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
> Fuel Filter - before or after pump?, seen it both ways
BCinSC
post May 31 2005, 07:19 AM
Post #1


Nothing but Trouble
**

Group: Members
Posts: 138
Joined: 8-June 03
From: Wakefield, MA
Member No.: 800
Region Association: North East States



I figured before to prevent tank gunk from ruining pump, but pump gunk, should it ever fail, could kill FI.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
d914
post May 31 2005, 07:42 AM
Post #2


Advanced Member
****

Group: Members
Posts: 2,337
Joined: 12-July 03
From: Atlanta, ga
Member No.: 904
Region Association: South East States



I'm not a FI guru, insert legal qualifiers here, my car is carb'd and I have filters on both sides. I hate dirt jets...
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
BCinSC
post May 31 2005, 08:05 AM
Post #3


Nothing but Trouble
**

Group: Members
Posts: 138
Joined: 8-June 03
From: Wakefield, MA
Member No.: 800
Region Association: North East States



Is silly OEM square filter required, or can I use some other?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
d914
post May 31 2005, 08:09 AM
Post #4


Advanced Member
****

Group: Members
Posts: 2,337
Joined: 12-July 03
From: Atlanta, ga
Member No.: 904
Region Association: South East States



FI or carb???? if FI i'll differ, my quick answer would be there are after market filters out there. Carb no problem...
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Bob
post May 31 2005, 08:36 AM
Post #5


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None



Carbs run on low pressure so the cheapo clear plastic ones will work.

FI runs on signifcantly higher pressure and if on the pump side needs one designed for FI. They are usually metal clad.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
CptTripps
post May 31 2005, 08:44 AM
Post #6


:: Punch and Pie ::
****

Group: Members
Posts: 3,584
Joined: 26-December 04
From: Mentor, OH
Member No.: 3,342
Region Association: Upper MidWest



I have the clear-plastic FRAM one AFTER the pump. I have the pump up front, and the filter in the engine bay. Only because I didn't have room up front. I think I'm going to re-locate it up front when I re-config the lines. I'll need to pull the tank to do it though.

BTW: I'm running carbs, it'll be different with FI.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rhodyguy
post May 31 2005, 10:15 AM
Post #7


Chimp Sanctuary NW. Check it out.
***************

Group: Members
Posts: 22,192
Joined: 2-March 03
From: Orion's Bell. The BELL!
Member No.: 378
Region Association: Galt's Gulch



before pump. forget those little cone shaped, cheapo, type 1 style filters. jmho.

k

User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Reiche
post May 31 2005, 12:46 PM
Post #8


Member
**

Group: Members
Posts: 169
Joined: 13-October 04
From: Vista, CA
Member No.: 2,934



For FI, always before the pump. Although it's possible, I have never heard of a roller pump failing catastrophically enough to take out the rest of the fuel system. OTOH, inadequate filtration of tank gunk will kill a pump in a few thousand miles. FI roller pumps have very close tolerances and high flow, and their filters need to accommodate both. Use the stock filter (or something equivalent) for stock pumps, always.

As for pumps for carbs, I would check with the manufacturer.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
fadler1
post May 31 2005, 02:58 PM
Post #9


Newbie
*

Group: Members
Posts: 24
Joined: 30-June 04
From: San Diego, CA
Member No.: 2,278



Add one "horror story" which follows one of the previous posts. My '71 was sputtering and stopping without fuel flow so I figured the first cheap thing is the filter (yes the square one). I caused the smallest of constrictions in that crappy PVC line and "voila" killed the pump. Easy to do. Be careful since the silly square thing slips into a welded bracket which on mine was corroded. Long story short, replaced the fuel lines with decent ones (no possible fire hazard), rebuilt pump, recalibrated MPS, new distributor, new electronic point systems and with my hydraulic cam and valves, a much better running machine which needs much less adjustment.

Just be careful with that fuel filter. What seems like a $4.95 fix can turn into a major headache, especially since most of the parts are now obsolete and no longer available even at Pelican.


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

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

 



- Lo-Fi Version Time is now: 31st October 2024 - 05:54 PM