Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> How much fuel pressure do you run?, 28, 30, 32 psi? more?
nebreitling
post Nov 21 2003, 04:47 PM
Post #1


Member Emeritus
****

Group: Members
Posts: 3,314
Joined: 26-March 03
From: San Francisco
Member No.: 478
Hi all

i'm just wondering how much fuel pressure everyone runs in their F/I 914's (Djet). are there benefits from increasing the fuel pressure from the stock value?

nathan (IMG:style_emoticons/default/beer.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Brad Roberts
post Nov 21 2003, 04:54 PM
Post #2


914 Freak!
***************

Group: Members
Posts: 19,148
Joined: 23-December 02
Member No.: 8
Region Association: None
It will run rich if you increase the pressure. Leave it between 29-30.


B
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
nebreitling
post Nov 21 2003, 05:12 PM
Post #3


Member Emeritus
****

Group: Members
Posts: 3,314
Joined: 26-March 03
From: San Francisco
Member No.: 478
cool, thanks

i just bought an in-line fuel pressure gauge that i'll keep in the engine bay.

full tune up and crane xr700 install this weekend.

thanks again, nice avatar

nathan
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Brad Roberts
post Nov 21 2003, 05:30 PM
Post #4


914 Freak!
***************

Group: Members
Posts: 19,148
Joined: 23-December 02
Member No.: 8
Region Association: None
Um.. you dont need a inline guage. You have a "test port" on one of the fuel rails. I dont recommened leaving a fuel gauge in the engine compartment unless it is liquid filled and hard mounted to something.


b
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
nebreitling
post Nov 21 2003, 08:16 PM
Post #5


Member Emeritus
****

Group: Members
Posts: 3,314
Joined: 26-March 03
From: San Francisco
Member No.: 478
i don't understand the "test port" on the fuel rail

this is what i ordered:

fitting

and

thistoo

it is liquid filled/mechanical, i was going to splice it into the fuel line near the fuel pressure regulator

my fuel rail looks like this (attached)

thanks, brad. i appreciate (and obviously respect) your advice...

nathan


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Brad Roberts
post Nov 21 2003, 08:26 PM
Post #6


914 Freak!
***************

Group: Members
Posts: 19,148
Joined: 23-December 02
Member No.: 8
Region Association: None
One side of your fuel rail has a extra nipple hanging off of it for the cold start injector (that you will never use).


B
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Brad Roberts
post Nov 21 2003, 08:28 PM
Post #7


914 Freak!
***************

Group: Members
Posts: 19,148
Joined: 23-December 02
Member No.: 8
Region Association: None
You ordered the correct pieces (good job).. but the inline piece wont work with your METRIC fuel line. If you force it.. you stand a chance of splitting the ends that you push onto this.. this is of course assuming you have the proper fuel lines on the car.


B
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
nebreitling
post Nov 21 2003, 08:40 PM
Post #8


Member Emeritus
****

Group: Members
Posts: 3,314
Joined: 26-March 03
From: San Francisco
Member No.: 478
(IMG:style_emoticons/default/wink.gif) i see.... incidentally, i must have two of the same-sided fuel rail -- as i don't have an extra nipple. on my car, i mean.

errr, on my self too. although once, i was with this chick (true story), and let's just say that there was a mole which appeared to be....


thanks (IMG:style_emoticons/default/pray.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Brad Roberts
post Nov 21 2003, 08:41 PM
Post #9


914 Freak!
***************

Group: Members
Posts: 19,148
Joined: 23-December 02
Member No.: 8
Region Association: None
No cold start valve fuel connection ??


B
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
nebreitling
post Nov 21 2003, 09:35 PM
Post #10


Member Emeritus
****

Group: Members
Posts: 3,314
Joined: 26-March 03
From: San Francisco
Member No.: 478
HA (IMG:style_emoticons/default/laugh.gif)

i'm a damn idiot.... of course there's a third nipple on the driver's side fuel rail! i've seen the thing hundreds of times -- hell, i just replaced the fuel lines a couple months ago. sorry, i'm not quite as incompetent as i might at first appear (almost, though)

hey, that makes me think: i could pretty easily weld a 1/8" NPR fitting onto this 3rd nipple (everytime i say that i get freaked out and remember that mole) and very cleanly mount the gauge to that.... (IMG:style_emoticons/default/idea.gif)

not like this car has ever had a cold start in its life

n
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Brad Roberts
post Nov 21 2003, 09:39 PM
Post #11


914 Freak!
***************

Group: Members
Posts: 19,148
Joined: 23-December 02
Member No.: 8
Region Association: None
By a second pipe setup from somebody and wash it thoroughly before welding.

That way if you screw it up.. you can leave the current one in place.

I like the idea of welding a fitting to it.


B
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
fiid
post Nov 22 2003, 06:19 AM
Post #12


Turbo Megasquirted Subaru Member
****

Group: Members
Posts: 2,827
Joined: 7-April 03
From: San Francisco, CA
Member No.: 530
Region Association: Northern California
Just to be a word of caution - you aren't supposed to weld fuel tanks because the fuel soaks intp the metal.... I don't know if something similar would happen with a fuel delivery tube, or how dramatic the effect would be, but take care.

(IMG:style_emoticons/default/welder.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
nebreitling
post Nov 22 2003, 11:30 AM
Post #13


Member Emeritus
****

Group: Members
Posts: 3,314
Joined: 26-March 03
From: San Francisco
Member No.: 478
thanks for the warning, fiid (IMG:style_emoticons/default/blowtorch.gif)

i did something like this once before on my old morris minor (not the tank) -- i think just the fuel rail piece would be okay as long as it got a thorough wash, dry, wash, dry, and then a test pass with a torch.

i have a friend (mentor, really) who used to weld fuel tanks. crazy motherf-cker. he would top off the tank COMPLETELY and then weld. the theory was that no O2, no explosion. can't believe he's still around.

of course, gas tanks need to be steam cleaned before welding. or better yet, taken to a professional (IMG:style_emoticons/default/welder.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Steve Thacker
post Nov 24 2003, 03:02 PM
Post #14


UMMMPH Yea Baby Yea ! UMMMPH
***

Group: Members
Posts: 1,089
Joined: 8-January 03
From: Pickerington, Ohio
Member No.: 113
Region Association: Upper MidWest
That welding full tank trick doesn't work 100%. I once was welding with an arc under my moms old grabber to fix the muffler. I laid the rod down to reposition my angle. When I scooted around, my arm caught the wand and flipped the rod onto the bottom of the tank. The next thing I know I see these purty flashing lights. The tank went up and blew ole Stevie about 40 ft away. The great thing was I still had my eyebrows! The car needless to say went to a better place....instantly. The lady in the ambulance was real religious and thought the Lord was looking out for me! Uh huh lady why you don't go and tell my mom that and just maybe she won't beat the living hell out of me!!! (IMG:style_emoticons/default/devil.gif) LOL

I'm also suprised that they didn't pick your friend's / mentor's ass up in Dayton,..err a piece of him for speeding.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
nebreitling
post Nov 24 2003, 03:35 PM
Post #15


Member Emeritus
****

Group: Members
Posts: 3,314
Joined: 26-March 03
From: San Francisco
Member No.: 478
HA!

you're a lucky sob too, my friend...
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Steve Thacker
post Nov 24 2003, 03:43 PM
Post #16


UMMMPH Yea Baby Yea ! UMMMPH
***

Group: Members
Posts: 1,089
Joined: 8-January 03
From: Pickerington, Ohio
Member No.: 113
Region Association: Upper MidWest
Man don't you know it!

I still got my ass beat off once my mother realized that I was OK....Figures LOL

And for my next trick ladies and germs I will perform my death defying welding trick. Please hide the eyes of your little ones. Based upon the last test this could get messy LOL
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 9th May 2024 - 02:34 AM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...