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  • Users: willeng
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  1. willeng

    Rear Wheel Torque Values

    I found some differing equations on the internet than what I thought on how to arrive at the rear wheel torque value for motorcycles, so I thought I had better ask here to make sure. One site said Rear Wheel Torque = Chain Tension X Tooth Count Ratio (front & rear sprockets) I was under the...
  2. willeng

    Suggestions or advice please.

    If anyone would like to comment or has any suggestions on the following figures please do so. Please throw bricks if you have to! Double unequal A arm front suspension-road rally & circuit use. The suspension has 75mm bump & 50mm droop- static camber (-2deg). Camber (-.7deg) at 50mm droop &...
  3. willeng

    Tyre spring rate

    Could anybody help me out with a simple test method to find the Tyre Spring Rate or a Constant figure to use in suspension programs for the Tyre Spring Rate in Kg/cm or lb/in. Thanks
  4. willeng

    Manganese Bronze

    Could someone suggest the correct tooling for Turning,Drilling, Boring & Reaming Manganese bronze. Thanks
  5. willeng

    Rear Leaf springs

    Is there any real advantage of replacing the conventional multiple stack leaf spring setup with a (single) rear leaf spring of the same rate. To me it seems like a real headache but others around me think that this is the way to go? Could someone shed some more light on this subject with the...
  6. willeng

    Tyre contact patch vs Spring rates

    If we have a large tyre contact patch due to the use of wide tyres & then we change to a narrower tyre with a smaller contact patch, do we assume that we will have to go to a softer spring rate to achieve around the same level of grip as the wider tyre??? I am aware of the many variables...
  7. willeng

    Brake setup??

    We have a car in that has 4 wheel disc brakes, 4 spot AP race calipers on the front & AP single spot race calipers on the rear. On further inspection it has dual master cylinders & a brake balance bar fitted, it has only the front brakes being boosted by a remote booster & is impossible to brake...
  8. willeng

    CS 1030 burst failure

    Could somebody inform me of the maximum tip velocity, (Peripheral Speed)in meters/sec of CS 1030 Bright steel, it is an Australian grade steel. I need to make sure it is suitable for the intended application & i don't want to exceed the burst failure limit. How does heat have an affect on...
  9. willeng

    Piston crowns

    I need to test piston crown shapes for better efficiency is there any substance that will handle the combustion temperatures,pressures for short term experimentation purposes, EG a few quick dyno runs. I am after something that can be reshaped & renewed quickly...
  10. willeng

    Piston acceleration---again!

    Could somebody give the equation & an ( example ) for piston acceleration vs crank angle. I have made a search & found an equation in another post but i must be suffering from brain fade & just can't get my head around this. Thanks.
  11. willeng

    Laminar vs Orifice

    Most common manufactured & self built flow benches are of orifice design, including mine. Can someone put me in the picture regarding Laminar Element flowbenches. I would like to try one to compare the differences. What are the design considerations. What can you make the laminar element out of...
  12. willeng

    Pumping loss & Friction Calculations

    If we spin an engine at 2000 rpm-without ignition what are the easiest methods of getting figures for pumping losses & friction. Preferably without electronic gizmo's. What are the calculations for above.
  13. willeng

    Sierra rod journals

    Can anyone give me the correct dia of the (Ford Sierra) crank rod journals std & the big-end bore dia of the conrods. Also make & part numbers of suitable high performance big end bearings. Any help with this would be appreciated.
  14. willeng

    SPRING FREQUENCY

    We have come across some suspension guys who bounce cars up & down for 1 min,shocks,sway-bars etc disconnected to get a spring frequencey figure. They say they are getting cycles per min of different rate springs. They are using this as a basis for setting up there suspensions. Is there someone...
  15. willeng

    counter weight calculations for crankshafts

    We need help with calculating counter weight sizes & shapes for steel billet crankshafts. Are there any formula's available for calculating this for 4,6 & 8 cylinder race engines any help would be greatly appreciated.
  16. willeng

    CRANKSHAFT MACHINING

    Can any body advise us on what is the best setup to use for turning billet crankshafts on an old lathe. Eg what fixtures to use in chuck & tailstock to get correct offsets for crankpins quickly & accurately. What was used years ago. Are there any sites or books on the subject of machining...
  17. willeng

    detonation problems

    We have a race engine that is confusing us all. It has 10.8 comp runs on avgas with total ignition of 34 deg this engine is wining some races & up the pointy end in all the others. The major concerne is that it is showing signs of detonation on the plugs,eg glossy beads, black pepper spots & the...

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