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Should I install a fuel pressure gauge?
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=31511		 Page 1 of 1
Author:  flash7210 [ Sun Apr 13, 2008 8:30 pm ]
Post subject:  Should I install a fuel pressure gauge?
GMCTD I'm looking at you :)

So...
I did the Facet lift pump install (thanks BlackLiberty) and it works great.
What I want to do is install a low pressure gauge between the fuel filter
and the engine.
Now, this is the clean side of the fuel system, do I dare mess with it and
take the chance of getting some minute particle in there that could clog
an injector?

Also, the gauge has plastic 3/8" fittings. Are there going to be any fuel
compatability issues?

I apprecitate any assistance and suggetions from anyone :)
Author:  gmctd [ Sun Apr 13, 2008 9:54 pm ]
Post subject: 
Not if you use fittings compatible with Diesel fuel...........but why? A Boost guage is more critical, and more fun to watch as the needle swings wildly back and forth - a fuel guage is boring, even if there's nothing else on but Oprah...............
Author:  BlackLibertyCRD [ Sun Apr 13, 2008 11:49 pm ]
Post subject: 
Flash you are welcome. I'm glad that many here are getting good use of the Facet lift pump mod. I must have over 25,000 miles on mine and it never missed a beat with the original fuel filter head. Must help keep the heater from burning out by keeping the head full of fuel :D
Author:  flash7210 [ Mon Apr 14, 2008 12:32 pm ]
Post subject: 
gmctd wrote:
Not if you use fittings compatible with Diesel fuel...........but why? A Boost guage is more critical, and more fun to watch as the needle swings wildly back and forth - a fuel guage is boring, even if there's nothing else on but Oprah...............


Yeah, they are boring, that is untill something goes horribly wrong.
This was my line of thinking. Install a pressure gauge to help identify and
prevent something from going wrong, like a clogged filter or other
obstruction.

Maybe I am over thinking this and after all, ignorance is bliss :wink:
Author:  Uffe [ Mon Apr 14, 2008 12:47 pm ]
Post subject: 
gmctd wrote:
Not if you use fittings compatible with Diesel fuel...........but why? A Boost guage is more critical, and more fun to watch as the needle swings wildly back and forth - a fuel guage is boring, even if there's nothing else on but Oprah...............


If that's what you want, get a boost gauge with 0 - 1.5 bar scale. Unlike what I got! Mine goes from -1 to 3 - the next gauge for my next car I will research a lot better!!

Same goes for EGT, it goes from 300 to 1300C (400-2300F) which is overkill.

You live, you learn.
Author:  flash7210 [ Tue Apr 15, 2008 7:54 am ]
Post subject: 
BAR?

Yeah, well, you know here in the States we use PSI :wink:
Author:  Uffe [ Tue Apr 15, 2008 8:20 am ]
Post subject: 
flash7210 wrote:
BAR?

Yeah, well, you know here in the States we use PSI :wink:


Well in WW2 you guys did use a BAR rifle :D
Author:  rpapkey [ Tue Apr 15, 2008 2:40 pm ]
Post subject: 
Something i've been contemplating for when i do the fuel pump job. Maybe a pressure switch set really low say 1-2 PSI. Wired to a tiny bulb or LED on the dash board. You won't have the benifit of trend monitoring but if something goes wrong at least you'll have some warning. You might need to wire some kind of Not gate in order to get the light right, but hey thats a pretty simple thing too.

Here's a from a 30 second search. http://content.honeywell.com/sensing/hss/hobbscorp/P3_6.pdf

What do you guys think of this?
Author:  warp2diesel [ Tue Apr 15, 2008 6:03 pm ]
Post subject:  Cheap pressure switch
The old air cooled VWs had an oil pressure switch that shut off around 3 PSI (0.2 bar). I picked up one at O'Reily Auto Parts and have figured out a way to adjust it down to 3 PSI by using a set screw and small spring if the shut off pressure is too high. To hook this contraption up to an LED for an idiot light just add a 1K resistor to the LED to drop the voltage from 12 volts so you don't fry the LED.

I will post this creation when I get time to do it.


Steve

Update: I tested my VW Air cooled oil pressure switch and it checks out at 3.2 PSI, I will hook it up to the discharge side of my filter head and see how my Carter pump does under driving conditions. If the pressure shut off point is too high, I will add the coil spring and adjust it down.

Picasa link: http://picasaweb.google.com/warp2diesel ... sureSwitch
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