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CIH

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Posts posted by CIH

  5. What car to Get ?

    in General Problems / Discussions

    Posted

    problem you will have is Pre93 jap metal, will either be expensive, or rusty......

     

    but you could look at some of the more obscure jap cars.

     

    datsun sunny turbo....is an option if you can find one, or some of the older nissans...which end up being datsuns...anyway

     

    They didn't do a Sunny Turbo other than 4x4 N14 GTiR. Do you mean Cherry Turbo ?

    I've been looking at N13 (Hatch) or B12 (Coupe) Sunny ZX' which are awesome for adjustment as most of the GTiR stuff can be retro-fitted but have only seen one or two in 6 months.

     

    I doubt any Datsun would be adjustable. Most of the 80s cars have semi-trailing arms at the rear ala E30 3-series. I know lack of rear adjustment bothers the S12 Silvia guys. Besides I don't really need the complication of a Turbo.

     

    So far, Mx5 & Mk1 Mr2 are looking best. I think the Mx5 would be overall better but the MR2 more interesting though I'll need more like ~£1500. Work has been very quiet and the pay dire. Uh, more dire than normal.

     

    Besides, I've never fancied hair-dressing. ;)

  11. CIH's Training Thread

    in Geometry

    Posted

    I'm reduced to using Forza, and it's Replay Telemetry, while I'm at home but with steering on full lock, camber was diametricaly opposed.

     

    Is that true of SAI and toot ? ie, the figures obseved with the steering in one direction should be consistant with the other direction ("mirrored"). Unless you were looking at a Galaxy, that is.

     

    Is this a similar situation to Included Angle in that you're looking not for specific figures but for consistency acros the axle ?

  12. CIH's Training Thread

    in Geometry

    Posted

    Before i can explain TOOT's dynamic influence i need to know if you read and understood this thread> http://www.wheels-inmotion.co.uk/forum/ind...t=0&start=0

     

    I think I can see where this is going but there's no point I'd like to clarify.

    Am I correct in thinking that hard cornering, and the associated shifting of the vehicle's weight, will impact on camber ?

    Ie; as the inner wheel moves to an unloaded state, as the weight of the car shifts against the direction of the turn, the inner wheel will move toward positive camber and the outer wheel, under load, shifts toward negative camber ?

    I assume SAI won't change significally, save for any give in the rubber components ?

     

    So, Scrub Radius (SR) is the actual point of contact between vehicle and tarmac. This is determined where Camber and SAI angles meet. When the wheels are at the straight ahead this should be at the centre of the tyre tread.

    The SR will migrate across the tread during cornering, due to (or in part to) dynamic changes in camber.

     

    Am I correct so far ? :)

  14. CIH's Training Thread

    in Geometry

    Posted

    DSP600

     

    On the DSP600 you have to do a castor swing (20 degrees) this swing acquires the secondary angles but it's not displayed on the main screen unless prompted.

     

    Ackerman and TOOT are the same thing just different terminology.... what understanding do you have of either?

     

    I can't recall any options to view toot using the usual tabs ?

    ViewTools.jpg

     

    As for TOOT/Ackerman, I only understand so much as I understand it's a similar reason a car requires a diff. That is, the outer wheels travel a larger distance, and a different arc, when negotiating a given corner.

  17. BMW >2005 front camber adjustment

    in Suspension

    Posted

    See it's easy once you approach the task in hand without feeling intimidated.

     

    I assume the front run out of neg adjustment? in that case i wouldn't have gone so deep at the rear just to maintain the sports neutral properties, at the mo she's boarder under-steer.

     

    No, it was an end-of-day rush job so I was pushed for time.

    Toe and Camber were symmetrical across the front axle so I was reasonably content to leave it as was.

     

    Would you have stayed within BMW tolerance or gone further to a neutral angle btw?

  18. CIH's Training Thread

    in Geometry

    Posted

    Off untill Tuesday now so it'll take a while before I do another Hunter.

     

    I've noticed the primary angles give no indication of SAI. Haven't looked for a while but is there a Seconday procedure specifically for SAI (such as there is for TOOT etc) ?

    I'm going to try and "sneak in" some secondary measurements in the future as I'd never even heard of them prior to WIM.

     

    edit: Could you get into more detail in defining Ackerman please ? Especially how it differs from TOOT ?

  20. CIH's Training Thread

    in Geometry

    Posted

    No , it wasn't as severe as that. It was confined to the tread. Took a picture with the camera phone but it's very poor. I know it's hard to say without actually seeing it.

     

    And yes, he knows what I'm up to.

     

    Anyway, back on topic ?

  22. CIH's Training Thread

    in Geometry

    Posted

    I understand Westfields are notorious bump-steer'ers due to poor location of the steering-rack.

     

    Incidentally, remember our hyperthetical MX5 scenario ? Had that today. Facelift Porsche Caynne (Jeep affair thing). To look at the tyres I'm immediatly thinking Camber. Smooth wear, localised on outer edge on all 4 tyres to varying degrees. Slapped it on the rig and all primary angles were near enough spot-on, save for Steer Ahead which was wandering -/+ 2 minutes. Was at loss but given it was still under warranty I advised get it back to Porsche with a copy of our report and one of the tyres in the boot. Maybe a bad bush somewhere ?

     

    Y'know the more I look into this the more I'm getting frustrated at KF. I'm just skimming the surface and, as my Hunters are taking longer as I respect ride-height pre-checks, pre-loading etc I'm under more pressure. And I'm only measuring primary angles at the moment too. That rig is wasted on KF.

  25. CIH's Training Thread

    in Geometry

    Posted

    In reply to question 4

     

    Are you ready for this yet without concluding 2 and 3?

     

    Just one quick point to Q4. If aftermarket TREs were fitted would that require bespoke toe settings ? Or would factory suggested settings still apply ?

    Otherwise I'm good. I actually quite enjoyng this ^_^

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