Sodium Valves? |
|
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. |
|
Sodium Valves? |
stugray |
Nov 18 2012, 12:45 PM
Post
#1
|
Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
I was once told by one of the resident "experts" on this forum (who has not been around lately) that I should replace my sodium filled valves with stainless. However after visiting the local RSR racing mechaninc (who is machining my case and inspecting my heads), HE said that he goes out of his way to FIND sodium filled valves for race engines. He said that on Air-cooled engines, the sodium helps pull the heat from the heads.
Any comments or suggestions regarding sodium vs. stainless? I also heard that a simple change from two-angle to three-angle valve seats can increase flow by more than 20% with no other changes to the heads. Good news is that I should be re-assembling the engine without the deck height problems over thanksgiving weekend. Hope to have it running by Xmas. (IMG:style_emoticons/default/piratenanner.gif) Stu |
914werke |
Nov 18 2012, 05:12 PM
Post
#2
|
"I got blisters on me fingers" Group: Members Posts: 10,159 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest |
I call (IMG:style_emoticons/default/stromberg.gif) on that thinking.
Rob sounds like your drinking the Raby Kool aid. If you tortured over heated & neglected your motor, sure after a few DECADES your chances of a seat or stem failure are bound to increase. But if you provide appropriate maintenance, Oil, valve adjustments cooling and dont spin that motor beyond its realistic operating range (continuously (IMG:style_emoticons/default/biggrin.gif) ) I believe you are better off with a technology that was designed for the engine than one that was not (Im pretty sure SS was around in the early 70's?). As for new valves being hard to come by, IDK I havent had to source any recently. But they will ALWAYS be more expensive than SS. False economy. (IMG:style_emoticons/default/stirthepot.gif) |
Lo-Fi Version | Time is now: 17th June 2024 - 12:41 PM |
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 ... |