Page 42 of 45 FirstFirst ... 324041424344 ... LastLast
Results 411 to 420 of 442
  1. #411
    Armchair General Mirek's Avatar
    Join Date
    Jun 2007
    Location
    Prague / Eastern Bohemia
    Posts
    17,980
    Like
    3,450
    Liked 4,368 Times in 1,894 Posts
    Yes, McPherson is mandatory or at least it was until 2016. Now I'm not totally sure but since every team uses it I guess it still is.
    Stupid is as stupid does. Forrest Gump

  2. Likes: itix (8th September 2017)
  3. #412
    Senior Member
    Join Date
    Mar 2010
    Posts
    286
    Like
    67
    Liked 113 Times in 52 Posts
    Regarding the subject, last year PSRX experimented with both Mcpherson and double wishbones in WRX but from my understanding they ended up using Mcpherson after several tests.

  4. #413
    Senior Member SubaruNorway's Avatar
    Join Date
    Oct 2005
    Location
    Biri, Norway
    Posts
    3,681
    Like
    6
    Liked 527 Times in 226 Posts
    Quote Originally Posted by AMSS View Post
    Regarding the subject, last year PSRX experimented with both Mcpherson and double wishbones in WRX but from my understanding they ended up using Mcpherson after several tests.
    Hoonigan Racing is using double wishbone, stronger and doesn't change the alignment as much
    "Die with memories, not with dreams" Scott McIsaac
    http://www.motorsportfilmer.net

  5. #414
    Senior Member
    Join Date
    Mar 2010
    Posts
    286
    Like
    67
    Liked 113 Times in 52 Posts
    Quote Originally Posted by SubaruNorway View Post
    Hoonigan Racing is using double wishbone, stronger and doesn't change the alignment as much
    Yes and if I remember correctly this was the reason also PSRX tested it, I can be wrong though..

  6. #415
    Senior Member itix's Avatar
    Join Date
    Mar 2014
    Posts
    1,012
    Like
    847
    Liked 503 Times in 290 Posts
    Quote Originally Posted by SubaruNorway View Post
    Hoonigan Racing is using double wishbone, stronger and doesn't change the alignment as much
    Yeah but the unsprung weight is bigger meaning that the suspension is slower to react to changes. Sure it's probably stronger in case of a side impact on the wheel and sure, the camber stay the same even when when the suspension is compressed but does this really mean so a lot in rallying or rally cross? I doubt it. On a smooth flat definitely... Dirt and rough asphalt... Probably not.

    If they experimented with it I am sure they had a good reason though. I don't follow rallycross closely but I seem to recall that Hoonigan were doing quite well.

  7. #416
    Armchair General Mirek's Avatar
    Join Date
    Jun 2007
    Location
    Prague / Eastern Bohemia
    Posts
    17,980
    Like
    3,450
    Liked 4,368 Times in 1,894 Posts
    IMO the advantage of keeping the camber is more of an advantage in off road races where there is a need of good traction even with rather extreme positions of wheels. On the other hand these cars have usually huge wheels so they don't need to care about small bumps/holes unlike WRC cars with rather small diameter of wheels. Those huge wheels are also heavy so the weight of suspension alone doesn't play that big role.

    Double wishbone shall be better for heavy braking as well and as it was already said it's more robust and can take more beating.

    IMO there is another advantage of double wishbone and that's freedom of setting the castor. With usual McPherson setup there are massive forces in the steering coming from huge castor (angled strut) and with that more reliability problems appear.

    Take is as an amateur talk anyway
    Last edited by Mirek; 8th September 2017 at 17:03.
    Stupid is as stupid does. Forrest Gump

  8. #417
    Senior Member itix's Avatar
    Join Date
    Mar 2014
    Posts
    1,012
    Like
    847
    Liked 503 Times in 290 Posts
    Quote Originally Posted by Mirek View Post
    Take is as an amateur talk anyway
    If we knew what we were talking about on a truly professional level, we'd be working for one of the teams by now

    Pardon my ignorance but how can the caster angle cause forces? I know that the caster determine lift of the body when the wheel is turned (so a heavy landing with the wheels sideways would snap the steering out of your hands... But i think the car would flip before that tbh).

    If the scrub radius was large I'd understand it... You'd feel every little bump twisting the wheel out of your hands... But caster?

  9. #418
    Armchair General Mirek's Avatar
    Join Date
    Jun 2007
    Location
    Prague / Eastern Bohemia
    Posts
    17,980
    Like
    3,450
    Liked 4,368 Times in 1,894 Posts
    You said it - the bigger the castor the more you lift the heavy body when You turn the steering wheel. The power steering unit has to generate the force needed to lift the body and the whole steering assembly has to wistand these big forces.
    Stupid is as stupid does. Forrest Gump

  10. #419
    Senior Member
    Join Date
    May 2005
    Posts
    734
    Like
    88
    Liked 436 Times in 241 Posts
    Probably a stupid question but doesn't McPherson allow longer max. travel than double wishbone for given size/weight?

  11. #420
    Senior Member
    Join Date
    Aug 2007
    Location
    Athens
    Posts
    17,004
    Like
    4,820
    Liked 6,973 Times in 3,252 Posts
    Quote Originally Posted by mknight View Post
    Probably a stupid question but doesn't McPherson allow longer max. travel than double wishbone for given size/weight?
    yes.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •