1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Possible to relocate fuel pump?

Thread Tools
 
Search this Thread
 
Old Jul 15, 2013 | 01:20 PM
  #1  
brentmoto's Avatar
Thread Starter
Full Member
 
Joined: Jan 2013
Posts: 44
Likes: 0
From: Kaneohe, Hawaii
HI Possible to relocate fuel pump?

Hey guys I was wondering if it was possible/if anyone has relocated their fuel pumps on their first gen. The reason I want to relocate mines is because it is the lowest point on my car and I wanted to lower my car a lot and I dont want to have to worry about hitting the fuel pump.
Reply
Old Jul 15, 2013 | 06:41 PM
  #2  
peejay's Avatar
Old [Sch|F]ool
Tenured Member: 20 Years
Liked
Loved
Community Favorite
 
Joined: May 2001
Posts: 12,862
Likes: 568
From: Cleveland, Ohio, USA
It shouldn't be the lowest point.

Name:  GEDC0728.jpg
Views: 33
Size:  80.4 KB

All of this fits up higher than the bottom of the bodyrail.
Reply
Old Jul 16, 2013 | 03:09 AM
  #3  
bikeordie092's Avatar
Senior Member
Tenured Member 05 Years
iTrader: (2)
 
Joined: Feb 2013
Posts: 320
Likes: 1
From: Maryville, TN
^what peejay said
Reply
Old Jul 17, 2013 | 12:29 AM
  #4  
NCross's Avatar
I have a rotary addiction
Tenured Member: 15 Years
iTrader: (18)
 
Joined: Jun 2006
Posts: 4,815
Likes: 24
From: Columbia, Tennessee
I lowered mine 4 inches on REspeed coils and never had a problem. If your dead set on relocating... I've seen people put the pump in the engine bay near the hood latch. Wiring should be easy tonre locate. Then just run an extension barb to connect where the pump used to be.
Heat could be an issue for the pump though in the long run.
Reply
Old Jul 17, 2013 | 12:59 AM
  #5  
Sgt.Stinkfist's Avatar
premix, for f's sake
Tenured Member: 20 Years
iTrader: (6)
 
Joined: Jun 2004
Posts: 1,438
Likes: 5
From: madison, WI
I moved mine to back behind the drivers rear wheel well in the small space next to the gas tank
Reply
Old Jul 17, 2013 | 05:38 PM
  #6  
elwood's Avatar
Rotary Freak
Tenured Member: 20 Years
iTrader: (1)
 
Joined: Mar 2003
Posts: 1,588
Likes: 46
From: Michigan
Originally Posted by NCross
I lowered mine 4 inches on REspeed coils and never had a problem. If your dead set on relocating... I've seen people put the pump in the engine bay near the hood latch. Wiring should be easy tonre locate. Then just run an extension barb to connect where the pump used to be.
Heat could be an issue for the pump though in the long run.
The OEM location is much better than underhood. Aside from the potential issue with heat, fuel pumps are good at pushing / and suck at sucking. Any heat makes the condition worse. The lower and further back, the better.
Reply
Old Jul 17, 2013 | 11:24 PM
  #7  
brentmoto's Avatar
Thread Starter
Full Member
 
Joined: Jan 2013
Posts: 44
Likes: 0
From: Kaneohe, Hawaii
Thanks for the advice guys, its just when I bought my fb the guy had a carter fuel pump on and I noticed it was the lowest point on my car for some reason. I probably only have to ziptie it higher or something but was just curious to see what everyone had to say.
Reply
Old Jul 18, 2013 | 12:12 PM
  #8  
peejay's Avatar
Old [Sch|F]ool
Tenured Member: 20 Years
Liked
Loved
Community Favorite
 
Joined: May 2001
Posts: 12,862
Likes: 568
From: Cleveland, Ohio, USA
Originally Posted by elwood
The OEM location is much better than underhood. Aside from the potential issue with heat, fuel pumps are good at pushing / and suck at sucking. Any heat makes the condition worse. The lower and further back, the better.

And that's the reason for the fuel bomb / moonshine still looking mess of plumbing under my car. The fuel pump in the STOCK location would cavitate trying to pull fuel up and back down, causing all sorts of weird issues, and if it sucked air even once then it would take about 100 miles of cruising for the air to work its way back out... and heat makes the air pocket bigger because air expands when hot...

(The square pump and the return from the engine feed the mini-tank, the mini-tank feeds the pressure pump. Works exactly as intended)
Reply
Old Jul 18, 2013 | 05:07 PM
  #9  
elwood's Avatar
Rotary Freak
Tenured Member: 20 Years
iTrader: (1)
 
Joined: Mar 2003
Posts: 1,588
Likes: 46
From: Michigan
Originally Posted by peejay
And that's the reason for the fuel bomb / moonshine still looking mess of plumbing under my car. The fuel pump in the STOCK location would cavitate trying to pull fuel up and back down, causing all sorts of weird issues, and if it sucked air even once then it would take about 100 miles of cruising for the air to work its way back out... and heat makes the air pocket bigger because air expands when hot...

(The square pump and the return from the engine feed the mini-tank, the mini-tank feeds the pressure pump. Works exactly as intended)
Not sure I'd try to drive that car across the border. Your "mini-tank" looks like a pipe bomb
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
Jul 1, 2023 04:40 PM
Rotospectre
New Member RX-7 Technical
3
Mar 28, 2018 03:33 PM
ChrisRX8PR
Single Turbo RX-7's
21
Oct 18, 2015 04:01 PM
Aramir
New Member RX-7 Technical
4
Sep 8, 2015 08:21 PM




All times are GMT -5. The time now is 12:17 AM.