Need fuel pump pics

[GunGuy]

Hi all,
Currently working on a 1976 Cherokee, my city has left me a nasty-gram that it'll be towed on the 21st of August. If anybody has a pic of their stock mech fuel pump, and where all of the lines go I would appreciate it. In the course of trying to revive the beast after 3 years not running I had to work my way back one connection at a time until I finally figured out I need a new tank. I have got it figured out from tank, but need pictures of the line so I get all hooked up right. If you can't get them to post please let me know so I can post my personal e-mail.

Aaron
reviving a rusty classic.
1976 Cherokee, 360, 2100 MC, Wide ratio 18, Dana 20, and two 44's

[Don S]

..
GunGuy...
... I don’t have any pictures but here are some things to think about.
... Basicly I hammered a hole in the metal fuel tank and J.B. Welded a pick-up tube into the side of the tank. Then doing away with the mechanical pump will allow you to route the fuel lines to cooler areas.
... Running larger size fuel lines (3/8th”metal) outside of the frame works very well with a Holley Red Top pump but it is NOT as safe as far as side impacts (crashes ) are concerned. Also of importants in most cases is using a return line mounted in such a way as to not add heat to the fuel. See;
http://www.ifsja.org/ubb/ultimatebb.php?ubb=get_topic;f=2;t=021144#000007

... Gyrator style electric fuel pump (such as the Holley red-top at over $100) mounted low and close to the fuel tank with a filter between seems to be the best remedy. Fuel pressure regulators are not often required but helpful.

... Installing a fuel pump in the fuel tank is like a two edged sword ! It keeps all of the feed line under pressure(good) but the electric motor adds a lot of heat to the fuel. Today's gasoline has a boiling point ranging from 130 degrees to 430 degrees Fahrenheit" (at sea level)[and can be lowered by about 20% at 14,000 feet]
Replacement on the trail will be more difficult.

... Gyrator pumps will be damaged if run without fuel to cool and lubricate the steel parts. It is a good idea to bench run a gyrator pump with some light oil for a short break-in. In spite of many claims extra fuel pumps in line do create more friction in the fuel lines so that at critical times all must be running at the same time.
... Simply adding an electric pump in line with a mechanical pump is doable but will slightly impede the fuel flow unless the electric-pump is switched on. The electric pump may put a strain on the diaphragm of the mechanical pump. If the diaphragm wears out a hole will develop which could cause a catastrophic amount of fuel to end up in the crankcase quickly.

... A fuel pump for a six cylinder engine should put out 4 to 5 psi and a fuel pump for an eight cylinder engine should put out 5 to 6.5 psi. Both six and eight cylinder fuel pumps should pump one pint in 30 seconds at idle RPM. These are ‘specs’ for 1981 Jeeps per AMC.
... It is a good idea to mount a spare electric fuel pump close to the one your are using. Should a pump fail the hoses could be switched quickly.


Good luck and http://www.michiganjeepers.com/forums/images/graemlins/wave.gif and … CUL.. Don S..

[ August 12, 2003, 10:21 PM: Message edited by: Don S ]

[Max Power]

Dump that mech. fuel pump, and getcherself an electric one...

http://www.rbk3.com/fsj/epump.html

[Don S]

Originally posted by Colonel Angus:
Dump that mech. fuel pump, and getcherself an electric one...

http://www.rbk3.com/fsj/epump.html..
Colonel Angus:
... ... No disrespect intended but you do need to get yourself a real electric fuel pump. The one you have pictured might do for an emergency back up but it will not pump enough to feed my hungry 401 climbing any of the Passes in the San Jaun Mountains. I still have one of those mounted (since 1985) and after the Wagoneer has fully warmed up like running for three hours on a hot Texas 100 degree day you will be hitch hiking to the nearest parts house for another pump.

http://groups.msn.com/ATexasOklahomaJeepClub/ouraycotopic.msnw VAPORLOCK FIXs

Good luck and http://www.michiganjeepers.com/forums/images/graemlins/wave.gif and … CUL.. Don S..

[Max Power]

Don, none taken, you are correct, that is a $25 dollar cheapie, I carry a spare.

I climb plenty of mountain passes {and the trails at the top of those passes} with no problems, I don't have a 'thirsty 401' tho...

It has vaporlocked 1x in the last year, {and I believe that had more to do w/ the reflective hood insulation I installed and the routing of the fuel supply and return lines} so I can't complain. But compared to my old mechanical pump... well there is no comparison... I am very happy with my e-pump.

[Max Power]

oh and BTW, those are some excellent writups on your site, good reading.

[jimmy hat]

i like this electric fuel pump mod. really easy to do too. i think easier than the external pump. you may not have the access hole but i just measured and cut a hole in my floor with a 4" hole saw.
http://cccsc.virtualave.net/pump.html

[Don S]

Originally posted by Colonel Angus:
oh and BTW, those are some excellent writups on your site, good reading...
..
Colonel Angus:
... Thanks for the kind words.

... On the funny side... One time I had three electric hooked up in a row all costing less than $35.00 each. I had separate on-off switches for each one.
... I would start the Wagoneer and run for about an hour with one pump turned on then I’d have to turn on the second one on. After about three hours I’d have to turn on the third one,Yep! three at a time. My Jeep used to know where every shade tree was along side the Texas highways.
... Below... the Five gallon tank is plumbed in the fuel system.
http://www.fullsizejeeps.com/jeeps/files/1963-1983-Wagoneers/elvouray.jpg 2002 at the KOA in OURAY Colorado

Good luck and http://www.michiganjeepers.com/forums/images/graemlins/wave.gif and … CUL.. Don S..