

 

The Q you want to ask is 'will a aftermarket anti-roll-bar work as well as a ctr one?'

There are only 2 bars that (may) work better than an CTR rear: 1) maybe: the ASR 32mm EK style 2) sure: the 24mm Mugen EK9 sway

So am I and 9/10 of Civic driving Europe

Mistake #1

Never heard of it (need to check)

€50 for the both? You'd be mad not to buy this, these go up to €300

1) get a decent brand coilover/shock-spring combo
2) buy this EK9 sway set
3) get an ASR brace to mount your 22mm
4) enjoy
5) thank me

 

A sway bar does NOT soften the spring rate. Only the spring changes the rate. The sway bar just helps keep the side that is trying to lift off the ground stay on the ground.

I'd get the CTR rear sway only and keep your front stock, or pick up both and sell the CTR front to someone else and pocket the profit.

 

yes.

and springs control sprung weight. arb.s control unsprung weight is the easiest way to put it.

 

the plan was to fit the arb and then soften the spring rate as the D2's are fully adjustable, i know the physics behind the arb, all im trying to do is reduce roll so i can soften the spring for a (hopefully) smoother ride i just didnt know if the 2mm diffrence in the thickness of the two bars would make a big diffrence, and im sorry kristo ive gone through 3 suspension set ups, standerd () -40 springs on std shocks (great fast road setup) ohlins coilovers 1 way adjustable (good but not low with a good spring rate), and the D2's and iv had them for 5 months and think they are excellent quality just a little hard but iv a good amount of pre load so i want to take a bit off, but thanks lad's ill let ye know how i get on!

 

so you are trying to control the roll with the arbs instead of trying to control it with spring.

also that 2mm will make a big difference.

ill pop up a couple examples later if i remember.

 

here are my measurements.

length perdindicular to the center axis=5inches.
lenght of center to bends=25.5inches.
distance of torque arm(bend off center to center of mounting hole)=8.25inches.
and i used the diameters of 19mm.22mm.24mm which are very common sizes for honda/acura guys.

just from reference i used an itr rear arb for measurement.

my motion ratio was .764151. i measured this from my itr style f7 lca.
d1=10.125 d2=13.25

*disclaimer*: i used a ruler for this because i couldnt find a tape measure. lol. but these measurements are pretty much accurate as it gets to just use for an equation.

so anywho....the results.

19mm diameter= 393.6498lb/in arb rate.
arb wheel rate(body roll)=459.7252lb/in

22mm diameter= 707.5975lb/in arb rate.
arb wheel rate(body roll)=826.3702lb/in

24mm diameter= 1002.168lb/in arb rate.
arb wheel rate(body roll)=1170.385lb/in

as you can see as the diameter goes up the rate considerably.

also the arb wheel rate(one wheel) will be half of arb wr(body roll).

 

Wow

I knew it is something like this but don't know the theory (fomulae) behind it, or how to measure the diff parts. Think I have a link somewhere but should check.

You have a link to theory and how-to-measure on this, Egezzy?


So 'arb wheel rate' means that a sway bar adds considerable 'springrate', but only to one wheel when it is lifted relative to the other one on the other side, right? So on a perfect smooth road you don't have the effect of added 'springrate', correct?