F.A.Q.    Register    Login    Home Members    Search

Toymods » Tech & Conversions » Roll centre adjusters? RA28 Show: Today's Posts  :: Show Polls  Email to friend

Author	Topic
RobertoX Regular Location: Adelaide Registered: May 2002	Re: Roll centre adjusters? RA28 Sun, 16 October 2005 02:59 This is a pretty good thread, quite a bit of good info Oh willal98 you would probably want to measure the length of your strut rather than the distance of the LCA to the ground. You can then compare this to a stock sturt and the difference in lenght is the height of the RCA you would want. If you measure from the centre of your wheel to the top of your wheel arch and then the same on a stock car (doesnt matter the size of the rim or anything. Then you can also use this to find the size of RCA in exactly the same way and its easier to measure There are several things that the RCA's do to your geometry to improve it. 1. Reduce bump steer, as covered... puts your steering arm geometry back to factory. 2. Puts the LCA back in a region where it will increase the camber of the wheel as it bumps at a higher rate than with the car lowered without RCA. ie again where toyota designed it. 3. Adjusts the suspension roll centre, moves it up to where toyota designed it to be. As explained the roll centre is a point about where the chassis moves about, an axis of rotation. When cornering the lateral force on the body of a car, acting through it's CoG, creates a moment about this point. If you increase the distance of the CoG to the RC then you are increasing the lever arm that the force acts on and hence increasing the roll moment. This will mean that for a given spring rate and anti roll bar rate the car will roll more for a given force! When you lower your car with mac struts then the RC is lowered, increasing this moment. When you put RCA's in your car the RC is moved up closer to the CoG. Also like someone said before, if the RCs at the front and back are raised or lowered different to each other this will upset the balance of the car. This is because between them they create a roll axis along the body of the car that the CoG acts around (there is only 1 CoG for the chassis, not one for the front of the car and rear of the car, which people sometimes get mistaken about because RC's are often talked about in terms of front and rear suspension). This can affect front and rear weight transfers and can be compared to using different spring rates on the front and rear of your car and how they affect handling. But anyway, I noticed a difference to both bump steer and body roll when I installed some RCAs on my sprinter (I got them from whiteline). Also I dont really think much about the negative camber RCAs as pictured above because they will create a greater wheel scrub radius (if using the same offset/width wheels). This will affect handling (steering feedback and heaviness) and create extra stress on wheel bearings etc. Just get some strut top camber adjusters or Longer LCAs... /$0.02 [Updated on: Sun, 16 October 2005 03:00] [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

Previous Topic:	how big is your turbo on your 4a-gte?
Next Topic:	Question about 175mm Pully & Intercooler question

Powered by: FUDforum 2.3.8
Copyright ©2001-2003 Advanced Internet Designs Inc.