Crankcase Breathers |
|
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. |
|
Crankcase Breathers |
McMark |
Sep 12 2017, 04:58 PM
Post
#1
|
914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
I was looking at the factory manuals and talking with someone about crankcase breathers. We were talking about breather setups for carbs specifically. And I realized as I was looking at the breather diagram that it appears that the breather ports on the heads were included to supply extra air to flow through the engine case. And then I read this little snipped in the manuals which seems to support my thought:
QUOTE Crankcase ventilation has been considerably improved in the engine by ducting fresh air from the air filter. This modification reduces crankcase condensation and icing at low outside temperatures. So following that logic... If the crankcase breather (at the oil filler neck) isn't connected to a vacuum source, then the ports at the heads should/could be plugged instead of connected to a breather box. Thoughts? Contradictions? Agreement? I realize people have been connecting breathers all sorts of different ways and most work just fine. I'm more interested in the theory aspect, and refining an 'ideal' installation since we already know many ways to 'make it work'. Attached image(s) |
Mark Henry |
Dec 30 2017, 08:15 PM
Post
#2
|
that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
BTW I see you have 914 2.0 heads and you have the stock phenolic spacers. The aftermarket manifolds are thicker than the factory FI intake runners and is why your studs are too short. You're only hanging onto the manifolds by a couple of threads, I would recommend replacing the stock studs with 5-10mm longer studs.
|
MikeM |
Dec 31 2017, 10:33 AM
Post
#3
|
Senior Member Group: Members Posts: 564 Joined: 16-May 10 From: Calgary, Canada Member No.: 11,733 Region Association: Canada |
BTW I see you have 914 2.0 heads and you have the stock phenolic spacers. The aftermarket manifolds are thicker than the factory FI intake runners and is why your studs are too short. You're only hanging onto the manifolds by a couple of threads, I would recommend replacing the stock studs with 5-10mm longer studs. Mark...I have pretty much the same situation. Is there anything special about those studs? Where can I find the longer version? Thanks |
Lo-Fi Version | Time is now: 2nd June 2024 - 01:46 AM |
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 ... |