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Felix

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Posts posted by Felix

  1. do you know what the normal pattern on a occiloscope of a oxgen sensor looks like? of course its a zig zag pattern, thats the sensor cycling from rich to lean! did you see what the fuel ratio was when going into and away from said wind??

     

    Maybe if the O2 sensor is hooked up to an efi motor while it is in closed loop mode. You do realise a carbed car is analogue, and in this case the O2 sensor is used for monitoring purposes only...

     

    As for his mixtures altering with differing wind directions, have you ever heard of the ram air effect? I'd say altezzaclub is experiencing a form of this. The headlight is causing a shrouding effect dependent on wind direction, which is reducing intake pressure.

     

    For someone trying to exude knowledge, your replies in this thread seem to express the total opposite. Who really cares what you've done, this thread isn't about you. Consider either pulling your head in or taking an extended holiday from this forum.

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  2. Ah it was your pic I borrowed. :)

     

    I'm not sure about lumpy, hard to really see, but it certainly has some lift.

     

    I'd advise you check your lifter preload like philbey described in a previous post in this thread, and put the results up here. From there we can work out if you need to correct anything.

  3. Maybe, but I'd say that would be a rarity unless the cam was a new billet (or hard welded) and not a regrind.

     

    Look at the following reground cam compared to a stock one. Note the massive reduction in the base circle to gain additional lift.

     

    post-4435-011220600%201288769661.jpg

     

    The lifter would drop down the block a fair bit reducing preload, needing the base of the rocker pedestals to be shaved. Obviously a shaved head would help close the gap, but I don't think anyone is going to be shaving a head by that much.

  4. This ones for felix, do you know what the CR and CC volume of your 5k is?

     

    Cheers

     

    I can't remember the CC volume as the motor was put together 6 years or so ago. It ended up around 9.6:1 as I set it up for 95 octane.

     

    As for shimming up rocker pedestals... Why? Normally when you regrind a cam the base circle is reduced to get extra lift, so if anything you need to shave the base of the rocker pedestals to regain lifter preload.

  5. I do have solids in my 5k, but they didn't cost me a single cent. :cool: Gutted 5k hydraulics with 3k pushrods and 4k rocker gear. Done about 60 thousand kays without an issue. Makes me laugh when not so smart people spend up for a solid lifter conversion.

     

    I wouldn't bother if it actually cost money... it is a K series after all, the simplest of the simplest of motors.

  6. just had a quick read through all this, with a electronic dissy running the std coil, is the ballast required?

     

     

    ballast resistor drops the voltage at cranking (something like that) to 8v for better starting?

     

     

    Ballast resistor drops voltage to coil when running to preserve points. At startup the resistor is bypassed so coil receives full battery voltage.

  7. As for the curve, I do want to get an MSD programmable anyway, so it'll be lock time anyway.

     

    No worries. Sounds like a good plan.

     

    Something you may find of interest from a bit of a quick test with one of those spark tester tools at idle:

     

    5k electronic dizzy with Bosch black transistor coil. 30,000 volts.

    4k Scorcher Bosch recurved dizzy with Jaycar HEI kit and Echlin GX80 coil. 25,000 volts.

  8. Why don't you run one of those black transistor coils for higher voltage? That is what I had before I sold off my 5k electronic dizzy and coil that was on the ke16. The 5k leccy dizzys advance curve isn't the best, unless you get it recurved. Car went much better afterwards with a points dizzy.

     

    I've had one of those GT40 can style coils burn out before after a couple of years. It was a resistor type, running a resistor... not a fan. The Echlin GX80's are better in my experience.

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