So i recently installed the weber 38 from my old 23/36 and was wondering how that would affect my MPG and fuel consumption. Of course my gas gauge stopped working, so i have been basing it off the trip meter (for about a year). Typically i get 240 miles to the tank. (Yukon 5.29, and 35" Coopers, somebody else might know how to figure how close to stock i am)

Anyways, i swapped the weber and filled it up about a week or so ago. Since then i was able to get 211 miles out of the tank. I did not let it go bone dry because i don't have a spare fuel tank anymore, but i figured it HAD to be close. So i filled it up with Plus (since fuel is currently cheap) According to the pump I got 13.264 gallons in the tank. As far as i have heard the stock tank on a 1982 toyota pickup is not even 13 gallons. Was i literally running on fumes or fuel deposits?



I figured that i would be getting slightly less fuel economy, but i don't know how empty it really is, so i can't properly calculate the my new MPGS.

 

Short or long bed?

Yeah, even on fumes I don't know if I ever got more than 12 gallons into my 83 short bed. Hopefully the gas station isn't ripping people off

 

Arco has been known to do that i guess. Mine is a long bed. Do the longbeds have larger tanks? I have never gotten more than 12.5 i think MAX, and that was when i did run all the way out.

 

Huh. I thought long beds came with a larger tank. But your experience means more than what I "think", so if you know you run out of gas before 13 gallons, I can't argue.

I don't know what's up with that.

 

From a previous post i had about tanks

 

Yo are saying that i actually have a 16 gallon tank in my long bed? I have never heard of that. Could there really be 3 gallons of crap in the bottom of the tank ?

 

If there was that much crap in the tank you would be changing fuel filter every week! I have run out of gas in my truck (short bed, small tank) where the truck just wouldn't start and there was less than a gallon left in it. Maybe your pickup tube isn't all the way at the bottom of the tank (I bent mine a little and sqeezed the tip to make sure it picked up from as low as possible) and there might still be a couple of gallons left in the tank when you run out because of the lack of baffles, the fuel sloshes around more in a large tank, it's just a guess.

to be more precise I would fill up to the cap, run 50-60 miles then refill and check mileage. To check the mileage difference you can compare speeds on a gps, there are free apps for that too.

 

Thanks for the info. Looks like it's finally time to pull out the gas tank and fix some stuff. I wanted to do it when i installed the new carb and ran fresh fuel lines. Doing that with the tank installed was a PITA. I also need to at least try to rebuild the fuel level sender at the same time.

How big of a job is dropping out the tank? Obviously would want it to be as empty as possible. Is it difficult and are there a few things i should know before hand? Wont be getting into this mess for at least a week.

 

If you drain the fuel by the drain bolt get a new copper washer or teflon to keep it from leaking, you can get a new sock filter for the pickup tube I think they were less than 10$, check hose clamp conditions and get new ones if yours look stuck or if they look like they'll break. get some white vinegar to clean the inside, you can clean the sending unit aswell (Kawa made a good post about it). Oh and don't smoke during the job

 

Thats some good advice. i would not think of vinegar. that and an scotch brite pad or something? Where can i get the teflon washer for that, and what is the P/N for the filter screen? I like the teflon ones because they are strong and reusable.

Definitely no smoking. lol Did somebody learn this from experience on here? I'll keep the fire extinguisher within reach just to be safe.

Any issues with the filler tube in these, or will they stand the test of time and all that corrosive fuel?

 

Dropping the tank is easy. Just remove the shield, drain out gas, drop tank. And somewhere in there disconnect the filler tube

I don't remember all the exact steps but I remember that I had my gas tank out of the truck less than half an hour after I walked into my garage to do it. And that included learning the hard way the the cheap gas station styrofoam cooler laying around in the garage is NOT the container to drain your gas into

FWIW, my 78 is supposed to have a 13 gallon tank, I think. Even when I've been on fumes, and I mean FUMES, I could never get it to take quite 12 gallons.

 

yes. That tank was pulled out of a long bed when I was researching putting a long bed tank in my short bed. It is possible. Toyospearo found a way.

 

Well that is good to know, must be an issue with it not being able to pull at low volumes or something like that. Guess there is only one way to find out. It sure would be nice to use all 16 gallons of the tank since i just upgraded to a weber 38 and probably will be burning more fuel.

 

Toyospearo found a way to fit a lwb tank in a swb? Is there a thread on that?

 

I would also be interested in mounting a long box tank in my short box truck. Got two swb trucks, and two spare lwb tanks.

 

Little update. Ran out of gas on I-5 and ended up walking 7 miles round trip in a suit and tie for fuel. Must have looked funny.

I got the Odometer fixed and it made it to 221 miles before it died on me. Thought it would make it to the next exit for gas, i was wrong. Put almost 2.5 gallons from a can in then filled it with 12 gallons. Looks like i got up to about 14 gallons in my tank now.

Went from 240 miles on a tank with the weber 32/36 to 220 with the weber 38. Not as much MPG sacrifice as i thought. Looks like I am going to need to get a 30 gallon fuel cell if i want to confidently be able to go 400 miles.

 

yes, 3.8 seconds to find it
https://www.yotatech.com/forums/f114...e-pics-251530/

 

Since my 78 has only a 12 gallon tank (at least as far as useable gas), and the gas gauge is broken, I travel with a 5 gallon military jerry can full of gas, always. Takes all the stress out of running out of gas.

With my truck, though, I get a LOT of sputtering before it dies. From the first hesitation I feel, I can usually go about 5 miles at highway speed. From there, I can easily go another 10 miles, but it starts getting slower and slower and stalling more & more often, till I'm crawling along on the side of the road. That was the time I got it down to fumes, and still it took just under 12 gallons.

And I always carried a gas can with me after that. Gas mileage varies too much, depending on conditions, to leave it completely up to mileage.

 

I really need to get me one of those jerry gas cans, they are just so expensive. Anybody know a good place to get a quality one that is not marked up in a price a ton?

 

Here. Depending on what your definition of expensive is.

For the record, I bought the green NATO jerry can. According to what some people have told me, it is now illegal (not sure if by state or federal law) to have gas in anything other than a red can. In Oregon, in particular, one gas station would not fill it, since it wasn't red.

The red ones are more expensive...

I had originally bought another green (generic) one from the local hardware store for 20-some dollars. It worked fine, but the spout leaked a little, and it was constantly clanging as the temperature changed. So I'd be hanging out in my camper out in the desert or mountains somewhere, all peace and quiet, then BANG as the metal expanded or contracted.

The NATO one doesn't do that.