Bio-Diesel H1

[pdxhummerguy]

So i am in need of a schematic of the H1. I am looking into not only having a larger tank fabricated for it and would like to see what I can do but also need to know how much clearance I have between the top of the tank and the underside of the vehicle. Let me know if anyone has or knows where to get these.

[phazer42]

what year truck do you have??

Really.... the best solution for a Hummer to make more fuel volume is the following....

with dual, stock, tanks.... get dual fender well tanks. So, you would have the RH fender tank feeding the main fuel tank, and the LH fender tank feeding the aux tank. I believe the fender tanks are like 17 gallons each which would give you 76 Gallons in capacity (unless you have an alpha) which should be plenty!!

Personally, I would place check valves on the inlets to the main and aux fuel tanks so when off-roading you can't get the fuel to "find" its way into one of your "new" tanks when you are on steep grades.....

this would also require you to have your exhuast dump out in front of the LH rear wheel similar to a Humvee....

[ssgharkness020147]

You could also do a two inch body lift, and probably put the Alpha tanks in. The reason I say probably is because I am not positive they will just fit.

[pdxhummerguy]

Originally Posted by phazer42

what year truck do you have??

Really.... the best solution for a Hummer to make more fuel volume is the following....

with dual, stock, tanks.... get dual fender well tanks. So, you would have the RH fender tank feeding the main fuel tank, and the LH fender tank feeding the aux tank. I believe the fender tanks are like 17 gallons each which would give you 76 Gallons in capacity (unless you have an alpha) which should be plenty!!

Personally, I would place check valves on the inlets to the main and aux fuel tanks so when off-roading you can't get the fuel to "find" its way into one of your "new" tanks when you are on steep grades.....

this would also require you to have your exhuast dump out in front of the LH rear wheel similar to a Humvee....

My truck is a 2002. I would like to not have to raise the truck and am hoping for the schematics as I would like to possibly have something custom built.

[phazer42]

there used to be a company that would make these saddle tanks, but I don't think they make them anymore.. Realistically they are really simple with minimal modifications... you would have to change your "fill" point from the RH side of your truck to the back of your truck, as the ones that I have seen wiith these saddle tanks had a filler cap just north and outboard of the tail light assembly near where the marker light is... if you get one custom made you would be set. Since your fill pipe for both the main and aux tanks already ride abve the frame rail, you will just need to change where it goes. You could likey get more fuel in the RH saddle tank then the LH as your feed pipe to the aux tank would need to be near the bumper (as thats where it is currently) whereas the main is in the front so you could likely get a good amount of volume in it....

The other thought would be to modify the bottom of your bed and create that as fuel storage.... you can figure ut volume fairly easily just from raw dimensions..... BUT.... please note.... for crash reasons... there is often a "vapor" zone in every fuel tank so that when the "incompressible" fluid is forced to go somewhere, it can, rather then leaving the tank assembly..... typically they see around 5-10% vapor space in a fuel tank assemly to be "safe"

[pdxhummerguy]

Originally Posted by phazer42

what year truck do you have??

Really.... the best solution for a Hummer to make more fuel volume is the following....

with dual, stock, tanks.... get dual fender well tanks. So, you would have the RH fender tank feeding the main fuel tank, and the LH fender tank feeding the aux tank. I believe the fender tanks are like 17 gallons each which would give you 76 Gallons in capacity (unless you have an alpha) which should be plenty!!

Personally, I would place check valves on the inlets to the main and aux fuel tanks so when off-roading you can't get the fuel to "find" its way into one of your "new" tanks when you are on steep grades.....

this would also require you to have your exhuast dump out in front of the LH rear wheel similar to a Humvee....

Where can I purchase these fender well tanks? I am ready to do the conversion on the H1 the right way. I have a 2002 Excursion with a 7.3 psd in it that I am having converted to veggie as well. After much research I have pretty much decided to use a company called Fossil Free fuels out of PA. Have had several conversations with these guy and they really seem to know their stuff and are thinking progressively ahead of the rest of the pack in my opinion. They are taking my excursion which has a 44 gallon main tank from the factory and converting this to a heated veg tank, adding an additional 30 gallon veg holding tank & then fabbing up an 18 gallon diesel tank for start up and purging at shutdown. They have a really nice looking interface taht I have yet to see anyone else in the veg community come close to. Here is a link to a video that shows a glance of the digital interface. It gives you fuel levels for all tanks, veg oil temp readings as well as a temp reading at the point of injection. Pretty trick set-up. http://youtube.com/watch?v=9sQwccnH3KM Does anyone have any experience or know anything about them? their website is a work in progress but it's www.fossilfreefuel.com .

[phazer42]

I don't know if they are made anymore.... you might wanna give Predator a call and see if they made them anymore or see if someone will fab some up for ya.... shouldn't be to bad of a job...

[pdxhummerguy]

Originally Posted by phazer42

I don't know if they are made anymore.... you might wanna give Predator a call and see if they made them anymore or see if someone will fab some up for ya.... shouldn't be to bad of a job...

I am a fearful of doing anything through predator based on my own experience and stories I have heard. I am just trying to get some direction as to possibly where to start looking for these or how exactly they mount and or how they function.

[phazer42]

well... in that case if you don't have a fabricator that you can trust... get ahold of Travis at Rubber Duck 4x4 as he does very good work.

Basically they would bolt in through your body, or depending on how you have it, you would have a bracket system that would hold it into place. There would then be a filler point that would be near the top of you fender for obvious reasons. The one truck that I saw with this had the filler between the tail light and the marker light. Looked actually pretty good, he just had a silver filler cap on it and it blended in very well....

There are some guys on the HML that could probably get you some pictures, and I sure Travis has worked with these in his Hummer past....

[pdxhummerguy]

http://www.humvee.net/pix/tank/amtank.html is this sort of what you all are talking about?