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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50338
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 Posted: Sun Aug 28, 2011 3:28 pm Post subject: |
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Scott can help you out with this one.
http://www.germansupply.com/home/customer/product.php?productid=16928&cat=&page=2
I bought one and never got it installed. What I have used for years is a plastic inline fuse mounted high in the engine compartment. If a fire starts the plastic fuse housing isn't going to last more than a few seconds before it melts causing the circuit to open thus shutting off power to the pump.
The additional problem you have on a bus is that the fuel may continue to flow by gravity because of the high tank location even if the fuel pump is not running. I have my fuel pump mounted high in the engine compartment and being fed by a steel line. If I get an engine fire the rubber hose between the pump and the carb will burn off breaking the syphon.
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shaunone
Samba Member
Joined: July 15, 2009
Posts: 157
Location: Canada
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| Posted: Sun Aug 28, 2011 6:18 pm Post subject: |
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This was the information I was looking for. It seems like there are quite a few options, but I like the points trigger method the best. That being said, if the relay does fail, and 'sticks' on, wouldn't that cause the pump to run steady? I guess this is where the secondary hard switch would prove fail-safe. How would you route this to the dash?
_________________
| Tom Powell wrote: |
| Olddog52 wrote: |
| one tab to ground, the other to a 12 volt source. Listen intently for a sound. |
I put the horn next to my ear and I could hear the ocean.
When I hooked up the battery I couldn't hear anything for three days.
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1977 Westfalia with a 1974 1800 Type 4 engine |
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telford dorr
Samba Member
Joined: March 11, 2009
Posts: 3551
Location: San Diego (Encinitas)
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| Posted: Sun Aug 28, 2011 6:23 pm Post subject: |
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As the relay module cited is designed for this service, the probability of 'stuck on' failure is low. The pump just doesn't draw all that much current...
_________________
'71 panel, now with FI
'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones
In theory, theory works in practice; in practice, it doesn't - William T. Harbaugh
When you're dead, you don't know you're dead. The pain is only felt by others.
Same thing happens when you're stupid. - Philippe Geluck
More VW electrical at http://telforddorr.com/ (available 9am to 9pm PST) |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50338
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| Posted: Sun Aug 28, 2011 6:38 pm Post subject: |
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| telford dorr wrote: |
| As the relay module cited is designed for this service, the probability of 'stuck on' failure is low. The pump just doesn't draw all that much current... |
I would agree, The stick "ON" failure rate is probably one in 1,000 units or less.
Last edited by Wildthings on Sun Aug 28, 2011 9:38 pm; edited 1 time in total |
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Vince Waldon
Samba Member
Joined: November 07, 2010
Posts: 451
Location: Edmonton, Alberta
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| Posted: Sun Aug 28, 2011 7:12 pm Post subject: |
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Millions and millions and millions of Rabbits used this relay... for decades and decades and decades. I logged a few of them myself.
At this point I'd suggest drive more, worry less??!!  |
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greenbus pilot
Samba Member
Joined: March 14, 2008
Posts: 1285
Location: Wisconsin: Rustbelt, USA baby!!
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| Posted: Sun Aug 28, 2011 10:39 pm Post subject: |
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| Tcash wrote: |
| greenbus pilot wrote: |
Find a FUEL PUMP RELAY from an early Rabbit, etc and use that. It has an additional input from the ignition circuit- if the engine stops, so does the pump. I assume it has a logic circuit  |
That's neat, would be easier than plumbing in a Oil Press. Switch. I am not familiar with with Rabbits do you remember about what year vehicle they came in?
Thank You |
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I found this one at Busdepot,various applications through 1982--
http://busdepot.com/details.jsp?partnumber=321906059C
These were used in all CIS injected water cooled Volkswagens, and are easy to find at the salvage yard, along with the nice neat socket to wire it. Check your Bentley or Haynes for diagram, nothing exotic- just an additional wire for the ignition circuit. I would not put it in the engine compartment, but somewhere cooler, as maybe under the rear seat or someplace.
_________________
Sent from a white van down the street. |
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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
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| Posted: Sun Aug 28, 2011 10:43 pm Post subject: Fuel Hoses |
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Wildthings wrote, The additional problem you have on a bus is that the fuel may continue to flow by gravity.
I am concerned about this too. I have not had a chance to research it yet but I have thought about using marine grade fuel hose. Problem may be finding it in the correct size???? |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50338
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| Posted: Mon Aug 29, 2011 8:54 am Post subject: Re: Fuel Hoses |
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| Tcash wrote: |
Wildthings wrote, The additional problem you have on a bus is that the fuel may continue to flow by gravity.
I am concerned about this too. I have not had a chance to research it yet but I have thought about using marine grade fuel hose. Problem may be finding it in the correct size???? |
I did a little testing a year or so ago, trying all sorts of fuel line to see which was the most fire resistant. The 30R9 Fuel Injection rated hose took longer to burn through than the so call "fire resistant" marine hose. |
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shaunone
Samba Member
Joined: July 15, 2009
Posts: 157
Location: Canada
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| Posted: Mon Aug 29, 2011 1:19 pm Post subject: |
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can anyone tell me where I might find this relay on the rabbit or vanagon?
_________________
| Tom Powell wrote: |
| Olddog52 wrote: |
| one tab to ground, the other to a 12 volt source. Listen intently for a sound. |
I put the horn next to my ear and I could hear the ocean.
When I hooked up the battery I couldn't hear anything for three days.
|
1977 Westfalia with a 1974 1800 Type 4 engine |
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Vince Waldon
Samba Member
Joined: November 07, 2010
Posts: 451
Location: Edmonton, Alberta
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| Posted: Mon Aug 29, 2011 8:56 pm Post subject: |
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| shaunone wrote: |
can anyone tell me where I might find this relay on the rabbit
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It's on the fusepanel behind the driver's kneepanel... you'll recognize it because it's the only relay with a fuse on it. |
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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
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| Posted: Mon Aug 29, 2011 10:37 pm Post subject: Re: Fuel Hoses |
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| Wildthings wrote: |
| Tcash wrote: |
Wildthings wrote, The additional problem you have on a bus is that the fuel may continue to flow by gravity.
I am concerned about this too. I have not had a chance to research it yet but I have thought about using marine grade fuel hose. Problem may be finding it in the correct size???? |
I did a little testing a year or so ago, trying all sorts of fuel line to see which was the most fire resistant. The 30R9 Fuel Injection rated hose took longer to burn through than the so call "fire resistant" marine hose. |
Thank You Wildthings, I posted a link to Goodyear
SAE30R9 |
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