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Lachie Regular Location: Adelaide Registered: January 2004	Re: Roll centre adjusters? RA28 Thu, 24 March 2005 01:18 Theres one other thing that I've read about roll centres and RCA's with respect to lowering that no one else has mentioned, and anyone, feel free to correct me if I'm worng. The difference in height between the front and rear roll centre's is crucial to the proper handling of your car. The front roll centre should be about 2/3 the height of the rear. This is important when you lower a car with MacPherson struts on the front and a live axle rear because it changes this relationship. As Joel mentioned, the roll centre of a MacPherson strut setup will change the roll centre when you lower the car. The problem is that when you lower the rear (with a live axle setup) the roll cente remains constant, as it's (about) in the centre of the diff. I've got an RA23 and when I found out about this stuff I made some very rough measurements and toyota have got the front roll centre about 2/3 the height of the rear, so in theory, you would want to keep that relationship. I'm not exactly sure what effect changing the height of one roll centre with respect to the other has on handling, but Bill Sherwoods site has some info on this kinda stuff. http://www.billzilla.org/suspensn.htm Just some food for thought ofr anyone planning to lower there T/RAXX [Report message to a moderator]

	Subject	Poster	Date
	Roll centre adjusters? RA28	blackRA28	Sun, 20 June 2004 13:56
	Re: Roll centre adjusters? RA28	rxtoy	Mon, 21 June 2004 10:03
	Re: Roll centre adjusters? RA28	Brenton_TA23	Mon, 21 June 2004 10:40
	Re: Roll centre adjusters? RA28	TurboRA28	Mon, 21 June 2004 11:22
	Re: Roll centre adjusters? RA28	Simon-AE86	Mon, 21 June 2004 11:24
	Re: Roll centre adjusters? RA28	Simon-AE86	Mon, 21 June 2004 11:25
	Re: Roll centre adjusters? RA28	TurboRA28	Mon, 21 June 2004 11:33
	Re: Roll centre adjusters? RA28	blackRA28	Tue, 22 June 2004 13:19
	Re: Roll centre adjusters? RA28	TurboRA28	Tue, 22 June 2004 23:11
	Re: Roll centre adjusters? RA28	blackRA28	Thu, 24 June 2004 02:36
	Re: Roll centre adjusters? RA28	TurboRA28	Thu, 24 June 2004 06:03
	Re: Roll centre adjusters? RA28	st184 sillycar	Thu, 24 June 2004 08:23
	Re: Roll centre adjusters? RA28	willwal98	Wed, 23 March 2005 12:29
	Re: Roll centre adjusters? RA28	TurboRA28	Wed, 23 March 2005 22:46
	Re: Roll centre adjusters? RA28	Lachie	Thu, 24 March 2005 01:18
	Re: Roll centre adjusters? RA28	TurboRA28	Thu, 24 March 2005 01:32
	Re: Roll centre adjusters? RA28	blackRA28	Thu, 24 March 2005 13:00
	Re: Roll centre adjusters? RA28	TA-022	Sat, 28 May 2005 01:52
	Re: Roll centre adjusters? RA28	Stefan	Sat, 28 May 2005 02:23
	Re: Roll centre adjusters? RA28	TA-022	Sat, 28 May 2005 02:43
	Re: Roll centre adjusters? RA28	blackRA28	Sat, 28 May 2005 03:25
	Re: Roll centre adjusters? RA28	willwal98	Tue, 31 May 2005 20:24
	Re: Roll centre adjusters? RA28	ra_28	Tue, 31 May 2005 21:44
	Re: Roll centre adjusters? RA28	Stefan	Wed, 01 June 2005 00:40
	Re: Roll centre adjusters? RA28	HyDrA	Wed, 01 June 2005 00:47
	Re: Roll centre adjusters? RA28	Stefan	Wed, 01 June 2005 06:41
	Re: Roll centre adjusters? RA28	blackRA28	Wed, 01 June 2005 02:25
	Re: Roll centre adjusters? RA28	TurboRA28	Wed, 01 June 2005 07:11
	Re: Roll centre adjusters? RA28	willwal98	Sat, 15 October 2005 23:39
	Re: Roll centre adjusters? RA28	RobertoX	Sun, 16 October 2005 02:59
	Re: Roll centre adjusters? RA28	willwal98	Sun, 16 October 2005 06:03
	Re: Roll centre adjusters? RA28	tanman	Sun, 16 October 2005 07:26
	Re: Roll centre adjusters? RA28	willwal98	Sun, 16 October 2005 07:44
	Re: Roll centre adjusters? RA28	yrhkira	Mon, 17 October 2005 01:14
	Re: Roll centre adjusters? RA28	willwal98	Mon, 17 October 2005 01:54
	Re: Roll centre adjusters? RA28	TA-022	Mon, 17 October 2005 08:22
	Re: Roll centre adjusters? RA28	willwal98	Mon, 17 October 2005 08:37
	Re: Roll centre adjusters? RA28	willwal98	Tue, 25 October 2005 13:17
	Re: Roll centre adjusters? RA28	Chriph	Tue, 25 October 2005 23:55
	Re: Roll centre adjusters? RA28	RobertoX	Wed, 26 October 2005 09:02
	Re: Roll centre adjusters? RA28	willwal98	Wed, 26 October 2005 13:34
	Re: Roll centre adjusters? RA28	Gabriel Tyler	Wed, 26 October 2005 17:13
	Re: Roll centre adjusters? RA28	Stefan	Thu, 27 October 2005 00:05
	Re: Roll centre adjusters? RA28	Gabriel Tyler	Thu, 27 October 2005 00:42
	Re: Roll centre adjusters? RA28	Stefan	Thu, 27 October 2005 01:00
	Re: Roll centre adjusters? RA28	Stefan	Thu, 27 October 2005 01:05
	Re: Roll centre adjusters? RA28	Gabriel Tyler	Thu, 27 October 2005 01:10
	Re: Roll centre adjusters? RA28	Stefan	Thu, 27 October 2005 01:21

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