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  1. colinmseries

    Early 70's suspension analysis

    thread800-251968 Hi. As you will see from the referenced thread, I first asked yourselves for help with this project some 4 years ago. Finally, the model has been built, and I'm in a position to start drawing some conclusions and have started this thread in the hope you will help me understand...
  2. colinmseries

    Frame on castors

    Hi. Not sure if this should be in the structural section or here, so please refer me if it should. I'm wanting to build a mobile frame to support two small cars, something I can push around a workshop. They weigh about 1000kg each and the hope is to place one above the other on a frame mounted...
  3. colinmseries

    Scrub, KPI, spindle balance

    Hello. I’ve re-read the relevant bits of RCVD and looked through my pile of prints from your discussions. Let me tell you what I think is true and I hope you will give me your thoughts. My car has SLA front and rear I am lowering it by moving both the front and rear, top and bottom outboard...
  4. colinmseries

    Steering and suspension analysis

    I am writing an article for my car club magazine about the development of the car's chassis and would also like to explain some of its suspension and steering geometry with respect to how it feels in use. The car has SLA front and back and I am looking to use one of the free softwear packages...
  5. colinmseries

    Spindle length

    Can I ask for some help in understanding the role of spindle length. By this I mean when viewed from the front, that horizonal distance at hub height from the road wheel centre line to the steering axis centreline. I can see how the same scrub radius can be achieved at the road by using...
  6. colinmseries

    Why use front and rear ARBs

    This is something I've not been able to resolve from reading. My understanding is that an ARB adds roll resistance to that already provided by the wheel springs/bars and so allows a better compromise of wheel spring/bar rate. I realise that it adds to the overall rate at a particular corner in...
  7. colinmseries

    Ackerman question

    I'm working my way through Staniforth's suspension book and have read the previous threads but would appreciate help to clarify a few points. Norm and Greg amonst others point out how 100% Ackerman is not sacred unless applied to a slow moving situation like a fork lift, but what are the...
  8. colinmseries

    Primary and secondary engine balance

    I have been reading the closed threads on the subject of engine balance and think I have a rudimentary understanding but would appreciate your thoughts on my installation. I am fitting a significantly uprated 2.5lt in-line four, without balance shafts, into a road car. Refinement is less...
  9. colinmseries

    Power and torque curve dips

    I've just taken delivery of a modifyied i4 Duratech engine that's been taken out to 2.5lt The builder supplied a power and torque plot from the dyno and at 2200 and 4500 revs there is a pronounced dip of some 30-50lbs.ft I've asked him and he says this to some extent is always the case and is...
  10. colinmseries

    Real world loads

    I'm having some FE work done to assess the affects of modifying a front upright. Could yourselves give me an idea of the load profile I should be using, I'm thinking that the tyre contact patch average and peak loads in terms of g would be useful? Thanks, Colin.
  11. colinmseries

    Lower control arm position

    I'm furiously reading Staniforth et al and have a specific question I can't find explained. All the examples for unequal A frames I see, set the lower arm position as horizontal at neutral bump/droop when viewed from the front. I've search photos from F1 etc. and always see the lower arm level...
  12. colinmseries

    Anti-dive basics?!

    Forgive me if this is already explained elsewhere, I've looked and can't recognise an answer. I have a car with horizontal, parallel, twin wishbone front suspension (a TVR) and the front is to be lowered by 38mm, which over the wheelbase equates to approx. 1deg slope to the front. The rear is to...

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