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David K
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Quote: Originally posted by 4x4abc  | general rules for airing down are as follows:
lets say your normal air pressure is 30 psi (check what your truck manufacturer recommends)
"off-road" go down 1/3 of normal = 20 psi (leaving pavement to medium duty off-road like pole line road)
"mud, sand and snow" go down another 1/3 = 10 psi (soft sand, severe duty off-road like Rubicon Trail)
"emergency" go to 50% of the last setting = 5 psi (stuck at the beach, very steep hill climbs)
and no, the tire will not come off the wheel with low psi unless you do something stupid
rules for soft sand etc
you should air up as soon as conditions change - however, if your compressor just broke down, you can still drive on pavement to the next gas station
on 10 psi tires. Just don't drive faster than 40 mph and not longer than 1 hour
[Edited on 4-10-2015 by 4x4abc] |
Thanks Harald! Is that your web site page? In sand, less is best! Here is a post I made on Tacoma World about the difference between street pressure
(30-35) and sand pressure (15 psi) with photos of both, on Shell Island: http://www.tacomaworld.com/forum/off-roading-trails/104202-b...
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David K
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| Quote: Originally posted by Taco de Baja |
Thanks for sharing a great trip report.
In all my drives through Baja, that was one of the nastiest roads I have been on, not the worst, but right up there. 
Just a minor correction on the Hemingray insulator.
The 1 is a mold number, not a month. The 41 is a year; but you also need to check if there are any dots after the 41. 1 dot = 1942, 2 dots = 1943, 6
dots = 1947, etc.
For decoding other numbers seen on Hemingray insulators go here: http://www.hemingray.info/database/mold-datecodes.html |
THANKS! The one pictured above is 1-41. (one dot after the 41). That insulator was found by Harald. I found a broken one with
7-41. (one dot after the 41). Thanks for that link, WOW!
[Edited on 4-10-2015 by David K]
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Mexitron
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| Quote: Originally posted by Taco de Baja |
Thanks for sharing a great trip report.
In all my drives through Baja, that was one of the nastiest roads I have been on, not the worst, but right up there.
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And we did the Pole Line after coming down El Mano and up Agua Caliente...that's quite a tour, thinking back on it.
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güéribo
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| Quote: Originally posted by 4x4abc | general rules for airing down are as follows:
lets say your normal air pressure is 30 psi (check what your truck manufacturer recommends)
"off-road" go down 1/3 of normal = 20 psi (leaving pavement to medium duty off-road like pole line road)
"mud, sand and snow" go down another 1/3 = 10 psi (soft sand, severe duty off-road like Rubicon Trail)
"emergency" go to 50% of the last setting = 5 psi (stuck at the beach, very steep hill climbs)
and no, the tire will not come off the wheel with low psi unless you do something stupid
rules for soft sand etc
you should air up as soon as conditions change - however, if your compressor just broke down, you can still drive on pavement to the next gas station
on 10 psi tires. Just don't drive faster than 40 mph and not longer than 1 hour
[Edited on 4-10-2015 by 4x4abc] |
Thanks for making it so clear. Really helpful.
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JohnK
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Thanks for the tire pressure info. Always did wonder if that little camper on the back of the Tacoma changed things. It and our stuff add up to almost
1,000 lbs. Again, great trip report!
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4x4abc
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John,
unequal weight distribution might change things. You may need different tire pressures front and rear. Run a chalk line test for front and rear to
establish your normal running pressure.
http://www.nitrogentiremachine.com/proper_tire_inflation.htm
Harald Pietschmann
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David K
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| Quote: Originally posted by JohnK | | Thanks for the tire pressure info. Always did wonder if that little camper on the back of the Tacoma changed things. It and our stuff add up to almost
1,000 lbs. Again, great trip report! |
Ask Frigatebird (second gen Tacoma 4 door with pop up camper) or TMW (first gen Tacoma with camper shell) what they ran the road at... I do think they
were 25 psi, maybe 20?
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David K
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The broken insulator I found has the mark 7-41. on the one side.
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JohnK
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Forgot about that chalk line test. I'll do that before I go down next time. Thanks.
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4x4abc
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John,
what size tires are you running?
Harald Pietschmann
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TMW
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My Toyota is a 2004 extended cab with a shell. Unloaded I run 32psi cold which runs up to 35psi hot in the front and 25psi cold, 28 hot, in the rear.
When I load the truck for a trip like the PLR I run 32 cold front and rear, which is 35 hot. On the PLR run I dropped to 25 hot at the end of Laguna
Salada. In Arroyo Grande after the first day of camping I dropped to 15psi after talking to 4x4ABC. It ran much better. I have dropped to as low as
10psi hot to get out of trouble.
In 2004 during the SF250 race we dropped a class 8 race truck running with a broken axle to 4 psi and he almost finished the race. One wheel drive
and got stuck after stopping for a buggy at the end of Matomi Wash.
As 4x4ABC will tell you be carefull of any sudden steering changes at low tire pressure or you could pop a bead.
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TMW
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I would also like to thank Harald (4x4ABC) and Karl (Fernweh) for being with us on the PLR and mostly for the trip down Arroyo Grande for the Diaz
grave hunt. I had a great time conversing with both of you. It was both fun and informative.
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Frigatebird
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| Quote: Originally posted by JohnK | | Great Adventure! Great Post! A question: When on roads like that, do you air down? I've got a Tacoma and a pop-up camper. Always wonder what to do
when I go from Coco's down to the 1. |
I ran 25 psi on the PLR. It seemed about right, although when climbing BB hill I spun them some (open front, LSD rear) stuck in 4 Hi.
Lowered them to 20 on the sand in AG, then to 14 for more floatation.
Avatar courtesy of Herb 
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David K
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| Quote: Originally posted by Frigatebird | | Quote: Originally posted by JohnK | | Great Adventure! Great Post! A question: When on roads like that, do you air down? I've got a Tacoma and a pop-up camper. Always wonder what to do
when I go from Coco's down to the 1. |
I ran 25 psi on the PLR. It seemed about right, although when climbing BB hill I spun them some (open front, LSD rear) stuck in 4 Hi.
Lowered them to 20 on the sand in AG, then to 14 for more floatation. |
Good to see you here Joe!
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JohnK
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What great information! My Tacoma has BF Goodrich All Terrain T/A LT 265/75R16 tires, whatever that means. When I bought and picked up the Fourwheel
pop-up camper, they put an additional blade in for me. Makes for stiff driving when I don't have the camper on.
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David K
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| Quote: Originally posted by JohnK | | What great information! My Tacoma has BF Goodrich All Terrain T/A LT 265/75R16 tires, whatever that means. When I bought and picked up the Fourwheel
pop-up camper, they put an additional blade in for me. Makes for stiff driving when I don't have the camper on. |
It means you have 32" tires, or 1" bigger than stock (same as me and many other Tacomas).
The Off Road TRD comes with 265/70-16 tires and without a body lift, we can go up to the 75 series tire, gain 1/2" of ground clearance, and have no
body rub. I believe the new Tacoma TRD Pro has the 265/75-16 tires from the factory?
Your speedometer will read accurately with the taller tire (because the factory intentionally sets the speedometer to read fast with the stock tires).
However, your odometer will be just a little slow... about a mile per 40 traveled, or you actually went 41 miles when 40 is shown.
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David K
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MAPS/MILEAGE... Summit Rd/Locked Gate to Basketball Hill
Locket Gate/ Bottom of Summit (Original Pole Line Road grade, 'Portezuelo de Jamau') to Camp 1 (SAT CAMP) = 1.1 miles
SAT CAMP to Almost U Turn = 0.3 mile
Almost U Turn to Pole Line Road Jcn. = 0.5 mile
Pole Line Road Jcn. to 'Left at Y' = 2.2 miles
The right branch of the Y looks like is the newer 'Cañon Jamau' Grade road.
'Left at Y' to Fence Gate = 1.0 mile
Fence Gate to Cobble 1 = 2.0 miles
Cobble 1 to White Tank = 0.7 mile
White Tank to Cobble-2 = 2.3 miles
Cobble-2 to Cobble-3 = 0.5 mile
Cobble-3 to Basketball Hill Bottom = 2.4 miles
Basketball Hill Bottom to Top = 0.2 mile
Total Mileage from Bottom of Summit to Top of Basketball Hill: 13.2 miles (with stops took 6 hours)
No clouds on Bing:
Close up of Basketball Hill:
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David K
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When comparing the road log from an earlier run, and no locked gate to go around, the mileage from the gate to 'Left at Y' was 3.0. With the detour
the distance increased to 4.1 miles.
The Left at Y to White Tank was given as 5.0 miles, but I measured it at 3.7 miles.
The White Tank to Cobblestone Hill (Cobble-3) was given as 3.0 miles, and I measured it as 2.8 miles.
Cobblestone Hill to Basketball Hill Bottom (Turnoff) was given as 2.4 miles, and I also found it was 2.4 miles (winner!).
The next maps and mileages coming soon!
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4x4abc
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the hunt for glass insulators and the Henderson Mystery
http://carlosnpainter.smugmug.com/Events/Glass-insulators-an...
Harald Pietschmann
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David K
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Some nice photos there!
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