Roll centre adjusters

[dubbedup]

Hey guys,

Has anyone used these? and at what angle does the front arm have to be before you would need to use these?

Cheers

[BC5RA]

Testing has reported a difference without any lowering.

But I would say it is a must for any significant lowering.

[dubbedup]

yeh i was about to put them in my old ke70 due to excessive bump steer (it was well sacked) im jsut about to lower my wrx and was hoping someone had used something similar on here...

[Guest]

think funky is about to or has done already fitted some of these, sound like a good idea, will be pricing some up for myself shortly

-smurff

[dubbedup]

group buy.... ;D

[PhatRS]

they are a must once your roll centre drops below the road level but I would think any lowered car could benefit. I have a set that I am about to put in so can yet comment on their performance.

[dubbedup]

For your setup PhatRS are they just bigger (taller maybe) bushes or do you have a full alloy adapter?

[nztintin]

I haven't used the extended ball joint adjusters but have done a similar mod to my forester removing a spacer in the front sub frame, achieves the same result of lower arm back towards factory position but car still sitting low, defiantly helped with bump steer and turn in on corners, my car was about 50mm lower than standard so it was quite a way from standard lower arm angles.

[dubbedup]

Is that only for foresters?

[PhatRS]

Mine are just an metal extender that goes over the factory ball joint. Im changing to the alloy arms too so I can do the free castor mod at the same time not that that will effect the roll center as such.

My car would be be 70mm lower than standard probly and because of the increased track (spacers and wide wheels) that I have anything that is a little out in the suspension gets magnified quite a bit.

[dubbedup]

all good, would love to see some pics....

[PhatRS]

Ill try and grab some pics tonight, the ball joints are still in the car so you wont really see how they fit.

[dubbedup]

some idea is beeter than no idea lol , thanks

[nztintin]

yup my mod was foz specific, instead of extending ball joint i raised the front subframe.

[Guest]

ok, so how do i work out if i need them, im about 100mm of the ground. what do i have to look at and how should the part be lol

-smurff

[funkytown]

Il post up some pics of my pressed steel to alloy arms, including free castor mod, Antilift and Roll center once if finished... should make heaps of difference in the front end for moi

[Guest]

I run the Whiteline RCA.

I am currently at just below stock height (355mm F/340mm R) yet they still increased roll stiffness and were an improvement. They would make more of a difference to a car with a lower ride height.

smurff, 100mm from which point? Even if the car is at stock height they are worth getting. Chances are at 100mm from any point you are too low already though.

[PhatRS]

heres a pic of my adjusters that fit on the factory ball joints.

[dubbedup]

are those custom, or can you get them off the shelf somewhere?

[PhatRS]

I got them made up by Jason Leifting http://www.jldesign.co.nz/, he takes his time making them but they are very well made and gold coated so they wont degrade with daily driving.

[funkytown]

 PhatRS said:

I got them made up by Jason Leifting http://www.jldesign.co.nz/, he takes his time making them but they are very well made and gold coated so they wont degrade with daily driving.

well priced? and do you have new tie rods match the new pick up point?

[PhatRS]

Lets just say a lot better priced than anything else that fits my car

No, Still working on the rest of the car so will have to put up with the increased bump steer for now, not that ive driven it in over a year.

[funkytown]

interesting to note that on my super lows and doing the swap to alloy arms and ALK i have got much increased bump steer.. I have to be quite careful now

also at 90% lock the last 10% feels like the wheels "flop" over to full lock - ie it pulls the steering wheel

[PhatRS]

Ill probly notice it more due the wider track on my car but well see. if youve upgraded the tie rod end too you shouldnt notice any more bumpsteer of course cos everything has been moved the same amount.

That flop could be due to increased castor, do they self centre a lot better from moderate lock?

[funkytown]

 PhatRS said:

Ill probly notice it more due the wider track on my car but well see. if youve upgraded the tie rod end too you shouldnt notice any more bumpsteer of course cos everything has been moved the same amount.

That flop could be due to increased castor, do they self centre a lot better from moderate lock?

i suspect the extra castor is the culprit.. i did the rotation of the ALK mount as well..

I havent done the tie rods or RC just yet - hoping that will help.

I dont seem to notice passive correction to center any more than it used to be - my wheels are slightly pigeon toed still as well, and quite a bit more camber. I should get an allignment asap huh