Fordmods Logo

Fuel pump pressure 

 

Page 1 of 1 [ 9 posts ] 

 
 Post subject: Fuel pump pressure
Posted: Wed Jan 02, 2013 12:48 am 
Fordmods Newbie
Offline
User avatar

Age: 50

Posts: 8

Joined: 24th Nov 2012

Gallery: 9 images

Ride: '86 Ford F150

Location: Wodonga
VIC, Australia

I'm putting an AUII XR8 motor into my 86 F150 and need to know what type of fuel pump will be required and what pressure is needed for the injection system to be happy. I can't fit an internal pump due to tank restrictions. What pressure does the system normally run? and is there a problem turning the pump off while running on LPG? What role does the pressure switch play?
Thanks in advance
Top
 Profile  
 
 
 Post subject: Re: Fuel pump pressure
Posted: Thu Jan 03, 2013 4:32 pm 
Tyre Shredder
Offline
User avatar

Age: 26

Posts: 303

Joined: 5th Oct 2012

Gallery: 3 images

Ride: 99 au ute

Location: Perth
WA, Australia

the pump will output around 225 idel and 300 kpa full blast

 

_________________

Au series 1 ute. T5 manual, 2.5" redback zorst, Xtreme HD clutch

Top
 Profile  
 
 
 Post subject: Re: Fuel pump pressure
Posted: Fri Jan 04, 2013 12:38 pm 
Fordmods Newbie
Offline
User avatar

Age: 50

Posts: 8

Joined: 24th Nov 2012

Gallery: 9 images

Ride: '86 Ford F150

Location: Wodonga
VIC, Australia

Thanks, that's easy within the specs of the pump I have found for the job. Cheers
Top
 Profile  
 
 
 Post subject: Re: Fuel pump pressure
Posted: Fri Jan 04, 2013 4:14 pm 
Technical Contributor
Offline
User avatar

Age: 28

Posts: 3705

Joined: 27th Sep 2006

Gallery: 20 images

Ride: ED Falcon

Power: 133 rwkw

Location: Leeton
NSW, Australia

What size fuel reg doe the XR8 run?

You need to be able to deliver that pressure... Plus you have a fuel filter between the rail and pump so you'll need more pressure at the pump again...

Have a look at a Bosch 023 or the Walbro equivalent intank pump to suit this engines... Find the specs and then match that on an external pump...

I think the fuel pump itself is capable of delivering a lot more than 300kpa... That's fuel rail pressure...

Cheers,
Tim

 

_________________

93 Red ED 5spd Manual Build Thread

Performance: Complete AUII VCT Wiring & Power Train, Pacey Headers, 2.5" Exhaust, Exedy Clutch, DBA Rotors
Visuals: FG XR Wheel, XR Front, 17's, BA 5 Spd Shifter, BA Ghia Window Switches, NL Cluster
Tunes: 8" Pioneer Sub, JBL Speakers, Clarion Double DIN Headunit

Top
 Profile  
 
 
 Post subject: Re: Fuel pump pressure
Posted: Fri Jan 04, 2013 4:38 pm 
Technical Contributor
Offline
User avatar

Age: 28

Posts: 3705

Joined: 27th Sep 2006

Gallery: 20 images

Ride: ED Falcon

Power: 133 rwkw

Location: Leeton
NSW, Australia

Ok...

Back after doing a stack of reading...

Walbro (because the Bosch wesbite is useless) use the GSS342 pump their AU replacement cradle...

The GSS342 pump is the high pressure version of the 255lph pump...

So one page says that at 80psi (551kpa) the 255lph high pressure pump will flow 210lph
A different page says all 255lph high pressure pumps flow 255lph at 50psi (345kpa)
it also says all 255lph pumps should flow about 285lph at 0psi...

So if your pump can match the intank replacement to suit the XR8 I think you'll be pretty right...

Cheers,
Tim

 

_________________

93 Red ED 5spd Manual Build Thread

Performance: Complete AUII VCT Wiring & Power Train, Pacey Headers, 2.5" Exhaust, Exedy Clutch, DBA Rotors
Visuals: FG XR Wheel, XR Front, 17's, BA 5 Spd Shifter, BA Ghia Window Switches, NL Cluster
Tunes: 8" Pioneer Sub, JBL Speakers, Clarion Double DIN Headunit

Top
 Profile  
 
 
 Post subject: Re: Fuel pump pressure
Posted: Fri Jan 04, 2013 4:44 pm 
Fordmods Newbie
Offline
User avatar

Age: 50

Posts: 8

Joined: 24th Nov 2012

Gallery: 9 images

Ride: '86 Ford F150

Location: Wodonga
VIC, Australia

Thanks Tim. The pump specs says 200lph @ 5bar. I was going to fit the filter near the tank before the pump. Any reason why that won't work?
Top
 Profile  
 
 
 Post subject: Re: Fuel pump pressure
Posted: Fri Jan 04, 2013 4:51 pm 
Technical Contributor
Offline
User avatar

Age: 28

Posts: 3705

Joined: 27th Sep 2006

Gallery: 20 images

Ride: ED Falcon

Power: 133 rwkw

Location: Leeton
NSW, Australia

Ahhhh... Dunno... Only familiar with intank pumps... I'd email the distributor and ask if the pump has the ability to such through a blocked filter... I know EFI pumps push through a blocked filter ok... Be a real bugger if your filter gets only a little blocked and the pump isn't designed to suck against a blocked filter and starts to cut out on you...

Someone else may know more on this too...

So your pump is 200lph at 500kpa and the Walbro one is 210lph at 550kpa so not that far off... Seems ok... I'd just check with the manufacturer is possible where the fuel filter should go...

Cheers,
Tim

 

_________________

93 Red ED 5spd Manual Build Thread

Performance: Complete AUII VCT Wiring & Power Train, Pacey Headers, 2.5" Exhaust, Exedy Clutch, DBA Rotors
Visuals: FG XR Wheel, XR Front, 17's, BA 5 Spd Shifter, BA Ghia Window Switches, NL Cluster
Tunes: 8" Pioneer Sub, JBL Speakers, Clarion Double DIN Headunit

Top
 Profile  
 
 
 Post subject: Re: Fuel pump pressure
Posted: Fri Jan 04, 2013 6:00 pm 
Fordmods Newbie
Offline
User avatar

Age: 50

Posts: 8

Joined: 24th Nov 2012

Gallery: 9 images

Ride: '86 Ford F150

Location: Wodonga
VIC, Australia

No worries, if after the pump is normal I'll just go with that. I hadn't considered the possible sucking problem. I don't need to create issues...
Top
 Profile  
 
 
 Post subject: Re: Fuel pump pressure
Posted: Fri Jan 04, 2013 6:06 pm 
Technical Contributor
Offline
User avatar

Age: 28

Posts: 3705

Joined: 27th Sep 2006

Gallery: 20 images

Ride: ED Falcon

Power: 133 rwkw

Location: Leeton
NSW, Australia

May be right... I know the old man's carby car has it before the mechanical pump... I know some pumps don't pump well against suction... Just don't know about fuel pumps... I'd still email the manufacturer and see what they say...

Cheers,
Tim

 

_________________

93 Red ED 5spd Manual Build Thread

Performance: Complete AUII VCT Wiring & Power Train, Pacey Headers, 2.5" Exhaust, Exedy Clutch, DBA Rotors
Visuals: FG XR Wheel, XR Front, 17's, BA 5 Spd Shifter, BA Ghia Window Switches, NL Cluster
Tunes: 8" Pioneer Sub, JBL Speakers, Clarion Double DIN Headunit

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 9 posts ] 

Who is online

Users browsing this forum: No registered users and 6 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Sat Dec 16, 2017 1:35 am All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names