2 gallon fuel tank (...a get outta jail card)

[mtnride1]

I carry 2 rotopax on the high end of my swing away. Truthfully I have only needed 1 only a couple of times also I live in the desert and summers can get above 110 and as high as 121 and I have never had a problem, I have opened them occasionally to vent when I think about it. I think I am going to take one off. if someone wants a gas rotopax.
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87 westy 2wd (NED)

[Sodo]

[dgbeatty]

Just a thought. If you route the return line thru the reserve tank with the outlet at the very top it would stay full and fresh. The addition of a valve at the bottom would allow the reserve to flow to the main tank. Much like VWs were in the early years and no need to ever remove the reserve tank.
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Schau in das Buch

[Sodo]

[Sodo]

[DanHoug]

just be sure to leave headspace for liquid expansion!!!
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-dan
60% of what you find on the internet is wrong, including this post.

'87 Westy & '89 Westy both 2.1 4spd

Past projects can be found at--
www.thefixitworkshop.com

[Sodo]

Dan the tank is filled to 1 3/4" from the top.
So there is airspace at the top, "double" as explained a few posts back (7/24).
It's filled to 93% capacity, 7% empty space.
2.04 gallons (of 2.2).

OK so here it is in full sun, probably since 11:00 AM.
Flat black "IR target" on the shiny Aluminum is 79°F.
Indoors, my shaded shop floor was 77°F (concrete).
Black plastic tub surface is pretty hot.... 151°F

I unscrewed the cap very slowly and there was no "audible PFFFFTTT"

Inserted the pressure guage and will check for pressure in a few hours.

Any guesses on the pressure & temp rise?
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'90 Westy EJ25, NEW oil rings (!) 2Peloquins, 3knobs, SyncroShop pressure-oiled pinion-bearing & GT mainshaft, filtered, cooled gearbox.
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered original gearbox
....KTMs, GasGas, SPOT mtb

[DanHoug]

applying geeky physics stuff... the shiny Al won't get too hot, and the black plastic is only going to contribute slight radiant heat from the side. now put a sheet of clear plastic over that bad boy to capture the radiant heat and THEN you'll warm 'er up.
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-dan
60% of what you find on the internet is wrong, including this post.

'87 Westy & '89 Westy both 2.1 4spd

Past projects can be found at--
www.thefixitworkshop.com

[Sodo]

I'm most interested in what the pressure might rise to if sitting ontop of a van in the westy cargo area.
I assume it will be less than in the black tub.
The bright shiny aluminum reflects a lot of the heat.
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'90 Westy EJ25, NEW oil rings (!) 2Peloquins, 3knobs, SyncroShop pressure-oiled pinion-bearing & GT mainshaft, filtered, cooled gearbox.
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered original gearbox
....KTMs, GasGas, SPOT mtb

[Sodo]

I know y'all are at the edge of your seats!

Here we are at 1:30.
We have needle liftoff!
I've got the fire department on speed-dial.

Although nobody is really suprised that it's obeying the vapor pressure curve
..... appx 2-4 psi at 97°F
I'm not.
But somehow, if that tank was sitting ontop of my van in Death Valley
....it helps to have seen the guage with my own eyes.

Added a Kolpin gas tank to the test-fixture.
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'90 Westy EJ25, NEW oil rings (!) 2Peloquins, 3knobs, SyncroShop pressure-oiled pinion-bearing & GT mainshaft, filtered, cooled gearbox.
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered original gearbox
....KTMs, GasGas, SPOT mtb

[jimf909]

An action packed afternoon of myth-busting. May we have a web-cam feed please?
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- Jim

[kublerwagen]

Now, now we mustn’t have *facts*! This is the samba, it’s all about the fear. Note post a few up about running from gas station attendants. It’s a wonder any of us here in Oregon are still alive.

[Steve M.]

Was it nice cooled gasoline you put in there straight from the fridge or nice hot gasoline from another tank?
Takes some time to warm up dinosaurs from the freezer!
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This free advice is worth exactly what you paid for it.

There are seven days in a week. Someday is not one of them.

[Sodo]

The gasoline temp probably started at 77°F,
I suppose similar to the morning temp of the garage floor?

Your tireless mythbuster

-- Had to get up from two naps to brave the heat.
-- Record the moment where "it's 90 in the shade and there ain't a cloud in the sky"
-- ....flog photoshop.

Don't say I never do anything for ya.

You Oregon fellers are lucky, you can go to any gas station and ask questions
'cuz you have fuel transfer professionals.
But the rest of us get all worked up, ya know, 'cuz we can't get the answers.

So it goes like this: (in Oregon, where by law, they don’t have “self-serve gas”)

“Hey can I ask you a question?”
(pimply kid looks up from his phone) “uhhhh”
“Can I put gas in a can out in the sun and then crash my van?”
“uuuuuh I guess”
“What kind of training do you get for this job? Do you have certs?”
“uuuuh Maybe they have them in the store, my gramma eats those sometimes”.
“I mean, did you have to go to training - to pump gas?”
“Uuuuh not really, like if the customer wants to pump their own we hand him the nozzle and stuff.”
“OK thanks for your time.”

Nothing like advice from a pro!

Anyway I'm less concerned about the aluminum tank that I was before
so I'm at least thankful for Steve's "easy test" suggestion.

The bloated plastic tank looks like its struggling.
But note it hasn't even blown the little yellow cap off.
Those just barely snap on, you can knock it off just walking by.
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'90 Westy EJ25, NEW oil rings (!) 2Peloquins, 3knobs, SyncroShop pressure-oiled pinion-bearing & GT mainshaft, filtered, cooled gearbox.
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered original gearbox
....KTMs, GasGas, SPOT mtb

[Steve M.]

Well pressures are better then a 15" car tire on a hot hey on a summer day!
_________________
This free advice is worth exactly what you paid for it.

There are seven days in a week. Someday is not one of them.

[pinetreeporsche]

As seen on page 3 of this thread:

[Sodo]

[rmcd]

Flame suit on ....

https://www.ebay.com/itm/Ballards-NEW-MX-Motorbike...3201278560

Not for long term storage.
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VW LT40 build. Like a Vanagon but 30% larger in every direction and 40% slower even in metric.
https://www.thesamba.com/vw/forum/viewtopic.php?t=749359&highlight=

[Sodo]

[jimf909]