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 )

> OE Exhaust Valves, Sodium
914werke
post Apr 1 2006, 10:04 PM
Post #61


"I got blisters on me fingers"
**********

Group: Members
Posts: 10,066
Joined: 22-March 03
From: USofA
Member No.: 453
Region Association: Pacific Northwest
I know Jake suggests tossing these, but unfortunantly Im rebuilding a set of heads. Id like to keep them stock, but Im more concerned about longevity.
Is there anything that can be done to improve thier function?

Cryo? (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif)
User is online!Profile CardPM
Go to the top of the page
+Quote Post

Posts in this topic
rdauenhauer   OE Exhaust Valves   Apr 1 2006, 10:04 PM
r_towle   Im gonna ask a rhetorical question... Did the ori...   Apr 1 2006, 10:10 PM
rdauenhauer   Actually yes! and that IS the hope. <...   Apr 1 2006, 11:56 PM
Brando   <...   Apr 2 2006, 12:16 AM
messix   the valve stems are filled with sodium to isolate ...   Apr 2 2006, 12:20 AM
DNHunt     Apr 2 2006, 06:49 AM
davep   <...   Apr 2 2006, 06:59 AM
Bleyseng   I don't use 30yr old valves in my cars....if y...   Apr 2 2006, 08:29 AM
J P Stein     Apr 2 2006, 08:48 AM
r_towle   Here is my logic. The car/engine was designed for...   Apr 2 2006, 09:10 AM
Rotten Robby   ...and for a fun experiment you can do at home...   Apr 2 2006, 10:54 AM
r_towle   what happens when you pour it down the sink?? smok...   Apr 2 2006, 10:57 AM
bd1308     Apr 2 2006, 11:10 AM
J P Stein     Apr 2 2006, 11:10 AM
Rotten Robby     Apr 2 2006, 11:13 AM
Jake Raby   I can't stand not posting on this topic. If ...   Apr 2 2006, 11:59 AM
Aaron Cox   http://www.914world.com/bbs2/h...   Apr 2 2006, 12:05 PM
r_towle   ...   Apr 2 2006, 01:27 PM
Bleyseng   http://www.914world.com/bbs2/h...   Apr 2 2006, 04:17 PM
jsteele22   Interesting thread, had no idea it was gonna be so...   Apr 2 2006, 05:13 PM
bd1308   sounds like sodium could be used to make hydrogen ...   Apr 2 2006, 05:20 PM
alpha434   I'm not sure if you could cryo sodium filled v...   Apr 2 2006, 06:00 PM
davep   ...   Apr 2 2006, 06:01 PM
Al Meredith   Sodium is used in LOW PRESSURE SODIUM LIGHT BULBS....   Apr 2 2006, 06:57 PM
alpha434     Apr 3 2006, 08:58 AM
DNHunt  
  Apr 3 2006, 09:11 AM
Bleyseng   My rebuilt rebuilt motor with the new cam is runni...   Apr 3 2006, 10:19 AM
Demick   Just a few observations: 1. I have noticed that J...   Apr 3 2006, 10:30 AM
DNHunt   I agree that the longer duration probably acounts ...   Apr 3 2006, 10:52 AM
Demick   Dave Very generally, steel has 2-3 times the ther...   Apr 3 2006, 11:07 AM
Bleyseng     Apr 3 2006, 11:10 AM
J P Stein   The sodium transfers heat from the head to the ste...   Apr 3 2006, 12:43 PM
Bleyseng   and if the valve guide is worn the valve does not ...   Apr 3 2006, 12:57 PM
alpha434   <...   Apr 3 2006, 01:39 PM
SLITS   <...   Apr 3 2006, 02:01 PM
davep   <...   Apr 3 2006, 02:06 PM
Matt Meyer  
  Apr 3 2006, 02:22 PM
Bleyseng   Good food for thought on how fixing one problem le...   Apr 3 2006, 02:46 PM
Twystd1   Somebody explain to me how an Airplane piston engi...   Apr 3 2006, 02:58 PM
arc914  
  Apr 3 2006, 04:06 PM
Bleyseng   I am not sure that type 4 engines need a spray bar...   Apr 3 2006, 05:29 PM
Twystd1   Many spec racing (NASCAR and others) V8 engines us...   Apr 3 2006, 06:03 PM
J P Stein   Golly.........what Porsche engine has had 2 cam to...   Apr 3 2006, 07:33 PM
Bleyseng   Aren't 911 engines dry sumped? <...   Apr 3 2006, 08:07 PM
TimT  
  Apr 3 2006, 08:22 PM
DNHunt   Damn that was good http://w...   Apr 3 2006, 08:34 PM
J P Stein   30's technology? I'm 40's technology.....   Apr 3 2006, 09:38 PM
sixnotfour   935 oil cooled/lubed guide exhaust,oil cooled/lube...   Apr 3 2006, 11:03 PM
sixnotfour   sideshot   Apr 3 2006, 11:07 PM
Mueller  
 

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: 17th May 2024 - 03:05 PM
Invision Power Board v9.1.4 © 2024  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 ...