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  • Users: NickB
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  1. NickB

    68hc11

    88-94 and some 95 Chrysler engine computers used 6811's. Many GM's have too, but i don't know years.
  2. NickB

    Diameter of splined shaft

    None. Make sure the transition between the diameters isn't a square corner. A taper or radii is best. Are you sure that diameter spec isn't just for the OD of the spline section?
  3. NickB

    Turbo rotational speed sensor/meter

    The Grand National has a boost pressure gauge, as do many turbocharged cars. It's not a shaft speed indicator.
  4. NickB

    Turbo rotational speed sensor/meter

    Yeah, i just figured it would be easier to understand the difficulty in putting a magnet in there, and not worry about trying to explain magnetc flux
  5. NickB

    Turbo rotational speed sensor/meter

    Hall effect sensors sense the presence of a magnetic field. They work great for crank and cam sensors, as yo can easily embed a small magnet in the flywheel, or elsewhere on the engine. I see that as being VERY difficult to do with an aluminum compressor wheel spinning at 150000+rpm.
  6. NickB

    At what slope does a car door no longer hold itself open?

    I think traction in the winter is more important than the doors closing from the slope. My driveway is pretty steep, and even though the doors stay open for the most part, there's days in the winter i can't park on it, or slide down it while walking to the car.
  7. NickB

    At what slope does a car door no longer hold itself open?

    I had a lot of really REALLY simple tech support questions this morning, and i guess that coloured my post a little :)
  8. NickB

    At what slope does a car door no longer hold itself open?

    1) Rent a flatbed tow truck on wednsday. 2) Put everyones car in the parking lot on it one at a time, and measure the angle at which the door closes as the truck bed is tilted up. Do it a few times for each car, using all the doors. 3) Show your boss your results on thursday.
  9. NickB

    Turbo rotational speed sensor/meter

    The contrast of the light/dark reflections won't be very great, and you could have a hard time counting them at high speed, as some phototransistors can be pretty slow. Make sure you get a good fast one. Another option would be to drill a small (1/8") hole right through the whole housing...
  10. NickB

    Turbine and Compressor maps, where to find it?

    oops... http://www.stealth316.com/2-turboguide.htm
  11. NickB

    Turbine and Compressor maps, where to find it?

    The turbonetics site is great for maps. This site is an upgrade guide for the 3000GT twin turbo, and has compressor maps for a lot of Mitsubishi (MHI) turbos.
  12. NickB

    Turbine and Compressor maps, where to find it?

    I know the way the turbines are defined with trim numbers, i was just hoping there were some quantitative numbers for flow and pressure like the compressors. It would make turbine selection easier. I can pick the right compressor, but turbine selection is more of a "this works in this car...
  13. NickB

    Turbine and Compressor maps, where to find it?

    Is there even a map for the turbine wheels? I've found many maps for Garrett and MHI turbos, but never any information on the turbine wheels, besides diameters. Is there a simple way like a compressor map to describe the performance of the turbine? Is there any source for those that anyone is...
  14. NickB

    duty cycle of solenoid valves?

    Applying 12V will make it switch. Applying a PWM of around 50-100Hz and varying the duty cycle from 0 to 100% will approximate 0 to 100% open or closed.
  15. NickB

    TD06-20G Exhaust Housing

    Ok, i just checked their site, and on the installation acessories, it says that it's a T3 flange. The turbine outlet flange is 3-bolt.
  16. NickB

    TD06-20G Exhaust Housing

    THat's interesting, especially since all the pictures they show on their website show their super turbo series to use a standard Garrett T3 flange. I can't remmeber where i read that it is a T3 flange, but i do know it is. Welding the wastegate closed is a very simple operation.
  17. NickB

    TD06-20G Exhaust Housing

    www.hahnracecraft.com
  18. NickB

    variable advance for crankshaft sensor?

    If you move the sensor so the trigger angle is around 50 degrees BTDC, then it will only be a delay of 10-40 degrees, and not 350.
  19. NickB

    V-Twin and V-4 motors

    Posted by Greg Locock: Incidentally an I4 does not sound like half a V8, at least to my ears. In most cases i agree, but my Talon (2.0L I4 turbo) has a big lumpy cam, a 3" exhaust, and when it's idling just a touch lean, it sounds like a mercruiser 350 exhausting underwater :) It doesn't...
  20. NickB

    What's the significance of the 4 ball wear test to oil performance?

    I think he's saying they engineer the tests so that only their products pass it.

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