Home » Public Forums » GMCnet » Fuel system upgrade progress
| Re: Fuel system upgrade progress [message #245686 is a reply to message #245681] |
Sat, 29 March 2014 15:04   |
John Hunt
Messages: 70
Registered: January 2011
Location: Orange County, CA
Karma: 0
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Thanks Sean for the updates and details. Will take a good look at your schematic - thanks for that.
Counting my lucky stars today as I am a 1/2 mile from the epicenter of a pretty decent earthquake we had last night and my wheel-less GMC managed to stay planted on the four sets of cribbing in the garage. Coulda been ugly. Good news is we got rid of some knick-knacks that were past their prime, only hassle was a broken water supply line in the house.
Anyway, I thought a lot about the LOP switch set-up and I think I'm going to try using an electronic solution that utilizes a tach signal to switch the pumps on or off and also features a 3 second prime feature when you first turn the ignition on. Here's what I'm thinking about:
http://www.revolutionelectronics.com/Fuel_Pump.html
And I think I'll also add a fuel pressure gauge on the dash to keep track of the in-tank pumps.
Now back to fixing things non-GMC related.
good luck -
John
1976 Eleganza II, Orange County, CA
1976 Eleganza II,
1969 Lotus Elan Plus 2,
1978 Merlyn Formula Ford,
1981 Lola Sports 2000
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| Re: Fuel system upgrade progress [message #246576 is a reply to message #242902] |
Sun, 06 April 2014 20:03 |
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SeanKidd
Messages: 747
Registered: June 2012
Location: Northern Neck Virginia
Karma: 4
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Update: tanks are done, installed new lock rings and o rings, pressure tested with soapy water all good. Tank straps mounted (plasti-dip on the tank side and grade 8 button head hex bolts and lock nuts). I assembled my pumps, filters and check valves. I was hoping to get the pumps closer to the floor, but after fiddling for too long, I accepted the fact that they will be a wee bit exposed. The torsion bar yoke is still far lower than the filter. I'm not too worried. the vapor lines were challenging.
http://www.gmcmhphotos.com/photos/data/6560/image148.jpg
http://www.gmcmhphotos.com/photos/data/6560/image147.jpg
http://www.gmcmhphotos.com/photos/data/6560/image143.jpg
http://www.gmcmhphotos.com/photos/data/6560/image140.jpg
http://www.gmcmhphotos.com/photos/data/6560/image142.jpg
Sean and Stephanie
73 Ex-CanyonLands 26' #317 "Oliver"
Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, P.Huber TBs, 3.70:1 LSD Honda 6500 inverter gen.
Colonial Travelers
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| Re: Fuel system upgrade progress [message #246583 is a reply to message #245681] |
Sun, 06 April 2014 20:39 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| SeanKidd wrote on Sat, 29 March 2014 14:37 |
Ok, here is my strainer...in lieu of socks, I'm using this #30 mesh stainless steel. I had hoped on brazing or soldering it...no chance, nothing would stick to it and my mig burned right through. I wound up painstakingly weaving the ends of the wires through and bending them back. The external 100 micron filter will protect the pump, and the 10 micron paper element in the Delco filter will get the small stuff.
http://www.gmcmhphotos.com/photos/data/6560/image136.jpg
Here it is on the sender, I will probably put a worm clamp on to keep it in place.
http://www.gmcmhphotos.com/photos/data/6560/image137.jpg
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Sean,
Where did you source that level sender. I didn't find anything like that in my searches.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Fuel system upgrade progress [message #246584 is a reply to message #242902] |
Sun, 06 April 2014 20:49 |
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SeanKidd
Messages: 747
Registered: June 2012
Location: Northern Neck Virginia
Karma: 4
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Senior Member |
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Matt, $22 was worth a shot, had to do some finagling to get the float right, I'm at 3 ohms at bottom and 88 at full, gmc guage reads exactly full, and low level sensor works. I installed the resistor on stand-offs go get the float on the correct side and not interfere with the pick-up. Sorry I cannot get the link to paste properly.
eBay item 260933871251
GM Fuel level sender, Universal 6”- 24” adjustable, 0-90 ohms
Sean and Stephanie
73 Ex-CanyonLands 26' #317 "Oliver"
Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, P.Huber TBs, 3.70:1 LSD Honda 6500 inverter gen.
Colonial Travelers
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| Re: [GMCnet] Fuel system upgrade progress [message #246592 is a reply to message #246583] |
Sun, 06 April 2014 21:13 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Matt,
You may find this a better solution:
http://www.ebay.com/itm/Two-line-sending-unit-GM-Full-size-cars-1973-1976-Stainless-Steel-W-O-AC-/330836201902?pt=Vintage_Car_Truck_Parts_Accessories& amp;hash=item4d075fd1ae
http://goo.gl/9XTBf2
I bought a very similar one, with 3 lines (I didn't realize the 2-line was
available), recently and when I had the Main tank down a few weeks ago made
it fit. Not difficult at all: I cut the 3rd line off, folded it back on
itself, and sealed the cut end with JB Weld. To make it fit the tank, I
cut off the sock and bent that end just a little to match the OEM a little
better. A compression union replaced the excess standpipe above the level
sensor and enabled me to aim the pickup end into the lowest part of the
tank bottom. I had to straighten and re-bend the float rod to achieve full
travel for our tank. A couple of trivial modifications to the positioning
and grounding ears on the mounting flange with a Dremel made it fit
perfectly. The long SS tubes reach at least 1/2 way to the edge of our
tanks, allowing plenty of room for whatever extension attachment method you
choose to employ. Notice that the new seal and ring are included.
Here's the link to the exact 3-link version I ordered:
http://goo.gl/XWLBS9
I've got about 2400 miles on the installation now and can finally guess
pretty accurately how much gas the tanks will hold based on the gauge
reading.
Ken H.
On Sun, Apr 6, 2014 at 8:39 PM, Matt Colie wrote:
>
>
> SeanKidd wrote on Sat, 29 March 2014 14:37
> > Ok, here is my strainer...in lieu of socks, I'm using this #30 mesh
> stainless steel. I had hoped on brazing or soldering it...no chance,
> nothing would stick to it and my mig burned right through. I wound up
> painstakingly weaving the ends of the wires through and bending them back.
> The external 100 micron filter will protect the pump, and the 10 micron
> paper element in the Delco filter will get the small stuff.
> >
> > http://www.gmcmhphotos.com/photos/data/6560/image136.jpg
> >
> >
> > Here it is on the sender, I will probably put a worm clamp on to keep
> it in place.
> > http://www.gmcmhphotos.com/photos/data/6560/image137.jpg
>
> Sean,
>
> Where did you source that level sender. I didn't find anything like that
> in my searches.
>
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: Fuel system upgrade progress [message #246593 is a reply to message #242902] |
Sun, 06 April 2014 21:15 |
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SeanKidd
Messages: 747
Registered: June 2012
Location: Northern Neck Virginia
Karma: 4
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Senior Member |
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Doughhhh! Thanks.
Sean and Stephanie
73 Ex-CanyonLands 26' #317 "Oliver"
Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, P.Huber TBs, 3.70:1 LSD Honda 6500 inverter gen.
Colonial Travelers
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