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  1. rruff

    How to build your own Carbon Fiber Camper making your own Composite/Foam panels.

    I do. If you really want to use 20 psi Foamular, I'd recommend texturing the surface with a wallpaper perforator. Then work a layer of epoxy into the surface, remove as many bubbles as you can, let it cure for a bit but not hard, then apply your composite layers. This makes the core stronger and...
  2. rruff

    Scout camper feel too heavy?

    I did the analysis based on braking test data from C&D awhile ago on here. A year or two? As I recall, I started with the assumption that both trucks' brakes were just able to skid the tires at GVWR. The Tacoma was over GVWR so I assumed it was brake limited, but it still stopped in a shorter...
  3. rruff

    Scout camper feel too heavy?

    How about this, then. The Tacoma with a 3k lb load will stop faster than a F250 diesel with a 3k lb load... because the F250 is much heavier. True. So getting a bigger truck makes it more dangerous to others. Context is important, and "compared to what?" The real problem is that heavy vehicles...
  4. rruff

    Story done on my 2013 Dream Machine Tacoma!

    Ya, they are loading ok now, so maybe it wasn't you at all! (y)
  5. rruff

    Scout camper feel too heavy?

    What "thinking" results in your judgement? The Tacoma stops quicker and is also much smaller, so how could it be a safety issue? GVWR is not a safety reg or a legal requirement for private use. It's a manufacturer warranty and liability number, based on the bone stock vehicle. I find that hard...
  6. rruff

    Scout camper feel too heavy?

    Regarding the handling, do some sensible shock, spring, and tire upgrades if you'll be hauling a load regularly.
  7. rruff

    Scout camper feel too heavy?

    Someday I'll probably get tired of pointing this out again... but the stopping distance of on road vehicles varies hugely by weight and contact patch assuming good dry pavement. All the big rigs and other trucks and RVs out there who have no qualms about tailgating you, have a long stopping...
  8. rruff

    Story done on my 2013 Dream Machine Tacoma!

    Photos stall for me. I suggest compressing them or making them smaller. Irfanview is a good free app.
  9. rruff

    DC-DC charger as an alternative to generator?

    Is $160 shipped for 1280 Whr not cheap enough?
  10. rruff

    Ram 3500 - Spare tire options for 37s.

    The "factor" you are overlooking is that the rolling circumference change with pressure is actually a tiny modification of "0". You can easily do this experiment yourself if you don't trust the ones that others have done.
  11. rruff

    Ram 3500 - Spare tire options for 37s.

    Here is another one. He got <1% difference between 50 and 10 psi.
  12. rruff

    Ram 3500 - Spare tire options for 37s.

    I'll let you do that experiment! But if the tire isn't slipping on the rim or on the ground, then ya... close to the tread length. I think you'll need to put some air in the tire though, to satisfy those criteria. Yes the test was crude. It would have been better to deflate it more. But he...
  13. rruff

    Ram 3500 - Spare tire options for 37s.

    ... like this guy did...
  14. rruff

    2019 Isuzu NPR 4wd Conversion SoCal -NFS for now

    F550 builds use military tires for that reason. I'm not dissing this rig at all, I was just pointing out that gator70s comment was incorrect. I think the chassis is superior to a pickup style for this. When pushing the boundaries of viable size and weight offroad, this is about the limit IMO...
  15. rruff

    Ram 3500 - Spare tire options for 37s.

    If you like you can measure this easily enough, and you don't need a locked diff. Just measure how far 1 rev gets you at near-flat vs full psi.
  16. rruff

    Ram 3500 - Spare tire options for 37s.

    It's pretty common for "37s" to be ~36.5". 'Merican units are to nearest inch. They "cheat" on width also, with 12.5" tires measured on 10" rims. This site has dimensions: https://tiresize.com/tiresizes/37-inch-tires/
  17. rruff

    Ram 3500 - Spare tire options for 37s.

    And incorrect. I used to believe this as well, but the really simple geometry is what I stated earlier. There is a steel belt under the tread that stretches very little, and this circumference determines how far the vehicle moves with each wheel revolution. There is a video somewhere on...
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