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
> Breather Chimney AN Line Recommendations
yeahmag
post Jul 30 2018, 12:40 PM
Post #1


Advanced Member
****

Group: Members
Posts: 2,446
Joined: 18-April 05
From: Pasadena, CA
Member No.: 3,946
Region Association: Southern California
I'm running a welded on -10AN fitting on the chimney to a firewall mounted breather on the autocross car. I've experienced twice now, the chimney clip coming undone while driving the car hard. I'm thinking the SS braided -10AN line is too stiff for the chimney "clip" to overcome any movement in the body and drive train.

Does anyone have any experience with a softer, more flexible AN style hose?

-Aaron
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
jd74914
post Jul 30 2018, 01:18 PM
Post #2


Its alive
****

Group: Members
Posts: 4,840
Joined: 16-February 04
From: CT
Member No.: 1,659
Region Association: North East States
I'd try out some Push-loc hose (+associated fitting). It's rubber, nice and flexible, and inexpensive.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SirAndy
post Jul 30 2018, 02:13 PM
Post #3


Resident German
*************************

Group: Admin
Posts: 42,150
Joined: 21-January 03
From: Oakland, Kalifornia
Member No.: 179
Region Association: Northern California
QUOTE(yeahmag @ Jul 30 2018, 11:40 AM) *
Does anyone have any experience with a softer, more flexible AN style hose?

http://www.914world.com/uploads/4281_b1.pdf

(IMG:style_emoticons/default/shades.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
yeahmag
post Jul 30 2018, 02:23 PM
Post #4


Advanced Member
****

Group: Members
Posts: 2,446
Joined: 18-April 05
From: Pasadena, CA
Member No.: 3,946
Region Association: Southern California
I went all in on a push lock style system once and it failed. Granted this was for an oil cooler, but the hose got soft in the heat and oil was pouring out everywhere.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ChrisFoley
post Jul 30 2018, 02:24 PM
Post #5


I am Tangerine Racing
*****

Group: Members
Posts: 7,978
Joined: 29-January 03
From: Bolton, CT
Member No.: 209
Region Association: None
Fragola hose is the best.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
jd74914
post Jul 30 2018, 03:07 PM
Post #6


Its alive
****

Group: Members
Posts: 4,840
Joined: 16-February 04
From: CT
Member No.: 1,659
Region Association: North East States
(IMG:style_emoticons/default/agree.gif) I've used Fragola stuff for both oil and water systems and been happy with both price and performance. The brand name Parker Push-loc hose has also worked out pretty well.

Alternatively, fiber-braided hoses are also pretty good in my experience. I've never made them, only purchased from BMRS, but they've always held up well and had a bit more flex.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
yeahmag
post Jul 30 2018, 03:10 PM
Post #7


Advanced Member
****

Group: Members
Posts: 2,446
Joined: 18-April 05
From: Pasadena, CA
Member No.: 3,946
Region Association: Southern California
The Fragola Nylon hose is totally affordable and will use standard AN fittings (which I have a million of). I'll likely try that first. I may also move the breather off the firewall and mount to the back of the motor itself via a stand to keep it isolated.

There is a chance this is also happening because the bale itself has weakened over time. I'm going to try and find another one to test. Mine even with the 914rubber.com thicker gasket doesn't take much effort to clip.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
yeahmag
post Jul 30 2018, 08:21 PM
Post #8


Advanced Member
****

Group: Members
Posts: 2,446
Joined: 18-April 05
From: Pasadena, CA
Member No.: 3,946
Region Association: Southern California
I decided to bend the bale in to a better shape and ghetto up a softer, more flexible hose. 1/2” ID heater hose fits the -10AN fittings surprisingly well.

Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mike Bellis
post Jul 31 2018, 07:30 PM
Post #9


Resident Electrician
*****

Group: Members
Posts: 8,347
Joined: 22-June 09
From: Midlothian TX
Member No.: 10,496
Region Association: None
QUOTE(Racer Chris @ Jul 30 2018, 01:24 PM) *

Fragola hose is the best.

Wrong... Hose is crap. Fittings are crap.

They are not true AN (Army/Navy) mil spec sizes. They are not interchangeable with other correct AN hose. They are smaller ID/OD than the same AN sizes from Aeorquip, Earls, Jeggs, Summit, etc. Use them if you want but make sure that's all you use because nothing else will fit on their proprietary hose size or fittings.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
r_towle
post Jul 31 2018, 08:41 PM
Post #10


Custom Member
***************

Group: Members
Posts: 24,705
Joined: 9-January 03
From: Taxachusetts
Member No.: 124
Region Association: North East States
Aaron, that just looks like it will wiggle lose with so little flex.
I would keep a close eye on it, and maybe consider a slightly longer piece of hose to add in some movement?

Seems from what I can see, the oil breather is mounted on a stationary part of the car, and the engine is moving?
that type of movement will loosen up something over time.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
yeahmag
post Jul 31 2018, 08:47 PM
Post #11


Advanced Member
****

Group: Members
Posts: 2,446
Joined: 18-April 05
From: Pasadena, CA
Member No.: 3,946
Region Association: Southern California
I agree. The proof of concept is there though. That heater hose is super soft! If it survives the next event I’ll move to a nylon braided (style) hose and mount a standard, non-return breather/catch can to the stand off you can see in the picture.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
r_towle
post Jul 31 2018, 08:56 PM
Post #12


Custom Member
***************

Group: Members
Posts: 24,705
Joined: 9-January 03
From: Taxachusetts
Member No.: 124
Region Association: North East States
it will get really soft and squishy when you are at the event...
Dont touch it or you may walk home...lol

I ended up putting the oil breather box on a bolt on the motor.
then, everything moved together.
I struggled with the head breathers and main breather until I moved the box...then all the wiggling stopped and things worked perfectly.

And yah, that tubing...it won't last if its what I think it is.
I tried that too (IMG:style_emoticons/default/smile.gif)
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: 13th March 2025 - 04:05 AM
Invision Power Board v9.1.4 © 2025  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 ...