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Old 26-02-2013
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Chalkie Chalkie is offline
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Quote:
Originally Posted by Hulk View Post
Hi,

this is my experience with the +2 & -2 roll centre block:



+2 advantages
  • Better over bumps (less driveshaft plunge)
  • Rear feels more locked in
+2 disadvantages
  • Less steering
  • increased chance of grip roll (the rear inside wheel tends to lift, causing a jacking effect on high grip tracks)
  • Although the rear feels more locked in, when it does break traction it does so in an abrupt way
-2 advantages
  • More steering
  • Less grip roll (i always use -2 on carpet/astro tracks as it really helps reduce grip roll)
-2 disadvantages
  • Worse over bumps (increased driveshaft plunge)
  • Makes the rear feel looser on the rear (good if you like an aggressive car and faster if you can hang onto it!)

Nathan tends to use +2 at Worksop but only for the first few rounds of qualifying when the tyres are bedding in. Once the tyres have scrubbed in and gripping well, he will switch back to -2 in order to gain more steering.

Hope this helps.

Craig.
Have you tested the TD330308 low roll center hanger? Would I be right in thinking it would help on a smooth very high grip surface such as silverstones indoor astro track?
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