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Old May 15th, 2011, 02:57 PM   #226
Double D
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Default Re: '37 Volkster Coupe

I wouldn't be overly concerned with the placement, as stated before it's about available space!
On boats with closed engine covers, blower motors are used to vent out unwanted vapors....maybe you could vent it like a boat?
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Old May 15th, 2011, 03:09 PM   #227
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Default Re: '37 Volkster Coupe

I vote roll with it.

Mods I would do:
Buy a non-venting cap for the tank, then tap a vent tube into the top of the tank somewhere. Run the vent tube out to your wheel well or something.

You probably already plan to do this, but seal off the tank area from the passenger compartment with some body sealer or other liquid removable gasket to prevent fumes up there.

Make sure there's some sort of seal around the fuel line (you might even use metallic line to this point!) and lay down a layer of sheetrock (with a couple coats of laquer on it to avoid moisture absorption). This might prevent some of the heat transfer from the engine compartment.

Cool idea, good luck!
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Old May 15th, 2011, 03:44 PM   #228
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Default Re: '37 Volkster Coupe

Less freaking out, thanks.

The tank has a vent port just off the side of the top that will get routed outside of the compartment and probably in to the wheel well area. Away from the engine compartment.

That's right!..the bus gas tank. It's just hanging right out there by the engine. I guess I should be equally concerned with an engine fire as anyone driving a bus. Well...anyone who has an engine fire should be concerned 'cause that right there is BAD!

I have plans to use the HVAC duct wrap throughout the gas tank compartment. Should shield the noise and reduce some of the heat. I should also think about the engine bay side for heat and noise reduction?

In the design, I've been more concerned about keeping gas vapors/smell out of the driver's compartment, didn't think much about the engine compartment. feeling better. Again, thanks everyone!
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Old May 15th, 2011, 03:56 PM   #229
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Default Re: '37 Volkster Coupe

Quote:
Originally Posted by markh View Post
. . . He replies, "Most modern cars are designed with their fuel tanks located as FAR away from the motor as possible" . . . .
That's what the designers of the Ford Pinto did!


If you want more protection, though, there's the EZ Cool insulation sold by one of the Coalition Vendors, and I saw on tv that one of the pickup bed coating companies has a liquid heat blocking product that can be applied at home.
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Old May 16th, 2011, 10:45 AM   #230
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Default Re: '37 Volkster Coupe

It's already been stated here by others but my main concern would be the tank being enclosed. You don't want any gas vapors to be building up in there. Make sure you have good venting of the area to the outside of the body. Use a Non-Vented AKA sealed gas cap and run a large vent line off the tank to a remote outside location.
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Old May 16th, 2011, 11:49 AM   #231
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Default Re: '37 Volkster Coupe

Thanks Tequilla...(wow, maybe the only time in my life I've thanked Tequilla, usually cursing Tequilla! Damn you Tequilla!!) Ok, I digress.

Yes, I will take extra precaution to ensure adequate venting out of the gas tank compartment. Plan to use a ventless cap. Also have good gas tank venting fromt he tank and away from the tank compartment and engine.

All really great advice, thanks again.
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Old May 16th, 2011, 07:19 PM   #232
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Default Re: '37 Volkster Coupe

Gotta say I'm getting a chuckle out of this discussion. It makes me think of my first "car", a 1937 International truck. The gas tank was inside the cab, behind the seat and the fill spout was also inside the cab on the passenger side. The seat was cut out around it. I remember rolling the windows down for a few miles after filling it up. Good thing I didn't smoke.
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Old May 16th, 2011, 07:55 PM   #233
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Default Re: '37 Volkster Coupe

In my v-rod, the gas tank will be between the driver and passenger feet, vertical behind the dashboard.
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Old May 17th, 2011, 05:18 AM   #234
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Default Re: '37 Volkster Coupe

Yep, you need a change of plans anyway. By the time you finish. I'm not saying you are working slow. you bust out cars faster than I eat my food. Gas will be $6.00 a gallon. Go electric. Gas tank problem solved.
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Old May 17th, 2011, 06:58 AM   #235
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Default Re: '37 Volkster Coupe

Whozawhat, I've been following your build and it was your gas tank placement that got me thinking of where to place mine. Made perfect sense that unused space be good for something.

My first car in HS was a '50 Chevy pickup my dad and I built. (hence my familiarity with the Chevy cab section I used on the bugtruck) Anyway, the fuel tank was right behind the bench seat. If you filled it too much, you knew.

Moving forward with gas tank in parcel tray.

Anyone have a section of a newer beetle rear passenger fender with the round gas tank door lying around? The curvature of the top of the fender and the tank door is perfect for where I intend to install the filler neck for the gas tank. I need to scour the local junk yards, but thought I'd ask.
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Old May 18th, 2011, 11:58 AM   #236
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Default Re: '37 Volkster Coupe

If you want some small louvers we just killed our microwave and it has some.
I also have some small louvers from old furnaces that I had saved for just this kind of reason. Let me know and I can get them to you as I work in North Portland.

It would be advantageous to put a second opening into the tank area so there is flow of air available as the gas vapors rise.
As I can see it there is simply a hole at the bottom. If it is sealed it will still trap vapors.

The HVAC tape or mastic as it is called will do all of the things that you have mentioned it to as I have done that to the firewall on my bug and it really helped with the noise coming from that area.
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Old May 18th, 2011, 12:30 PM   #237
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Default Re: '37 Volkster Coupe

Some old tower computer cases had louvers too.
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Old May 18th, 2011, 08:50 PM   #238
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Default Re: '37 Volkster Coupe

Thanks catbox, the furnace lovers would be great. I'll shoot you a pm with a day and time. I have a great place in the wheelwell area in mind. Thanks, Mark
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Old May 19th, 2011, 11:13 AM   #239
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Default Re: '37 Volkster Coupe

Quote:
Originally Posted by fishguts View Post
Gotta say I'm getting a chuckle out of this discussion. It makes me think of my first "car", a 1937 International truck. The gas tank was inside the cab, behind the seat and the fill spout was also inside the cab on the passenger side. The seat was cut out around it. I remember rolling the windows down for a few miles after filling it up. Good thing I didn't smoke.
My best friend had an old chevy that was also inside the cab behind the seat.

I can remember one time filling up the fuel tank in the first 74 bug I had, then getting in the car and being overwhelmed with gas fumes. I looked over and saw gas flowing out of the floor vent on the passenger side. The fill tube was loose and half the gas I had pumped drained down the defroster tube, soaked through the tube, into the heater channel and out onto the floor mat. Thankfully, I was fairly smart back then and didn't try to start the car. I'd probably drive it home to clean it up these days
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Old May 19th, 2011, 11:25 AM   #240
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Default Re: '37 Volkster Coupe

Quote:
Originally Posted by markh View Post
Thanks catbox, the furnace lovers would be great. I'll shoot you a pm with a day and time. I have a great place in the wheelwell area in mind. Thanks, Mark

I will put them into my car tonight so they will be there.

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Old May 30th, 2011, 03:17 PM   #241
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Default Re: '37 Volkster Coupe

Aside from a couple of remaining items, including welding in the louvers to the fuel tank compartment, I'm just about ready to start slinging some filler.

To do items remaining:
1. Install gas tank filler door
2. Install second pan support rail
3. ?

If anyone has a recommendation or thought on what I need or should do before the filler work, please chime in.

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Old May 30th, 2011, 06:05 PM   #242
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Default Re: '37 Volkster Coupe

It is just so cool to see this thing coming to life.
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Old May 31st, 2011, 12:13 PM   #243
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Default Re: '37 Volkster Coupe

One more comment regarding your gas tank and interior fumes. The Triumph TR6 had the gas tank mounted between the interior compartment and the trunk, with the filler up on top in the middle. The tank was separated from the interior by a piece of 1/8 inch chip board covered in vinyl.

From the factory.

The design began with the Triumph TR2 and went on through the entire TR series unchanged. I've owned five Triumph TR6s, no smell, no fumes, no death by asphyxiation. Don't worry . . .!

Superb work and vision AND especially follow-through ! ! ! ! !

Luck,

TC
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Old May 31st, 2011, 04:02 PM   #244
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Default Re: '37 Volkster Coupe

I have been watching this build from the start and feel like a proud Father about to see his newborn and it isnt even my VW.lol. Looking great!!!
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Old May 31st, 2011, 04:26 PM   #245
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Default Re: '37 Volkster Coupe

Quote:
Originally Posted by markh View Post
Aside from a couple of remaining items, including welding in the louvers to the fuel tank compartment, I'm just about ready to start slinging some filler.

To do items remaining:
1. Install gas tank filler door
2. Install second pan support rail
3. ?

If anyone has a recommendation or thought on what I need or should do before the filler work, please chime in.


you got Vision , i got to hand it to ya Bud .
This is going to make Magazine stardom .
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Old May 31st, 2011, 06:30 PM   #246
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Default Re: '37 Volkster Coupe

Thanks everyone. I really look forward to getting this one on the road. I've never owned a convertible so this should be fun.

TC, I'm sticking with the original plans with the fuel compartment and taking the advice given. Thanks for the additional encouragement.

My self-imposed goal was to have it done by next weekend for the Woodburn bug-in here in Oregon but as you can see...I have a ways to go.

Give me another two months before I start passing out the cigars.
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Old June 1st, 2011, 01:53 PM   #247
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Default Re: '37 Volkster Coupe



I've been watching this one from the beginning as well and I'm speechless. Great job. Can't wait to see it finished.

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Old June 1st, 2011, 02:29 PM   #248
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Default Re: '37 Volkster Coupe

I wouldn't worry about putting the tank behind the seats. The spitfire anlso had the tank behind a cardboard panel behind the seats. I had a mk iv Spit with a factory steel lift off hardtop, never had problems with fumes. Had problems with just about everything else, but fumes weren't a problem.
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Old June 23rd, 2011, 10:00 AM   #249
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Default Re: '37 Volkster Coupe

At home finally. Very exciting!!


...it goes lower!
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Old June 23rd, 2011, 10:16 AM   #250
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Default Re: '37 Volkster Coupe

I'm not sure if I love you or hate you right now....
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