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  1. lugnuts67

    Which one of these coils would you choose for racing

    It's not just the coil either - you may want to consider two sets of plugs - one for street and one for strip - because of the heat range and rpm that the engine will experience.
  2. lugnuts67

    E85 in my lawn Equipment?

    Check out this post on a traditional Pontiac site http://hardcorepontiacs.com/forum/169-e85-report.html He converted to E85 and is lovin it. There is a local guy that has done the same and likes it's performance in his drag car for the last year and a half. As always, it is not as good or as...
  3. lugnuts67

    Highest Compression Ratio for E85

    there is less energy in E85 than an equal amount of gasoline. period. However, because you can run higher compression ratios, you can achieve higher cylinder pressures and produce high HP. You need a good bit more juice though. A pontiac guy here in the south converted his supercharged drag...
  4. lugnuts67

    Flow Setters versus Pressure Reduction

    do you think the backpressures are all the same? are the distances the same with identical piping, fittings etc? Pressure and flow are related but there are many other variables to consider.
  5. lugnuts67

    Machining aluminum

    have the program set up to run 12passes to make it thorugh 3/4" plate. Thats 0.0625" bite each pass. Is that too much? I cannot get the ME Consultatnt to download - it keeps saying that the Bellsouth serever for that address is not avaliable.
  6. lugnuts67

    Calculating pressure drop across Valve

    What type of valve is it and can the manufacturer supply you with a table on the Cv of that valve by % open or degrees of rotation? Then you could plug it into the simplified sizing equation.
  7. lugnuts67

    Machining aluminum

    Unfortunately the machine's instructions are in Mandarin Chinese. I spoke with the rep and they said that rough translation was to follow the tooling manufacturers speed and feed rates - this has not been successful. I have had a number of people suggest the 3 flute mills but the manufacturers...
  8. lugnuts67

    Machining aluminum

    Will check and advise. Thanks for the new perspective.
  9. lugnuts67

    Machining aluminum

    Please advise any information on milling T6061 aluminum. I have tried O-flute, 2-flute, 3-flute and 4-flute (in high speed steel and carbide) at speeds from 2500rpm to 17Krpm and feed rates from 20 inches/min to 75 inches/min without coolant, with compressed air, with a mister and flooding it...
  10. lugnuts67

    Thread engagement length question

    A fastener works like a coil spring. As you tighten the bolt or nut on a stud, it will stretch and generate a clamping load. The key to correct tightening of the fastener is to tighten it until it is just slightly less that the fasteners elastic limit. To do it dead on you must identify the...
  11. lugnuts67

    Vacuum Breaker

    Thermostatic traps are excellent air vents - both Watson McDaniel and Spirax Sarco make a couple different flavors designed specifically for use as air vents. As far as vacuum breakers go, determine the CFM requirements and then the cheapest solution is to install a light seat pressure spring...
  12. lugnuts67

    Have you seen?

    Thanks patprimmer. There were several good points there both pro and con. What I did not see mentioned though was the ceramic-composite bearings and sealing surface. I too have some reliability concerns about a 14,500rpm small block Ford because of rotating mass but the lubrication would...
  13. lugnuts67

    Insulation of Car Exhaust

    Finned aluminum cat back exhaust? Hmmmm... Watch out for speed bumps! Hehe. You would also have an oxidation problem with the tubes. Thin wall would not likely last long with the heat and moisture. It would be a bit extreme and makes sense but I doubt you would get any degree of measurable...
  14. lugnuts67

    Torque plate twist

    I guess another question would be, why are torque plates typically made of steel? Aluminum would be much lighter and easier to move around. The question of oxidizing then comes up but would it not be a factor with steel as well? Both would need to be surface trued from time to time because of...
  15. lugnuts67

    Have you seen?

    I had been contemplating the limiting factor for the modern internal combustion engine and came to the conclusion that it is the valve design. Then I started to sketch out a rotating barstock system with ports cut into it and looked around on the net for similar ideas. Has anyone else looked...
  16. lugnuts67

    Torque plate twist

    Just a question. I was wondering if an aluminum torque plate should be used if you are going to use aluminum heads - I know they don't but should they? It seems that if the torque plate is to simulate the distortion of the block when the head is properly torqued down so that the cylinder is as...
  17. lugnuts67

    Insulation of Car Exhaust

    There is some good information for you above about scavenging, flow calculations, trade offs etc. You need to decide exactly how far you want to go. No, the engineers are not stupid but they are forced to operate on a budget and inside the space given. On many cars the exhaust system is...

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