Go Back   MustangForums.com > Ford Mustang Tech > 5.0L (1979-1995) Mustang
Sign in using an external account
Register Forgot Password?
Search


5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Sponsored by Weld Racing


Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 02-22-2006, 09:59 PM   #1
SiGGa
 
Join Date: Oct 2005
Posts: 47
Default fuel pressure on stock 5.0?

I'm going to be installing a new fuel pump/regulator on my '89 GT and i would be much appreciative if anybody could give me any suggestions on fuel pressure

the regulator i'm installing is an adjustable 35-90 PSI and i don't know what the car should be running stock, so if anybody knows that it would be a start, i'm also wondering if there is much play in the setting and what i could go to comfortably without changing injectors for now.

I'm anxiously awaiting edelbrock's completion and release of their pro-tuner EFI system (#3671)that was due out in spring of 05 but for now, as my fuel pump has taken a **** on itself, i'll start with a pump (edelbrock #17932)and regulator (#1729)


just for those who are curious my future plans to match this start include an edelbrock intake #2945, throttle body #3826, egr plate #3829, undecided cam - not too racey for the street but something that can be worked up to some competition at the drag strip, heads haven't been decided on either but im currently leaning toward edelbrock if not for anything but a matching top end

As for the bottom end, i'll send the car on down to Race Engineering for a wonderful couple weeks of valvetrain work and gutting replacing polishing porting boring and balancing, and to have any upper end work that i can't do such as installing my intake (which needs to be polished to fit as it is shipped raw)

i'm not looking to have the fastest thing at the drag strip, just the fastest streetable thing. The reason i'll be able to use the setup i'm going with on the street will be thanks to the pro-tuner package which should allow me to work all the wild stuff out of my motor enough to tame it on the streets, yet be able to tune quickly up to a much more raw-performance oriented set of parameters for a visit to the strip

When it's all said and done my '89 mustang should be able to shove her heavy *** easily into the low 12's completely N/A.
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
__________________
The back of my '89 GT is quite boxy looking, red, and has the name of a civic's worst nightmare engraved in the bumper
SiGGa is offline   Reply With Quote
Old 02-22-2006, 10:11 PM   #2
Crazyfast50stang
5th Gear Member
 
Join Date: May 2004
Location: Redondo Beach, CA
Posts: 2,128
Send a message via AIM to Crazyfast50stang
Default RE: fuel pressure on stock 5.0?

I dont know what you were writing cause I didnt read it all, sorry, but stock fuel pressure should be 38 psi
__________________
2001 Cobra- JLT CAI, Dynomax mufflers, MM full length subframes, Eibach Sportline springs, Steeda CC plates.
Waiting to install: Headers
Waiting to purchase: X-pipe

"Don't Steal, the Government hates competition."

www.cardomain.com/id/legit
Crazyfast50stang is offline   Reply With Quote
Old 02-22-2006, 10:14 PM   #3
SiGGa
 
Join Date: Oct 2005
Posts: 47
Default RE: fuel pressure on stock 5.0?

awesome, thanks that's one major thing i needed to know

can i get by with more? if so, how much more? like i said i don't want to have to change anything yet as it's already coming soon but i want to know how far i can push fuel pressure on a stock set-up

thanks again
__________________
The back of my '89 GT is quite boxy looking, red, and has the name of a civic's worst nightmare engraved in the bumper
SiGGa is offline   Reply With Quote
Old 02-22-2006, 10:27 PM   #4
razarr69
2nd Gear Member
 
Join Date: May 2005
Location:
Posts: 459
Default RE: fuel pressure on stock 5.0?

what makes you think you need more? what mods you running?
razarr69 is offline   Reply With Quote
Old 02-22-2006, 10:39 PM   #5
rsw007
4th Gear Member
 
Join Date: Mar 2005
Vehicle: 91 aod gt
Location: south carolina
Posts: 1,037
Send a message via AIM to rsw007
Default RE: fuel pressure on stock 5.0?

stock H/C/I cars need less fuel. they come from ford rich. my n/a tune was 34psi
__________________
91 gt aod,
12.64@106mph with 248rwhp
ON THE 125 SHOT=11.23@117, 7.07@95 1.43 60ft

videos and pics here:
www.putfile.com/rsw007
rsw007 is offline   Reply With Quote
Old 02-22-2006, 10:54 PM   #6
86HOGT
5th Gear Member
 
86HOGT's Avatar
 
Join Date: Sep 2003
Vehicle: 2005 GT
Location: Rhinelander, WI United States
Posts: 3,100
chevchelious
Default RE: fuel pressure on stock 5.0?

Interesting. I always thought they'd be lean for emissions during that era...
__________________
BLACK 05 Premium GT 5-Speed | Entry Level Mods
86HOGT is offline   Reply With Quote
Old 02-23-2006, 12:32 PM   #7
SiGGa
 
Join Date: Oct 2005
Posts: 47
Default RE: fuel pressure on stock 5.0?

so did i..

no real mods yet so i think my question has been answered. Thanks every1


__________________
The back of my '89 GT is quite boxy looking, red, and has the name of a civic's worst nightmare engraved in the bumper
SiGGa is offline   Reply With Quote
Old 02-23-2006, 12:45 PM   #8
rsw007
4th Gear Member
 
Join Date: Mar 2005
Vehicle: 91 aod gt
Location: south carolina
Posts: 1,037
Send a message via AIM to rsw007
Default RE: fuel pressure on stock 5.0?

well every car is different. but i tuned my fuel pressure and timing on a dynojet dyno. n/a tune ended up being 17* timing and 32-34 psi fuel there was no real change in the two. so i stayed 34psi
here is the final run
http://www.mustangforums.com/photo.a...Type=6&apage=1
__________________
91 gt aod,
12.64@106mph with 248rwhp
ON THE 125 SHOT=11.23@117, 7.07@95 1.43 60ft

videos and pics here:
www.putfile.com/rsw007
rsw007 is offline   Reply With Quote
Old 02-23-2006, 03:45 PM   #9
nitrous_bob
6th Gear Member
 
nitrous_bob's Avatar
 
Join Date: Oct 2005
Vehicle: 1993 notch
Location: st clair shores MI
Posts: 6,028
Default RE: fuel pressure on stock 5.0?

yup, rsw007 is right on the money.

you want to run as lean as possible to make the most power. (too lean is very bad, too phat just slows you down a bit though)
thats why most people don't go so lean. the tradeoff is worth not risking it.

and stock 5.0's run way phat. guys take a stock motor and add an intake , 24 lb inj, and a 255 pump and can't figure out why they are slower.

34-35 would probably be perfect, i have always been under the impression stock is 36 psi.



__________________
'93 calypso notch 6th stang and counting



nitrous oxide is proof there is a GOD and he wants us to be happy
nitrous_bob is offline   Reply With Quote
Old 02-23-2006, 05:48 PM   #10
rsw007
4th Gear Member
 
Join Date: Mar 2005
Vehicle: 91 aod gt
Location: south carolina
Posts: 1,037
Send a message via AIM to rsw007
Default RE: fuel pressure on stock 5.0?

mine stock was 39psi. i put the gauge on it before i installed the adjustable regulator.
__________________
91 gt aod,
12.64@106mph with 248rwhp
ON THE 125 SHOT=11.23@117, 7.07@95 1.43 60ft

videos and pics here:
www.putfile.com/rsw007
rsw007 is offline   Reply With Quote
Old 02-23-2006, 05:48 PM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Tags
1996, 34, 50, 89, 95, cobra, ford, fuel, gt, mustang, pressure, psi, pump, reg, stock

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
supercharger on stock 5.0 ? ponyboy302 5.0L (1979-1995) Mustang 9 09-03-2007 07:20 AM
How to lean out fuel mixture on 93 5.0? WhiteFoxGT 5.0L (1979-1995) Mustang 12 09-17-2006 06:21 PM
Stock 5.0 times PipsBlackStang 5.0L (1979-1995) Mustang 76 05-19-2005 09:47 PM

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 12:25 PM.

© Internet Brands, Inc.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup