Author Topic: fuel pressure question  (Read 1550 times)

0 Members and 1 Guest are viewing this topic.

phi564

  • Offline Rock Crawl'n
  • **
  • Turtle Points: -12
  • Male Posts: 54
  • Member since Jul '05
  • Crawlin in KY
    • View Profile
    • high clearance offroad
fuel pressure question
« on: Jul 17, 2007, 08:10:58 AM »
while doing my SAS this weekend i had to pull the fuel tank to weld the spring hanger in the back, then i discovered this nice unforseen problem.


i was think'n for now i'm gonna put some rubber fuel line in there, and replace the whole think in a little bit with a fuel cell in the bed, but i don't know if the rubber line would hold the pressure.

does anyone know if this will work or do i just need to bite the bullet and buy a sender unit for now ($117, OUCH).

thanks for any help,
chris
01 Dodge 2500 Cummins dd/ tow rig
'90 toyota w/ 4.3 on propane/th350/toy duels
fj80 axles, 39" BFG krawlers, psc full hydro, 4.10's, detroit front, welderd rear



It's better to ask for forgiveness than permission

auckman

  • Offline Rock Crawl'n
  • **
  • Turtle Points: 0
  • Posts: 31
  • Member since Dec '06
    • View Profile
Re: fuel pressure question
« Reply #1 on: Jul 17, 2007, 09:10:53 AM »
you have to buy the high pressure fuel line, but that would work..  i think those run like 50-80 lbs pressure (for the rubber line)
giggity

83LotsOfun

  • Offline Rock Crawl'n
  • **
  • Turtle Points: 0
  • Male Posts: 29
  • Member since Aug '06
    • View Profile
Re: fuel pressure question
« Reply #2 on: Jul 17, 2007, 10:21:11 AM »
Just get the rubber line for a EFI system it should hold.  It will have nylon braiding through the rubber. I run it and have no fuel line issues.
Take it easy and if its easy, take it twice

BigMike

  • Administrator
  • Online Gold Turtle Award
  • *
  • Turtle Points: 1619
  • Male Posts: 17,994
  • Member since Apr '02
  • 511:1 Club
    • View Profile
    • Bone-Stock Plane-Jane 1981 Shortbed Pickup
Re: fuel pressure question
« Reply #3 on: Jul 17, 2007, 11:14:20 AM »
Go to a wrecking yard and just get another used one? It can't be too much for the whole assembly, fuel pump and sender included. I've bought an entire gas tank complete (including fuel pump and sender) for $75-

Just for reference, fuel pressure under closed throttle should be about 30-35 psi and under full throttle (or zero vacuum) it should be between 35-45 psi.

My 3RZ came out of a T100, and the book called for a T100:
31-37 psi at idle
38-44 psi at WOT

I am using a single turbo Supra (7M-GTE) fuel pump, and the book calls for it:
23-30 psi at idle
33-40 psi at WOT

And my actual reading with my 3RZ and Supra Turbo fuel pump is:
39 psi at idle
46 psi at WOT
New Instagram: @SlowestTacoma

Check out our new Rock Crawling Videos!
2016 56-speed 580:1 Triple T/Case 3rd gen Tacoma Rock Crawler   
1981 36-speed 511:1 3RZ-FE Rock Crawler
1987 6-speed Supercharged 4A-GZE MR2
Things are only impossible until they are not.
"The worst of both worlds, the best of neither." -abnormaltoy
"An informed question. But difficult to answer. I am what you see." -Nanaki

phi564 [OP]

  • Offline Rock Crawl'n
  • **
  • Turtle Points: -12
  • Male Posts: 54
  • Member since Jul '05
  • Crawlin in KY
    • View Profile
    • high clearance offroad
Re: fuel pressure question
« Reply #4 on: Jul 17, 2007, 11:17:37 AM »
thanks guy, i've got some guys looking for used one right now.

chris
01 Dodge 2500 Cummins dd/ tow rig
'90 toyota w/ 4.3 on propane/th350/toy duels
fj80 axles, 39" BFG krawlers, psc full hydro, 4.10's, detroit front, welderd rear



It's better to ask for forgiveness than permission

 
 
 
 
 

Related Topics

4 Replies
5993 Views
Last post Nov 27, 2005, 03:05:03 AM
by Fongs
2 Replies
4429 Views
Last post Apr 20, 2006, 08:04:21 PM
by dieselsmoke
1 Replies
999 Views
Last post May 05, 2007, 09:06:20 PM
by brainlessfool
6 Replies
1201 Views
Last post Apr 30, 2008, 09:32:27 PM
by DontStall Rockcrwl
2 Replies
5653 Views
Last post Jun 24, 2008, 09:01:45 PM
by 82 HiLux