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  • Users: EfiOz
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  1. EfiOz

    oversteer measurement formula in Motec i2

    I have used it and it's pretty rough and ready. This formula is almost unworkable in a V8 Supercar touring car (low aero, big slip angles) but almost works in a reasonably responsive open wheeler. It will give a very rough guide to US/OS balance but it's so rought that any driver will be...
  2. EfiOz

    programmable intelligent power control systems?

    OBR's unit is the best on the market but the price is up there. I'm not aware of any cars using this technology but I'll have a look out from now on.
  3. EfiOz

    How to work in Formula1?

    A word of warning. It is nowhere near as glamorous as you might think. If working 100 hours a week in a cubicle blows your skirt up then be my guest. As an engine guy, your design is severely hampered by the aero guys who rule the roost when it comes to laying down a new genesis. And don't even...
  4. EfiOz

    EFI algorithms

    I'm in the process of writing one as we speak but until then http://www.compsystems.com.au/Services/training.htm
  5. EfiOz

    Fuel stand-off - intake reversion - what are the causes?

    Does this engine have a hydraulic lash adjuster system? Sorry but I can't find it mentioned anywhere. Lifter pump up could explain it, especially with it getting worse with more rpm.
  6. EfiOz

    Dual Spring Rate Coilovers

    Yes, I've run a dual spring arrangement in F3 and GT cars for 3-4 years now. I usually make up an length adjustable collar so you can change the lockout point for the secondary spring. There was an article in Racecar Engineering some time ago about it.
  7. EfiOz

    ECU ignition timing

    Which Weber ECU is it? If it's the IAW M5.9 then theres a fully programmable replacement one available.
  8. EfiOz

    Looking for a V spray injector

    Magneti Marelli also make twin spray "Pico" style injectors that have stainless steel bodies.
  9. EfiOz

    Magneto-Rheological shocks

    How fast is the response time of the fluid? It sounds like a great idea and could be really good dependent on my question above.
  10. EfiOz

    multi-hole injectors

    Numerous late model cars use what Bosch call the new EV6 style injector. There's the 996 GT3 Porsche injector that moves 41lb@100%. I'll look into the list when I get to work tomorrow. Or you can download this catalogue http://www.compsystems.com.au/CatalogueApplication.htm it has a few pages...
  11. EfiOz

    E85 Stoichiometric and o2 readings

    For this reason we never refer to AFR numbers, only ever lambda.
  12. EfiOz

    Automotive Electronics - How to cut fuel injectors, for TC Project

    I think you'd be much better off trying to interupt the ignition commands anyway. TC runing on a fuel cut is not ideal as the torque reduction is not immediate.
  13. EfiOz

    Super short runners for high boost?

    I know that shorter runners and manifold do wonders for turbo lag.
  14. EfiOz

    Supercharger vs. Turbocharger

    Has anyone ever done a compound supercharged engine? I know Cosworth did one back in the 80's but it never saw a race track.
  15. EfiOz

    Changing a Saginaw Pump to Electric?

    The Lamborghini Diablo we're doing at the moment has a VDO pump from a Mercedes Benz (not sure what model). It's pretty simple setup with a high current power supply and a trigger wire linked to the ignition.
  16. EfiOz

    Increasing Gear Durability

    Try micro finishing (or isotropically finishing) and deburring the gears. Then use a good synthetic like Mobil SHC7590 or Fuchs HLS7590.
  17. EfiOz

    friction reduction in ring and pinion

    I've used these "micro-finishers" or "isotropic-finishes" and they do work. Especially wothwhile as it's fairly inexpensive (and looks cool!). It does reduce the diff temp in a V8Supercar by 8-9C so it must do something.
  18. EfiOz

    Combustion chamber design

    We usually worry more about the piston design than chamber shape with 4 valve engines like that.

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