Jump to content


  • Posts

  • Joined

  • Last visited

Everything posted by GrahamB

  1. Acting on a previous recommendation, yesterday I bought four Falken 155*13 tyres for £145 fitted with discount from a local dealer. I think they also produce a 145 width. A lot cheaper than the £80 each previously quoted. They were changed as the previous Michelins, although plenty of tread left, were 15 (!) years old. Only feels like a few years ago that I bought them. So as Pete stated, they will age more than they will wear. New tyres date stamped as December 2020.
  2. I repaired a LED inspection lamp by constructing a battery from two, three rechargeable cell packs designed for analogue telephones. Re-soldered the connections and bound them with PVC tape, half the cost of buying a new lamp. I previously to use an AVO meter (AmpsVoltsOhms) that my father "gifted" himself when he left the RAF in 1948. I now use a digital meter but set to the highest range so that it reads a stable 012 volts rather than 12.34 volts which keeps changing. The last two decimal point may be useful in some electronic engineering context but not when checking whether power is getting to a switch.
  3. Interesting that the Haynes wiring diagram does not show a relay but the owners handbook does show a relay. If a relay is present it is near the ignition coil.
  4. I read several years ago that the parameter which correlation with fuel economy was the weight of the car. I remember watching a small female, probably weighing about 50 kg, the sole occupant, manoeuvring a large 4*4 into a parking space, the vehicle weight must have been 2000kg. The thought at the time was that it was not a very efficient mode of transport.
  5. My 1975 Spitfire 1500 has a relay which is live and actuated by pressing the steering wheel centre which earths the relay coil outlet. I have checked the later wiring diagram for the stalk actuated models and they too have the same relay. It is a special (expensive) relay with only three connectors but you can use a standard four pin device by connecting the two power in connectors together. When the relay is actuated, 12 volts is fed to the two horns which have earth connections to the chassis.
  6. I tackled this task several years ago. The foam had disintegrated but the black vinyl covers were still good so just replaced the foam. I cannot remember any details except it was relatively easy. I secured the covers with black plastic cable ties rather than hog rings as much easier and adjustable but not as neat if you remove the cushions and inspect the underside. Perfectly acceptable when fitted the correct way up in the car.
  7. GrahamB

    Flat EV

    "Powered by a next generation 50kWh lithium-ion battery, Corsa-e can take you up to 209 miles (WLTP)1 on a single charge." Quote from the Vauxhall website. 900 Wh from a solar roof is less than 2% or an extra 4 miles. May not be worth the financial outlay?
  8. I gave up with mine and just fitted a splitpin long enough to bend the end over but short enough not to show. Works fine.
  9. GrahamB

    Flat EV

    According to the Camping and Caravanning Club, all except a rather expensive Jaguar SUV were not approved for towing and even the Jaguar was only for a light weight device. I read that some months ago and at the present rate new models are being introduced, this may no longer be correct.
  10. GrahamB

    Flat EV

    The use of average mileage is very misleading. Now I am retired, my mean journey is about 20 miles, EV no problem. But once every two months, (to resume after restrictions are lifted), we visit my daughter in Mitcham, Surrey, or son in Otley, Yorkshire. This involves return journeys of 250 or 480 miles. Both live in terraced houses with on street parking. As mentioned earlier, you park where you can, not necessarily close to the house. In Mitcham there are three charging points at the end of the road but these are for three roads each with addresses over 70, so about 200 houses. We could spend a couple of hundred pounds and many hours on public transport but each visit is usually accompanied by a request along the lines of "Dad, can you bring your sledge hammer, a spade and your toolbox as we need..." I would quite like an electric vehicle, in my youth I drove an electric milk float but not just yet; the early EV technology is already obsolete. If I buy a new petrol car in five years time a keep it for 15 years, I will be 90 so probably it will no longer be a problem.
  11. I have only removed an overdrive gearbox from a Spitfire, single rail and J type. I had to completely remove the propshaft to get enough clearance to disconnect the input shaft from the clutch. Yes, it is very heavy! I would also recommend cutting the heads of a couple of bolts as suggested by Clive to aid refitting.
  12. I was told that carb cleaner leaves a fine film of oil to protect the metal. Brake cleaner is just degreaser, a film of oil to stop the discs tarnishing is not a good idea!
  13. I am surprised that you could not find an imperial spanner to fit. 7/6" = 11.1 mm. 0.1 mm= 0.004". Perhaps with all the usage your 7/16 spanner has opened up slightly. Or has it been stolen by the crows !
  14. If the coil is too hot to to touch, this is indicative of a coil with a low resistance. If it is 1.5 ohms it must be connected to the ignition switch via the white/pink resistance wire so that it only receives 6 volts during normal running. Has this wire been bypassed to obtain 12 volts for the electronic ignition? If so, then you need a 3 ohm coil. Alternatively, has the feed from the starter solenoid been misconnected so that it supplies 12 volts continuously rather than only when the starter motor is actuated? As for the coil, the extra 0.7 ohms may just be due to the resistance of the test leads. If it is 2.2 ohms it will pass less current and run cooler, and for the same inductance, provide less energy to the ignition system. But the extra resistance could be due to more turns on the primary giving a higher inductance and more energy but at the expense of a longer rise time. After saying all that, I think that the replacement coil will work fine provided it is only being supplied with 6 volts via the resistance wire.
  15. I was told that the manufacturer decided to develop a water dispersant. The first formulation was not upto expectation so they re-formulated and made a second batch. This continued until they were finally satisfied with the formula for the dispersant, on the 40th variation. It was then marketed as WD40. So WD1 to WD39 never went into production.
  16. GrahamB

    Flat EV

    I was attending a conference at University of Bath. During the lunch break, I went for a walk and noticed some strange small vehicles. They were experimental solar powered trolleys and I was asked if I would like a drive. Of course the answer was yes and I trundled slowly along the pathway. Then I passed a tree and the vehicle stopped, the shadow was sufficient to cut the electric power. There used to be a race for solar powered vehicles across the Australian outback, plenty of sun and no trees!
  17. I assisted a friend rebuild a Minor 1000 A series engine. In the bottom of the sump was a locking tab which fits on the main bearing cap and then folds over to lock the bolts. All were in place on the bearing caps and securely in place. The locking tab was perfectly flat so had never been bent. Our guess is that when the engine was originally assembled in the BMC factory, some employee had dropped the tab into the engine, could not see where it had gone so took another one from the tray and continued with the build. On turning the engine the correct way up, the tab fell into the sump and had resided there from when the car rolled off the production line.
  18. I replaced the 16ACR on my Spitfire with an uprated 60 amp alternator from Canley Classics. The replacement looked the same as the original and fitted without any adjustments or modifications. This was some years ago and it has performed without any issues. I realise mine in a 4 cylinder and not a 6 but if your original is a 15ACR, I can see no reason why the uprated alternator would fit a 2000 but you may wish to wait until someone confirms that they are interchangeable. Canley Classics price is £54.
  19. Yes, I was forgetting that the initial field supply would be removed if the alternator plug was disconnected.
  20. I would not recommend running with the alternator unplugged as voltage spikes, normally dampened by the battery, could damage the electronics within the alternator. The alternator produces A/C which is not completely smoothed by the diodes so you will get a ripple on top of the D/C voltage. I have not tried to measure it myself but 0.5V A/C seems quire reasonable. You will only measure any A/C voltage with the engine running as it is produced by the alternator. The dashboard mounted voltmeter in my car, which is not very sensitive, is wired directly to the battery via a relay. It reads 12v with the ignition switched on rising to 14V as soon as the engine starts. I replaced the previous alternator as the voltage only registered 11V with the engine running and the lights on. I fitted a 60 amp Lucas style alternator purchased from Canley Classics. I do not know if they still sell them.
  21. Yes you are correct. The alternator produces an alternating current which passes through a diode pack to supply a direct current to the battery. In the Lucas alternators and others, the diode pack is in the back of the device immediately under the black plastic cover. I once had a Mk1 Fiesta to which I fitted a 4 branch exhaust which came close to the read of the alternator and the extra heat caused the diodes to fail on more than one occasion. Fortunately you could buy just the diode pack in order to repair the alternator.
  22. I have the same issue with my 1975 Spitfire 1500 so perhaps a common occurrence. I just wind the window up until the glass just touches the screen frame then down about 2 mm. When I try to make adjustments to fittings, I usually make things worse but I will be interested if you find a solution.
  23. I do not understand your system. If the battery is capable of starting the engine, if you measure the voltage on the + battery terminal with the engine stopped you should get a steady 12 V or slightly more. This will drop to about 9 V as you crank the engine and rise to about 14 V with the engine running and the alternator operating. If the voltage does not rise above 12 V, the alternator is not functioning. As mentioned previously, the alternator has to be energised by a 12 V supply, via the dashboard ignition light which should be a standard filament bulb. The alternator should not be run without being connected to the battery. With the engine running, there should be a steady 12 V plus to the input to the ballast resistor. As suggested by Pete, if the ballast resistor is fed via the white/pink resistance wire ( K on the wiring diagram indicates pinK), you will get a fluctuating voltage, and hence unsteady reading, at the input to the resistor and very little current through the coil resulting in a weak spark
  24. I concluded that the problem was caused by Triumph just fitting an alternator in place of the earlier dynamo while keeping everything else the same as they already had the bits in stock. I am using multi-electrode spark plugs with a claimed life of 25000 miles and do not need to remove No.1 plug very often so just live with the design issue.
  25. The voltage on a ballasted coil will be 12 V with the ignition unit in the off state (equivalent to points open) falling to 6 V with the unit in the on state (points closed). With the engine running, a digital volt meter will not be able to follow the rapidly changing voltage and will display apparently random numbers. With the ignition on but the engine not running you might be able to get sensible readings by slowly turning the engine over by hand; you certainly can do this with points. I have run a separate 12 volt supply from the ignition switch to the electronics to ensure that the unit always gets a stable voltage.
  • Create New...