Fuel pump relocation front or rear? Type? |
|
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. |
|
Fuel pump relocation front or rear? Type? |
Joec |
Jul 22 2021, 11:40 AM
Post
#1
|
Newbie Group: Members Posts: 16 Joined: 26-April 21 From: Delta, BC Member No.: 25,484 Region Association: None |
Brand new to the 914 world. My car, a 74 2.0 was parked for 25 years, bought as a roller. Now missing the fuel pump( among other stuff) looks like it was plumbed for a 2 port pump anyway as 1 line to the injectors with a return line only at the end of the run, no y connector. I plan to replace all of the fuel lines so now is the time to place the pump. Seems real easy to place on firewall as lots of room there. I have read countless articles but not much recent stuff and most are vague with instructions assuming I have full comprehension of the car, which I don't. It sounds like stainless lines in the tunnel are a must, what fuel pump is suggested? Front or rear?,modify and put in tank?? Suggestions or point me to a current article. Any help really appreciated.
|
ClayPerrine |
Jul 22 2021, 12:45 PM
Post
#2
|
Life's been good to me so far..... Group: Admin Posts: 15,387 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
There is a known issue with vapor lock on 914s. The fuel pump was mounted next to the heat exchangers, and hot weather would vapor lock it. The factory fixed in 75 by moving the pump up front.
I normally buy an Airtex E-8445 pump, and mount it under the fuel tank. Lots of people update the fuel pump using the 75 pump and mounting location. And yes, the stainless steel lines are an absolute must to do 50 year old plastic is risky and can cause fires. Good luck. Clay |
rjames |
Jul 22 2021, 01:20 PM
Post
#3
|
I'm made of metal Group: Members Posts: 3,910 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest |
(IMG:style_emoticons/default/agree.gif)
Move it to the front. |
NARP74 |
Jul 22 2021, 01:34 PM
Post
#4
|
Senior Member Group: Members Posts: 1,048 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains |
I have heard you can get by without the relocation by using some modern heat shield tube around the hottest areas, like DEI or similar. Chris at Tangerine has some experience and sells kits for the lines etc. I have the kit, not installed yet.
|
mlindner |
Jul 22 2021, 01:36 PM
Post
#5
|
Senior Member Group: Members Posts: 1,509 Joined: 11-November 11 From: Merrimac, WI Member No.: 13,770 Region Association: Upper MidWest |
|
advman89 |
Jul 22 2021, 01:40 PM
Post
#6
|
Member Group: Members Posts: 120 Joined: 8-July 19 From: Chicago, IL Member No.: 23,286 Region Association: Upper MidWest |
Just ran this gauntlet.
The 1971 I got--the lines were shot--in fact, I barely touched one of the old lines in the engine bay and it completely disintegrated. Another anecdote--was in Phoenix at a Porsche junkyard and it was full of stacks of burned up 914s. Oh, and the insurance on this 1971 came in higher than my 964...so yea...fires are a thing. I bought the the lines from Tangerine Racing. They were hugely helpful. Also had the relocation instructions/bits from Dr 914 at AutoAtlanta. It was a bit of overkill, but gave me a little flexibility on the mounting at the front. It took me longer than it should have because I didn't have a second set of hands to run the long lines through the tunnel..but with two people a bit of motivation, it's an afternoon if you have everything you need. Couple pics...and while you have that cover off in the front--might as well check to see if you need to replace your master cylinder... someone told me early on...spend the money upfront...or spend the money on the backend to fix everything--but just understand, you'll be spending the money. (IMG:style_emoticons/default/sheeplove.gif) |
willieg |
Jul 22 2021, 05:01 PM
Post
#7
|
Member Group: Members Posts: 130 Joined: 13-August 18 From: Pleasant Hill Member No.: 22,389 Region Association: Northern California |
I took some pages out of Tygaboy’s installation for my fuel pump installation. I bought a Tanks GPA2 fuel pump from Summit and drilled a large 3+“ hole in the top of the fuel tank, directly above the sump that is in the bottom of the fuel tank. The GPA2 fuel pump slid into the hole and the bottom of the fuel pump rests in the sump. Very tidy installation. Tygaboy being somewhat “touched” did another fuel pump installation which is also worthy of a think.
|
KSCarrera |
Jul 24 2021, 03:19 AM
Post
#8
|
Member Group: Members Posts: 306 Joined: 31-January 19 From: UK Member No.: 22,846 Region Association: England |
|
914Sixer |
Jul 24 2021, 06:04 AM
Post
#9
|
914 Guru Group: Members Posts: 8,862 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
PLEASE do not use worm gear clamps on fuel lines. Use fuel line band clamps only
Attached image(s) |
mlindner |
Jul 25 2021, 04:36 AM
Post
#10
|
Senior Member Group: Members Posts: 1,509 Joined: 11-November 11 From: Merrimac, WI Member No.: 13,770 Region Association: Upper MidWest |
Thanks 914Sixer, will change out. Mark
|
930cabman |
Jul 25 2021, 06:50 AM
Post
#11
|
Advanced Member Group: Members Posts: 2,996 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
Welcome aboard mate. I agree with the replacement of the original fuel lines and moving the pump to the front. How is the level of rust on your new 914?
|
Joec |
Aug 7 2021, 02:41 PM
Post
#12
|
Newbie Group: Members Posts: 16 Joined: 26-April 21 From: Delta, BC Member No.: 25,484 Region Association: None |
Car is rust free, had maybe 1 paint job in its life. Small hit in rear quarter, previous hit in front end. Hoping to get it running soon to assess the engine's health.
|
SKL1 |
Aug 7 2021, 09:15 PM
Post
#13
|
Senior Member Group: Members Posts: 1,596 Joined: 19-February 11 From: north Scottsdale Member No.: 12,732 Region Association: Upper MidWest |
Use a rotary pump in the front with Chris' (Tangerine Racing) lines in the tunnel... job done!
|
Joec |
Sep 21 2021, 04:12 PM
Post
#14
|
Newbie Group: Members Posts: 16 Joined: 26-April 21 From: Delta, BC Member No.: 25,484 Region Association: None |
All ready to order new stainless fuel lines for the tunnel and after talking to Auto Atlanta they suggest not replacing the lines in the tunnel as they are not prone to failure. Any thoughts? I had planned on replacing all of the fuel lines.
|
brant |
Sep 21 2021, 04:17 PM
Post
#15
|
914 Wizard Group: Members Posts: 11,602 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
agree with all of the above.
the front location solves the vapor lock issue also.... these pumps really are pushers... not pullers... so although the factory got away with motor bay installation... its because they kept the pump low and allowed gravity to do the pulling for the pump. front mounted is the solution and the reason the factory used that location starting in 1975 |
Jamie |
Sep 21 2021, 05:09 PM
Post
#16
|
Senior Member Group: Members Posts: 1,025 Joined: 13-October 04 From: Georgetown,KY Member No.: 2,939 Region Association: South East States |
agree with all of the above. the front location solves the vapor lock issue also.... these pumps really are pushers... not pullers... so although the factory got away with motor bay installation... its because they kept the pump low and allowed gravity to do the pulling for the pump. front mounted is the solution and the reason the factory used that location starting in 1975 And don't neglect to install fuel filters, I mounted before and after the new front mounted pump to catch any "stuff" from the old fuel tank. |
jcd914 |
Sep 21 2021, 05:59 PM
Post
#17
|
Advanced Member Group: Members Posts: 2,081 Joined: 7-February 08 From: Sacramento, CA Member No.: 8,684 Region Association: Northern California |
All ready to order new stainless fuel lines for the tunnel and after talking to Auto Atlanta they suggest not replacing the lines in the tunnel as they are not prone to failure. Any thoughts? I had planned on replacing all of the fuel lines. Not advise I would take. The tunnel lines do fail and then you are sitting in a car with fuel inside with you. Not someplace I want to be. They are almost 50 year old plastic not designed to hold the pressure of the Fuel Injection system, just the weight of the fuel in the tank. If you move the pump up front you are now running high pressure fuel through the plastic line. Does AA even sell the SS lines? Jim |
windforfun |
Sep 21 2021, 06:07 PM
Post
#18
|
Senior Member Group: Members Posts: 1,771 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None |
All ready to order new stainless fuel lines for the tunnel and after talking to Auto Atlanta they suggest not replacing the lines in the tunnel as they are not prone to failure. Any thoughts? I had planned on replacing all of the fuel lines. Not advise I would take. The tunnel lines do fail and then you are sitting in a car with fuel inside with you. Not someplace I want to be. They are almost 50 year old plastic not designed to hold the pressure of the Fuel Injection system, just the weight of the fuel in the tank. If you move the pump up front you are now running high pressure fuel through the plastic line. Does AA even sell the SS lines? Jim Several older mechanics from Europe who have worked on 914s for many years have told me that the plastic fuel lines are bullet proof. Go figure. The added pressure may be an issue. BTW, it's advice, not advise. |
windforfun |
Sep 21 2021, 06:09 PM
Post
#19
|
Senior Member Group: Members Posts: 1,771 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None |
Joec, mine in a 914-6 GT Tribute for track but still streetable. For easy access I put the fuel pump in the front trunk. Best, Mark People tell me that these kind of hose clamps produce leaks. To that I say it depends upon the kind of hose that you're using. I've used these kind of clamps for decades with no issues whatsoever. |
windforfun |
Sep 21 2021, 06:11 PM
Post
#20
|
Senior Member Group: Members Posts: 1,771 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None |
|
Lo-Fi Version | Time is now: 17th April 2024 - 01:03 PM |
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 ... |