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john.r.davies

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About john.r.davies

  • Birthday 04/01/1947

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    john.r.davies@btinternet.com

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  • Location
    Lancaster UK
  • Cars Owned:
    Race Vitesse (last in UK), GT40 kit car in construction, Peugeot 208 GTE, TRansit Mk6 race truck

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  1. There seems to be some misunderstanding above about how an "extractor" manifold works! It relies on the nature of a six cylinder engine, which is two three-cylinder engines joined as mirror images of each other. An Extractor links the cylinders that fire just 360 degrees apart, as said above 6 & 1, 5&2, 4&3. The pulse of exhaust gases from one of the pair reaches the junction and is reflected up the other branch. If the length of the Primary is correct, then this reflected wave will reach the other port just as that opens, in the negative phase of the pulse wave. The
  2. You mean a 6-3-1 manifold? The criterion is the length of the primaries, which governs the rev range in which they resonate and act as extractors. Like organ pipes, the shorter the higher. Gareth Thomas, a strange man and an excellent engineer, recommends that they should be 0.43m long and exactly equal to work around top revs: They need to be longer to work at mid range, but those would need to be bespoke and will take up a lot of space or have ground clearance problems. John
  3. Yes, some time ago, after using araldite to mend a leak I blocked the tube!
  4. Have you an infrared 'gun'? Not pricey. Scan that across the warmed up radiator ans look for blocked tubes that will be cooler. John
  5. I have one that has two cigar outlets, and two USBs. You can have three outlets of each. Or, one that has FIVE USBs!
  6. And the results were..... As shown, there were a LOT of DNFs, including me, I'm sorry to say. A loud knock and loss of power led me to retire after only my second lap. Turns out that a bent push rod had caused another to go walkabout, hitting the rocker cover every other revolution! Hope you're happy with your result, Roy. Given the conditions, wet, cold track, I was with my practice time. The forecast was right about "cold"! That's not window glass, it's hail! John
  7. Many (most?) sat navs will run off a USB port, and such can be linked to a USB 'bus' that will allow more than one device to be run. On my TRansit I have a satnav, a tyre pressure monitor and it charges my phone! AND, you can find USB ports that include a Voltmeter, so you can monitor the battery health as well! EG: https://www.amazon.co.uk/Charge-Charger-Aluminum-Voltmeter-Motorcycle/dp/B07NV7579D/ref=asc_df_B07NV7579D/?tag=googshopuk-21&linkCode=df0&hvadid=218223787868&hvpos=&hvnetw=g&hvrand=2633413064086687142&hvpone=&hvptwo=&hvqmt=&hvdev=c&h
  8. This happened to me last week. Ambulance with Blues & Twos could be clearly heard approaching, so not just for the red light. I was at the front and was the only driver to move forwards cautiously to let it though. Although it was two cars behind me, no one else shifted. Fortunately, the lights changed shortly and it 'proceeded'. I had no qualms about being victimised by a traffic camera, as the Ambulance Service would have records of its vehicles' 'shouts', an d their urgency, as would the Fire Service. That would be less likely for a Police vehicle, unless it had the Blues &
  9. That eruption has died down now. But it was most spectacular! Look on YouTube for a real time episode from AndreB (e acute accent)! It just burst from the earth, and develops into an enormous fire fountain in seconds. John
  10. All, I hope to be out at Donington with the CSCC that weekend. Forecast is hopeful, dry and some sun, but cold. Two TRs, Graham Wilson and Roy Chamberlain in my grid (Swinging 60s Race 2), with a Spitfire in Race one. Practice at 1055, Race at 1540. I have some spare tickets if you like to PM me. John
  11. TR Rob, All we need is another to repeat what RobH and I have said, and we have a Snark! ("What I tell you three times is true!")
  12. With respect, ChrysW, there is nothing worse for a TR PI engine than infrequent use, while starting and running it more often. Sooted plugs and clogged injectors are the result, as Andy has indicated. Spring is here! Time to get it out on the road! Next year, bed it down for the winter in a nice, well ventilated garage, with some fuel stabiliser in the tank and run through the engine, tyres over inflated (with a note on them to re-adjust next spring) and fully antifrozen . Leave it alone until the Spring! Have a good time! John
  13. Rob, Do you have a "pre-engaged" starter, AKA "Hi-Torque" - it doesn't look like OE equipment. Easy to tell,.t not from the angle of your photo, but the extra wires from the main starter terminal are a clue. A pre-engaged has a second, cylinder on top of (or below) the main motor cylinder, like this, from Rimmer's catalogue: The second cylinder is a servo, that throws the starter pinion at the flywheel gear ring to engage. Only after that has happened will the servo connect the starter motor, so if the servo fails (dull click) will the motor turn. If you ha
  14. But French Racing Blue, Blue de France, is a specific shade, with a "Hex triplet" which seems to be an industry identifier, of its own, #318CE7! So does Italian Rosso red (#D40000), but I suppose that German silver isn't a colour, just the appearance of sanded aluminium! John
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