I think the general agreement is as you've stated. Mine has anti-roll bar  (XR2 
donor), but I've never tried it without. Anti-roll bar on rear should decrease 
understeer, anti roll bar on front increases oversteer - again of course that's 
simplified. I know when I changed the front MGB GT springs on my Calvy Mitchel 
to softer, (also longer free length) springs it increased roll, this made it 
much more driveable and decreased understeer as well - it was a huge 
improvement. It has no anti - roll bars, but that simple spring change is an 
example of what changes can emerge. One Calvy Mitchel owner put a huge diameter 
(about 25mm IIRC) on the front of his (and none on the rear) - I suspect it 
went straight on at corners!  
Martin
  ----- Original Message ----- 
  From: calum mcpherson 
  To: Quantum Owners Group 
  Sent: Sunday, September 03, 2017 7:44 PM
  Subject: Re: [Quantum Owners] XR2 rear anti-roll bar WANTED.


  I aint no expert , however , an anti-roll bar should make the rear work 
together from what I have researched , so I would have thought having one is 
better than not , particularly with front wheel drive cars (like the XR2 + 
Quantum) they are supposed to reduce understeer , allegedly.
  Do you have one fitted ?


  Calum

  On Sunday, 3 September 2017 19:31:27 UTC+1, Susan and Martin Scott wrote:
    These things can be very complex - I don't hope to understand them fully, 
and suspect the best way of 'testing' them is to do just that! Of course what 
may be better for track, may not be for road and vice-versa. Some people 
'improving' their cars fit fatter and fatter anti-roll bars, and it could be 
argued almost end up with a solid axle vehicle :-)
    Martin
      ----- Original Message ----- 
      From: calum mcpherson 
      To: Quantum Owners Group 
      Sent: Sunday, September 03, 2017 7:15 PM
      Subject: [Quantum Owners] XR2 rear anti-roll bar WANTED.


      As title, anyone got a complete spare one lying about a garage ?


      My 2+2 doesn't have one fitted and I wonder if I am missing out on a bit 
of suspension stability. Strange that in build manual it states 'If fitting an 
anti-roll bar', how many are without , surely they do a job on the car.


      Comments please.


      Calum.

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