Car engines create a great deal of energy by burning petrol or diesel. Some of this energy is used to move the vehicle forward around one thirdthe other two thirds of the energy produced is converted to heat. Around half of this heat goes out of the exhaust, whilst the remaining heat remains inside the engine block.
Link to Brickboard Thread of subject of tach: Of note is that the MG version of the Tach is packaged in a bayonet case which can be opened relatively simply hardened rubber O'Ring not withstanding to work on the internals.
In the Volvo version, the chrome bezel is permanently swaged-on, needing to be bent back carefully to allow disassembly. I see no changes or updates to their site in years, so I don't know if they are still active I have sent an e-mail inquiry Update: I have spoken with Roger D operator of the site who says that he is keeping the site up, but is winding the site down.
Model info from this site: The remote module is NLA, so many of the first generation Tachometers have been replaced by second generation type, because the form of the gauge part in the dashboard is the same. Both are still subject of age related problems described here.
Ignition pulse sensing and meter driving circuitry is integrated in gauge. See also Reference Information: Nisonger Instruments in New York. He has been working on Tachs for a long time and in my discussions with him, it was clear that he certainly knows his stuff!
C2 always needs replacement, but with 0. Indeed, some variations in the installed component values of C2 and R3 even occur from the factory, but when replaced with these values, the Tach circuit still operates as designed and within a calibrateable range. The Thermister T crumbles into nothingness, resembling rust, all on its own, resulting in loss of temperature compensation.
I have asked him to supply more detailed info as to resistance value and temperature coefficient so that I can possibly cross-reference other components. He does not agree with me that the calibration pot is a major source of problems, and should be replaced.
He feels the number one source of problems is the C2. Result is somewhat indecisive!
I can only speculate as to the cause of the generosity of the pre-repaired Tiger tach. The tach is a one-shot whose time constant is determined by the main timing cap and the calibration pot and the series resistor. The only thing that could increase the one-shot pulse would be if the capacitance increased as the main timing cap aged.
The calibration was not a straight line, but an arc with the old cap, so it appears to also be frequency related.The hoses arrived really fast and the price was so much less than the Land Rover one I was a little skeptical.
The install wasn't that difficult except I switched the clamps to worm clamps, so much easier and saves so many headaches. Maybe you’ve taken your car in for some recent service and the mechanic let you know you needed a cooling system flush. Or perhaps you noticed your vehicle was a little low on coolant and when you went to top it off you noticed some gunk floating in the overflow tank or radiator.
James Patterson Smith is sadist who systematically tortured his year-old girlfriend for up to a month before drowning her in the bath in England.
Smith's Tachometer Information and Notes 9/ Revisions ongoing, R. Kwas.
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