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  • Users: kenre
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  1. kenre

    plastic for casting pattern

    What are the best choices for a machinable plastic for use as a casting pattern, used in sand castings.? Wood is commom, but i would like something that is a little more robust. www.retallickeng.com.au Was told it couldnt be done, so i went and did it!
  2. kenre

    Hard Anodising galling

    If i hard anodize a small eg, 3/4 inch barrel and also the housing it rotates in, will they be prone to galling? same alloys. Fit is not critical, as long as there free to turn easily. Will be subject to vibration and fuel oil mixture. www.retallickeng.com.au Was told it couldnt be done, so...
  3. kenre

    Neo Oils

    Is Neo still about? The last web address i was given is no longer working. Mainly interested in tech info on the Big Red 2 stroke oil. www.retallickeng.com.au Was told it couldnt be done, so i went and did it!
  4. kenre

    current limiting

    I once had a circuit diagram for adjustable current limiting using a ua 741 and 2n3055 pass transistors. No longer to be found. Anyone have a similar one? its to limit up to 30 amp. www.retallickeng.com.au Was told it couldnt be done, so i went and did it!
  5. kenre

    Nitrided H13

    Im after some specs on nitrided H13 tool steel, namely die Ejector pins. My supplier cant help, and matweb hasnt been much use. Would like to know approx depth and hardness of the nitrided layer, tensile strength core hardness etc. Im mainly using 3/16, 1/4 and 7mm Dia...
  6. kenre

    Al Casting alloys

    Im after info on available aluminium casting alloys in Australia. Google hasnt been of much use, Sims metals have given 4 alloys, but no data sheets or specifications. I need to choose an alloy for model racing engine crankcases. Strength, Stability, and crack resistance are high...
  7. kenre

    steel choice

    I an designing a small high performance 2 stroke engine. For reliability and longevity reasons i will be using a steel bearing housing in place of the cast alloy housing normally used, less thermal expansion and higher stiffness to ensure greater life of the bearings. Full hard O1 steel can be...
  8. kenre

    cooling system hose routing

    I Must be missing something obvious here. Small Block Chev, the original design, not the newer ones. Aftermarket manifold with outlets both sides at the rear as well as the front. An outlet on the top of the standard water pump. What is the best way to run the hoses for the heater and LPG...
  9. kenre

    More Top Fuel..

    Found this info, interesting! At top engine speed, the exhaust gases escaping from the open headers produce about 800 pounds-force (3.6 kilonewtons) of downforce. *The engine will consume as much as 22.75 gallons of fuel during warmup, burnout, staging, and the quarter-mile run. *Compression...
  10. kenre

    S7 heat treatment

    I have been told i need to heat treat S7 tool steel in a stainless bag to avoid de-carburisation. If the bag is sealed, wouldnt it pop from pressure buildup? of is this not an issue. I need to harden, then, temper to 58/60 Rc. Also, where can i locate bags in Australia? Ken
  11. kenre

    switchmode PS rating

    On a standard computer switchmode Ps i have, it is rated at 30A @ 5V, 25A @ 12V... etc. are these ratings total Eg, 30A Max at 5V, with nothing on the other voltages, or can it supply 30A @ 5V, AND 25A @ 12V simultaneously ? Ken
  12. kenre

    casting of 17/4PH

    I often investment cast bronze, but customer demand is asking for 17/4PH, strong when heat treated, and holds a sharp edge well. Not having any luck finding info on casting of this metal. Any help appreciated. Ken
  13. kenre

    lpg convertor

    I have searched here to no avail, as i know it was poted here once before. Impco LPG convertors have an arrow for orientation, what is the reason for this? i want to fit one and the neatest way is unfortunatly arrow down. Ken
  14. kenre

    C-350 source

    Looking for a source to purchase C-350 Maraging steel in Australia. Thanks, Ken
  15. kenre

    phos bronze id

    IS there a simple test that can be done to distinguish between brass and phos bronze? i have a part that may be phos bronze, but would like to know for sure. Ken
  16. kenre

    honeywell controller

    I have an old Honeywell UDC2000 Minicontroller. So far all attempts to locate a user manual have failed. Anyone here able to help? something online would be ideal! Ken
  17. kenre

    heat treatment oil

    Hello, Im currently machining some model racing engine crankshafts out of 9310 (en36A) I wont need to carburise or nitride the first few but will want to heat treat to increase the properties. I have the heat treat specs for this alloy, but am after info on the best 'oil' to quench. Im...
  18. kenre

    Car trailer aerodynamics

    I need to build a new trailer to cart my race things round the country. Size will be approx 1700mm high from ground, 1800 wide, 3500mm from drawbar to tailgate. single axle. Fully enclosed with front section sloping down and in towards drawbar. Im looking for simple ideas to reduce aero...
  19. kenre

    Nitriding v Carburizing

    I need to machine and harden some small 2 stroke engine crankshafts. Used in very high stress and rpm conditions. Which is the better option for this? material choice can be made to suit. Shafts will run in normal c3 clearance ball bearings. Ken
  20. kenre

    Sanden 090 compressor orientation

    Im fitting a sanden 090 air comp comoressor to a small block chev. These are a scroll type unit, and im hoping a good one too. Not seeing any marking 'saying this way' etc i was going to mount it with the ports on the topside. Any other info on these compressors would be helpful. Cheers, Ken

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