Leighton, That was probably a bit excessive saying they are a disaster waiting to happen but they do chop out. This happens reasonably quickly in race conditions. As Cam mentioned, the bushes in the arm have to be distorted to pull on large amounts of caster. This means that with any bumps the pivot shaft is trying to split the bush. With a rose joint, the ball automatically aligns with the shaft and has minimal friction allowing the suspension to work more freely. For smaller amounts of caster (below 2.5 - 3 degrees) the bushes will absorb this amount of deflection without the load on the bushing being excessive. This is why manufacturers use rubber/urethane bushes in situations for up to 3 degrees caster. The load increases exponentially with the amount of bush deflection. It all means that my personal preference is for a rose jointed arm over a bushed one. If in the interests of legality you have to have an arm deemed suitable for road use it looks like you have to have a bushed arm.
Cheers Feral Errol -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Leighton Sent: Sunday, 24 February 2002 4:29 AM To: [EMAIL PROTECTED] Subject: Re: Whiteline suspension upgrade by saying bushes are a disaster waiting to happen do you mean that doing the shims or threaded type you have to ue rose joints??? Thanx Leighton ----- Original Message ----- From: "E Smith" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, February 23, 2002 9:41 PM Subject: RE: Whiteline suspension upgrade > I have the same 5/8" UNF rose joints on my sunny coupe Lower control arms. > They were $90 each trade (aircraft grade) but are semi sealed and have a > load rating in keeping with the price. The advantage is that they are > precise and also allow for caster angularity on the arms. Bushes are a > disaster waiting to happen. > Cheers > Feral Errol > PS I do not believe adjustable control arms are road legal in any state. I > have been down this road many times before and have yet to any one that will > say yes they are legal. If the police look at your suspension the make it a > tow home condition here as well. Still doesn't stop most rally cars or > road/circuit cars though. > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of Williams, Ritchie > (Vertex Hamilton) > Sent: Saturday, 23 February 2002 2:21 PM > To: [EMAIL PROTECTED] > Subject: Re: Whiteline suspension upgrade > > I have 5/8" UNF Rosejoints on the lower arms on my 1600 rally car & have > never had a problem with getting a warrant in NZ. > > They with stood a 4 x rollover which bent tie rod ends & rear control > arm & showed no signs of any damage. You would be supprised how strong a > good quality rose joint is(emphasis on good quality). If you looked at > most modern WRC cars all of them use rose joints for suspension > adjustment. They do need regular maintenance with lubrication though or > they will flog out. > > > > > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
