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Recent content by bigTomHanks

  1. bigTomHanks

    Help me get these studs out

    I had some studs that were similar to the one you pulled out and none of the usual methods were working(impact, heat, welded nut, drilling, penetrating oil, wax, hammering stud,etc). What finally worked was cutting the stud off and use a grinder to get it slightly below the surface. I then used...
  2. bigTomHanks

    Automotive paint question

    You could look at a sample of your paint using a microscope and from experience you could start to tell which are good and which could potentially give you problems. Some people use a "sealer" coat of primer which is just a thinner coat that is supposed to reduce the porosity to seal everything...
  3. bigTomHanks

    adhesive materials in BOM?

    At some point somebody is going to have to manage these materials by working with operations to setup a system to ensure the right materials and levels are maintained. The BOM will never contain everything that the workers will need to complete their job but it will enable over 90% of items to...
  4. bigTomHanks

    torque converter sizing

    How do manufacturers size torque converters for a particular vehicle? Do they do a trial and error until they get the characteristics they are looking for or are torque converters given classifications that can be used to size them for a particular vehicle weight, torque, etc? I'm trying to size...
  5. bigTomHanks

    Avoid Job Hopping

    When I am not being fulfilled technically at work I always have a project going on at home. The key here is to spend as little time at work when you are not being fulfilled so you can do what you enjoy, thus not getting burned out. Many times when I am dissatisfied I think about my project at...
  6. bigTomHanks

    KNOCK OUT

    Layout areas. Drill out corners and then use the jig saw with a metal cutting blade to cut out the straight runs.
  7. bigTomHanks

    Sand Casting an air cooled head

    When I see not to use it on leak tight or pressure applications that makes me think that it's a brittle material that is susceptible to hairline cracks and other casting defects. This would result in catastrophic failure which is the worse case scenario and I don't see increasing the material...
  8. bigTomHanks

    Electrical runout in gearboxes

    Never heard of electrical runout but google gave me this paper that seems to explain it and how to control it: http://www.ge-mcs.com/download/orbit-archives/2001-2005/3q2005_runout.pdf
  9. bigTomHanks

    Connecting pulse output to Piezo alarm

    Arduino should be able to handle what you are trying to do. They are about $30 US at radio shack.
  10. bigTomHanks

    Sand Casting an air cooled head

    I wouldn't for the negative reasons that you stated not to mention how things would change in your high heat and vibration application. There are plenty of good materials that meet your application requirement so using one of those from the start would give you a higher chance of success and...
  11. bigTomHanks

    Ideal AFR theory (modern 4cyl engines)

    A good WOT ratio is 11.5. This may not yield maximum power but is very close for many street engines and is fairly safe to run. I would rather run a little rich and add more timing and also have a little better sense of security. If you have access to a dyno then you can start at 11.5 and walk...
  12. bigTomHanks

    Maximum recommended dust moisture for Dust collectors with fabric filters

    Have you considered using a scrubber to extract the zinc? I think that would be much more maintenance friendly if it is an option for your application. http://www.waterleau.com/en/technologies/air/reither-venturi-scubber
  13. bigTomHanks

    Carburetion and jet sizes for restrictor plate racing

    Buy an innovate mtx-l and get exact about it.
  14. bigTomHanks

    Delay Off Circuit

    Thanks to all for the suggestions. I was able to put together a "Power-Off Time Delay Relay" circuit. http://www.bowdenshobbycircuits.info/page2.htm Another solution that would work for my application would be to wire the relay I'm trying to power into the dome light circuit since it stays on...
  15. bigTomHanks

    Delay Off Circuit

    I have an application where I need to power a small automotive relay for 15-30 seconds after cutting off electrical power(12 volts). I thought there was a 555 circuit that could perform this function but cannot find it. If someone knows the name or can provide a link to the circuit that I am...
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