Roll Centre Adjustment On R32 Gtr

[Beer Baron]

nice to see all the GTR suspension junkies in here...

[djr81]

front: 20mm id, 24mm od (and quoted as 192% stiffer than stock) hollow.

rear: 25.4mm id, 30mm od (and quoted as 162% stiffer than stock) also hollow.

both are not adjustable.

By my rough as guts calculations:

I have assumed they are just torsion bars. spring rate for torsion bars varies with the fourth order of diameter ie mm^4. But it is a long time since I have been to uni, so I may be forgetting something....

Anyway the numbers are:

Front

Cusco 24 od, 20 id. mm4 = 171,776

Whiteline front 22 od. mm4 = 234,256

ie Whiteline stiffer by 36%.

Rear.

Cusco 30 od 25.4 id. mm4 = 393,769.

Whiteline 24mm od. mm4 = 331,776

ie Cusco stiffer by 19%.

But that does not take into account any adjustability in the pick up points on the lever arms....

[Beer Baron]

hmm, interesting. so perhaps I'll be better off keeping my rear whiteline and just setting it to 'soft'. but I am keen to get the cusco's even just for the fact they are a fair bit lighter.

[STATUS]

for my reference page for swaybar comparisions,

http://www.whiteline.com.au/docs/bulletins...d%20Swaybar.pdf

old thread thats been around for years but is very useful.

http://forums.bimmerforums.com/forum/archi...p/t-334213.html

Edited February 12, 2007 by URAS

[salad]

Beer Baron: Are the Cusco bars adjustable?

Edited February 12, 2007 by salad

[T04GTR]

excelant. i started an thread on this a while back. but didnt go where i intended.

the cusco ones look really good. much better than the ikea formula ones i might add

[T04GTR]

also. is that pic from there website or a scan of a catologue?

[Beer Baron]

I scanned it from the 2007 dealers catalogue.

salad, the cusco bars are not adjustable. but it doesn't worry me as I have so much adjustment everywhere else! one less thing to play with is almost welcome!

[Gts-t]

Hey bb, how much do u think the whiteline bars weigh each vs the cusco

cheers

Edited February 12, 2007 by 2630GTS

[Beer Baron]

not sure but I'd guess the whiteline ones are approx 6kg and the cusco ones around 3kg. I'll weigh them both soon enough.

[Gts-t]

that is for both of them or each

i fitted these to my car so i should know lol

[Beer Baron]

each. I'd say the WL bar is 5 or 6 kg each.

[Beer Baron]

well back to the roll centres.

moon face have a few different options. from replacement arms with their adjuster in it (from what I can tell) to just the adjuster, down to spacers, and sleeves. costs is from around $900 down to like $200.

so dave, buy some mate, try it out, tell me what you think! lol

cheap way:

http://www.moonface.co.jp/mfr/roll/rollmain/index5.htm

rear "pro" kit

http://www.moonface.co.jp/mfr/roll/rollmai...ll%5Bpro%5D.htm

rear kit

http://www.moonface.co.jp/mfr/roll/rollmain/index4.htm

rear pro kit (no arm)

http://www.moonface.co.jp/mfr/roll/rollmai...ar%5Bpro%5D.htm

regular kit

http://www.moonface.co.jp/mfr/roll/rollmain/index2.htm

front kit (doesn't list 32 GTR though, just GTST)

http://www.moonface.co.jp/mfr/roll/rollmain/index.htm

[djr81]

So what is the difference between the pro kit & the ordinary kit for the rear?

BTW, the Australian distributor for this gear is trying to get onto SAU as a vendor. No having much luck....

[Beer Baron]

not sure about the difference between the kits. I will find out though. if I get them I will just buy from japan. works out better for me that way.

[djr81]

I think I will give the rear spacers a go first up. See what it does. May even get to back out some rake angle again. Woo hoo.

With the spacers you don't have to press the ball joint out of the arm hence they are cheaper/easier to buy & fit.

Also I thought (Probably wrong again) that the blue spacer was the only one available for the front of the R32 GT-R.

Edited February 13, 2007 by djr81

[Beer Baron]

cool. very interested to see how it goes. let's keep this thread going so hopefully we can all take a step forward. let me know what they cost too if poss.

[BHDave]

Who's the aus distributor for moonface? I like the look of that stuff as i have already gone to the trouble of replacing all my rubber bushes in the suspension arms and don't want to go the next step of full adjustable arms.

[djr81]

Who's the aus distributor for moonface? I like the look of that stuff as i have already gone to the trouble of replacing all my rubber bushes in the suspension arms and don't want to go the next step of full adjustable arms.

Drift shop Australia. Believe the blokes name is Costa.

www.driftshop.com.au

But as I understand it he is just starting on the Moonface gear. So an email may be the best bet. Just get in line, cause I have first dibs.

Edited February 13, 2007 by djr81

[BHDave]

Thats ok mate. I'm only after a set for a 32gtst, not a gtr

I'll have a chat with them in the meantime.

cheers

Dave