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  1. BrianPetersen

    wheel time hole sizes

    Having just done the winter-tire swap on my car (GM), it has M14 studs also, and I just ran downstairs to check. The aftermarket wheels and matched wheel nuts (not OEM) have a conical interface and the holes in the wheels are 14.8mm diameter, which is what one would expect for M14 fasteners to...
  2. BrianPetersen

    wheel time hole sizes

    It would sure help us in the rest of the world if we knew what sort of trailer this is, where the wheels came from, where the axle came from, where the nuts came from, whether the wheels are the correct ones to be used on that axle, whether the nuts are the correct ones to use with those wheels...
  3. BrianPetersen

    BEV adoption rates and factors that enhance or detract

    All modern cars have bespoke headlight and taillight assemblies. This isn't an EV issue, it's a "modern cars" issue.
  4. BrianPetersen

    Layoffs 2024-2025 ??

    Fiat 500e is roughly the same size as a BYD Seagull, and does decently in Euro NCAP. https://cdn.euroncap.com/media/66921/euroncap-2021-fiat-500e-datasheet.pdf Obviously it is not the same car, but it's about the same size and weight (the Fiat is a little smaller), and the Fiat 500e is sold in...
  5. BrianPetersen

    Layoffs 2024-2025 ??

    The BYD Seagull is not (yet) sold in Australia and hasn't been tested (or perhaps it has, but results are not yet published), but all of its companion models including the marginally-bigger Dolphin have been tested, and have good NCAP ratings (5 stars). Testing within China to their own...
  6. BrianPetersen

    Layoffs 2024-2025 ??

    "EVs have fewer parts so less to integrate and test." Well, I wouldn't say "fewer", just "different". The motor is simpler than an engine, the gear-reducer is simpler than a transmission, there's no exhaust system or fuel system, but the battery and electronic controls and thermal management...
  7. BrianPetersen

    Layoffs 2024-2025 ??

    My crystal ball is cloudy, but I see layoffs ahead in almost anything that involves manufacturing and retailing, and unskilled jobs in USA going unfilled in most any outdoor work ... and gruntguru has a fair point about hospitality, as well. I'm happy to be retired, but it doesn't mean I don't...
  8. BrianPetersen

    Tesla Cybercab reveal

    For a couple of years, no. Didn't need one for day-to-day living within Toronto. Only a third of Parisians own a car. https://reasonstobecheerful.world/cars-are-vanishing-from-paris/
  9. BrianPetersen

    Tesla Cybercab reveal

    Sure. Back when I lived and worked in Toronto, I used it all the time. Loads of people of all walks of life do. And Toronto's transit system is not great by international standards. Plenty of people in European cities don't own a car. Don't need one.
  10. BrianPetersen

    Tesla Cybercab reveal

    TugboatEng, clearly you haven't travelled much in cities that have good mass transit! Trains get huge numbers of people from one place to another at once. It's absurd to think of a train "making a left turn" because they don't do that (unless the rails guide them left). Trains don't have to...
  11. BrianPetersen

    Tesla Cybercab reveal

    I doubt if their "full self driving" is any further developed than what's currently seen on their production vehicles that are so equipped, and if that's the situation, they're orders of magnitude away from getting the number of "interventions" down to where it needs to be. This event happened...
  12. BrianPetersen

    Tesla Cybercab reveal

    Cities need mass transit that replaces individual cars, whether self-driving or not, not the other way 'round. Perhaps there's something to be said for small regional shuttle-buses with no fixed route to get people from outside the mass-transit coverage area to the nearest train or bus station...
  13. BrianPetersen

    Valve Guide lubrication (rate)

    Agree: Modernize both the valve guide and the valve itself in terms of material selection and tolerances. I would seek out the advice of a good valve manufacturer and, if possible, buy both the guides and the valves from the same supplier. Make sure the valve seat and guide machining is...
  14. BrianPetersen

    Master cylinder repair

    A google search finds that these parts are readily available. https://raceandrally.com/cp7854-cp7855-repair-kits Not worth trying to re-engineer. Bear in mind that the cost of substituting parts in a safety-critical system is not just one of money but also of risk, and at the price of this...
  15. BrianPetersen

    Valve Guide lubrication (rate)

    waross - ... and this engine would have been designed before unleaded petrol. Seems hard to find much information on whether anything is needed on the older Royal Enfield engines to accommodate this. Any search of the internet seems to only turn up information on the new ones...
  16. BrianPetersen

    Valve Guide lubrication (rate)

    OK. I have no specific knowledge of that particular engine. All my stuff (that's running) is Japanese DOHC 4-valve-per-cylinder liquid-cooled and with shim-under-bucket valve actuation that is geometrically impossible to side-load the valve stems. So, generalities ... Bear in mind that in a...
  17. BrianPetersen

    Valve Guide lubrication (rate)

    "25cc at 3000 rpm" is not a flow rate. 25cc over what period of time? I'm not going to make the ASSumption that it's over the same period of time as the crank makes 3000 revolutions. So, there's that ... What's the bike, and where are you located? Many of the older British bikes retain a decent...
  18. BrianPetersen

    Desired front/rear brake balance - per GM early 1960s

    Nowadays, ABS mostly renders all this obsolete. There will be a front-rear balance applied just like in the old days (determined by relative piston sizes front and rear, with the same hydraulic pressure applied throughout) but if ABS or ESP or EDL (electronic differential lock!) determine that...
  19. BrianPetersen

    Desired front/rear brake balance - per GM early 1960s

    It says in the article that the wheel cylinders were different diameters. GM knew a thing or two about brake balance, even back then. I don't think proportioning valves were in use in that era, so it would have had fixed front-rear brake balance, picked at a certain representative deceleration...
  20. BrianPetersen

    Desired front/rear brake balance - per GM early 1960s

    Yeah, when you are talking about 4 wheel drum brakes, whatever braking you got was probably plus or minus 50 percent anyhow. I recall reading a review of one particular car with 4 wheel drums, and the complaint was that the two wheels on the (I think) left side would lock first in their braking...

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