| View previous topic :: View next topic |
| Author |
Message |
agfisher
Joined: 09 May 2007
Posts: 484
Location: West Hartford, CT
|
 Posted: Sat Sep 10, 2016 5:45 am Post subject: A Question about Fuel Line Internal Diameter |
 |
|
This is a question that i have with my ongoing rebuild of my fuel system that is here (http://www.924board.org/viewtopic.php?t=42474).
The fuel line I pulled off of the harness at the rear of the car measures 7mm ID (13mm OD). A lot like this stuff (http://www.germanautoparts.com/productdisplay/51310). This stuff though looks to just be normal reinforced rubber and I was hoping to use something that can deal with today's more modern fuels.
I haven't had great luck finding 30R9 compliant hose in the size that is a direct replacement. Instead I'm finding 5/16 ID hose (7.93mm) that fits my need. Anyone think it's a problem to use the slightly larger size?
_________________
1977 924 N/A Martini Edition
Last edited by agfisher on Sun Sep 25, 2016 1:34 pm; edited 1 time in total |
|
| Back to top |
|
 |
agfisher
Joined: 09 May 2007
Posts: 484
Location: West Hartford, CT
|
| Posted: Sun Sep 25, 2016 1:34 pm Post subject: |
|
|
Bump. Anybody got some input on this?
_________________
1977 924 N/A Martini Edition |
|
| Back to top |
|
|
morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
|
| Posted: Sun Sep 25, 2016 4:52 pm Post subject: |
|
|
metal part of the fuel lines are 6mm ID for return and 8 for feed if i remember correctly.
I had to patch the metal lines as they cracked and used some E85 and fuel safe reinforced hoose. So anything reinforced and fuel safe you use above 6mm ID i think will fine.
_________________
Supercharger and EFI kits
https://www.the924.com |
|
| Back to top |
|
|
brian19600
Joined: 28 Oct 2013
Posts: 375
Location: NJ/CT
|
| Posted: Sun Sep 25, 2016 8:16 pm Post subject: |
|
|
Perhaps send an email to the place you just referenced. See if it is designed for today's fuels. If you run the part number (N202811) thru google, you will get more information, too.
My personal opinion is that if the barbs are designed for 7mm, at what point does the barb not do anything and the strength to hold the hose on is assumed primarily by the hose clamp? I don't know. But it's retaining 70 psi gasoline, so, being wrong can have negative consequences.
_________________
78 924 |
|
| Back to top |
|
|
agfisher
Joined: 09 May 2007
Posts: 484
Location: West Hartford, CT
|
| Posted: Sun Sep 25, 2016 11:16 pm Post subject: |
|
|
| brian19600 wrote: | Perhaps send an email to the place you just referenced. See if it is designed for today's fuels. If you run the part number (N202811) thru google, you will get more information, too.
My personal opinion is that if the barbs are designed for 7mm, at what point does the barb not do anything and the strength to hold the hose on is assumed primarily by the hose clamp? I don't know. But it's retaining 70 psi gasoline, so, being wrong can have negative consequences. |
That's a good point. I might get a sample of the 8 and see how close it is. I'll also pave a call to see if I can get the modern fuel sage version. Thanks.
_________________
1977 924 N/A Martini Edition |
|
| Back to top |
|
|
Noahs944
Joined: 08 Dec 2015
Posts: 782
Location: Calgary, Alberta, Canada
|
| Posted: Mon Sep 26, 2016 5:36 am Post subject: |
|
|
For the fuel tank to fuel pump hose I used steering pump supply hose, from an American truck dealership known as Peterbilt. It is plentiful & in stock & is sold by the foot for dirt cheap.
Later it occurred to me that VW probably stock the right stuff, but for low pressure supply hose it works for my 78 924 . |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
924 FAQ (Technical)
