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Recent content by Overlap77

  1. Overlap77

    Toe / SAT

    This forum's much more interesting than car magazines, and yet, here is compelling "evidence" for Porsche actually being technically superior, rather than the journos constantly saying they are the best, but never giving technical reasons why. I notice the MGF is in there. When these came out...
  2. Overlap77

    Toe / SAT

    thanks. I don't understand this "Efforts to clamp down steady state roll gradient are a lost cause because the peak roll jumps up, requiring unlivable roll damping (from RIDE dampers that can rupture vital body parts and release unwanted bodily fluids). And even break parts when necessary ...
  3. Overlap77

    Toe / SAT

    So as I look at the data for the FWD Saab with Strut front and a twist beam rear and compare to the Jaguar, with Double control arm and multilink rear, it's hard to discern much of a difference. I'd often wondered how people could get so misty eyed about certain cars, yet when you drive them...
  4. Overlap77

    Toe / SAT

    that is fascinating, thank you. I'm busy today but I'm going to study that and try and say something intelligent !
  5. Overlap77

    Toe / SAT

    You're quite right. It's all to easy to throw in the wrong terminology without thinking. to quote " The rather LARGE values for vehicles on these plots can surprisingly come from vehicles which might be puffed up as world class state of the art right brained fantasies, but in fact are almost...
  6. Overlap77

    Toe / SAT

    thanks Greg - if I understand the point Cibachrome was making about SAT, that modern cars have been "stiffened" in so many areas that SAT is used to try and dial in the understeer? I thought SAT was something that was describing tyre behaviour rather than slop in the steering system.
  7. Overlap77

    Toe / SAT

    ok i will try and ask a question without answering myself that relates to this topic. Greg was the BMW you mentioned an E36? I remember driving one for the first time, and wondering why the steering felt so "dead", could this be the reason? thanks
  8. Overlap77

    Toe / SAT

    sorry i found it - in Bundorf analysis on wikipedia "SAT compliance steer. The aligning torque directly twists the wheel on the compliances in the suspension, generating a steer angle. "
  9. Overlap77

    Toe / SAT

    Hi i'm reading this page https://www.eng-tips.com/viewthread.cfm?qid=432856 but I can't find what the SAT in toe/SAT stands for. Could someone please help so I can fully understand the points made in the discussion thanks
  10. Overlap77

    Rear Wishbone Mounting - why do vertical bushes get used when it seems "wrong"?

    Superpro have made a bush for the rear of the Mk7 arm which combines poly with stainless steel rollers I'm told.
  11. Overlap77

    Rear Wishbone Mounting - why do vertical bushes get used when it seems "wrong"?

    Yes i see what you mean. The more sporting models would have the voids removed in the "ride" bush. Fiat Coupe/Alfa 155/156 etc have an arm design where you need some force to install so the bush is twisted at ride height and under no twist at full droop.
  12. Overlap77

    Rear Wishbone Mounting - why do vertical bushes get used when it seems "wrong"?

    thanks Brian. that explains it very well. I've noticed on an old 205 GTI i had what an AMAZING difference stiff poly bushes made (both "correct" bushes) but huge NVH increase. Conversely my daily driver is a Fiat which has the rear bush like the Golf and even though the bush has wear it still...
  13. Overlap77

    Rear Wishbone Mounting - why do vertical bushes get used when it seems "wrong"?

    thanks Greg. COuld you possibly help a layman understand the Axis involved by way of a drawing. The only thing I could find online pertained to robotics and I couldn't reference it to a car.
  14. Overlap77

    Rear Wishbone Mounting - why do vertical bushes get used when it seems "wrong"?

    Anyone who designs saloon car suspension for the manufacturers care to comment? thanks
  15. Overlap77

    Rear Wishbone Mounting - why do vertical bushes get used when it seems "wrong"?

    I've never seen a lower arm rear bush of that design on anything designed with racing in mind e.g Caterham, Radical etc. I can see how the void permits the up and down movement but surely on limit the bush will cause more geometry change?
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