Go Back   Corvette Forum > C5 Corvettes, 1997 - 2004 > C5 Tech
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C5 Tech
Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace Sponsored by
Karl Chevrolet

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 12-01-2010, 05:58 PM   #1
luc719
CF Member
 
luc719's Avatar
 
Member Since: Apr 2010
Location: Garden City Michigan
Default sodium filled valves???

I just bought a set of 243 heads and found out after they do not have the sodium filled valves. What is the difference between normal and sodium filled? and should i go buy them before i put the heads on?

NOTE: this car is my weekend car, not a track car
luc719 is offline   Reply With Quote
Old 12-01-2010, 06:07 PM   #2
dougbfresh
CF Senior Member
 
Member Since: Nov 2005
Default

Sodium filled valves are very light-the center is hollowed out for running high rev's. Not really needed for normal/casual driving.
dougbfresh is offline   Reply With Quote
Old 12-01-2010, 06:23 PM   #3
Toxiclemonade
CF Senior Member
 
Member Since: Sep 2009
Location: Charleston SC
Default

are 243 heads not the stock heads that come on a standard c5?
Toxiclemonade is offline   Reply With Quote
Old 12-01-2010, 06:32 PM   #4
manley845
CF Senior Member
 
manley845's Avatar
 
Member Since: Mar 2010
Location: Panama City Beach FL
Default

Quote:
Originally Posted by Toxiclemonade View Post
are 243 heads not the stock heads that come on a standard c5?
241 heads were on base models. The Z06 received 243 heads.

The LS2 uses 243 heads with non-hollowed valves. Gotta be careful what the heads came off of, if you want the hollow valves.

The Hollow valves are about 90gr I think and the others are a bit over 100gr. Going off memoy here

You don't need the Z06 valves unless you really plan on 7k rpm speeds.

But, if you can find them cheap and install them, you might as well.
manley845 is offline   Reply With Quote
Old 12-01-2010, 06:34 PM   #5
Toxiclemonade
CF Senior Member
 
Member Since: Sep 2009
Location: Charleston SC
Default

Quote:
Originally Posted by manley845 View Post
241 heads were on base models. The Z06 received 243 heads.

The LS2 uses 243 heads with non-hollowed valves. Gotta be careful what the heads came off of, if you want the hollow valves.

The Hollow valves are about 90gr I think and the others are a bit over 100gr. Going off memoy here

You don't need the Z06 valves unless you really plan on 7k rpm speeds.

But, if you can find them cheap and install them, you might as well.
Perfect, thank you.
Toxiclemonade is offline   Reply With Quote
Old 12-01-2010, 06:40 PM   #6
manley845
CF Senior Member
 
manley845's Avatar
 
Member Since: Mar 2010
Location: Panama City Beach FL
Default

Quote:
Originally Posted by Toxiclemonade View Post
Perfect, thank you.
Welcome
manley845 is offline   Reply With Quote
Old 12-01-2010, 06:57 PM   #7
C5XTASY
CF Senior Member
 
C5XTASY's Avatar
 
Member Since: Oct 2000
Location: Monticello MN
Default

I believe the 2002-2004 Z06 heads came with the sodium filled valves. The 2001 Z06 and all standard C5s did not.
Ed
C5XTASY is offline   Reply With Quote
Old 12-01-2010, 07:23 PM   #8
LoneStarFRC
CF Senior Member
St. Jude Donor '08-'09-'10-'11-'12-'13-'14
 
LoneStarFRC's Avatar
 
Member Since: May 2001
Location: "If you like your Constitution, you can keep your Constitution! Period!" And remember, the border is secure!
Default

Sodium-filled hollow-stem valves are about more than just weight reduction. In operation, the sodium liquifies, conducting heat away from the valve itself and into the cylinder head. The technology has been around for a very long time, mainly on truck engines in years past.

HTH
LoneStarFRC is offline   Reply With Quote
Old 12-01-2010, 07:56 PM   #9
zeevette
CF Senior Member
 
zeevette's Avatar
 
Member Since: Sep 2005
Location: Pasco WA
Default

Quote:
Originally Posted by LoneStarFRC View Post
Sodium-filled hollow-stem valves are about more than just weight reduction. In operation, the sodium liquifies, conducting heat away from the valve itself and into the cylinder head. The technology has been around for a very long time, mainly on truck engines in years past.

HTH
I remember the 1970 Buick GS455 Stage1 had them, so they've been around a while.
__________________
'02 black/black. LGM headers/cats/X. iForge "Aero" 18/19 combo. Koni FSDs. Trickflow/TEA heads,and HS rockers, MGW shifter.A&A Vortech V3si trim, and A&A COMP blower cam.RPS Twin Carbon Street. Tick master. Diff by RKT56. ECS brace. Pfadt diff brace. Somebody stop me...

I should be careful what I ask for....
zeevette is offline   Reply With Quote
Old 12-01-2010, 07:56 PM
 
Go Back   Corvette Forum > C5 Corvettes, 1997 - 2004 > C5 Tech
Reload this Page sodium filled valves???
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: 243 Z06 LS6 heads w/ sodium filled valves and aftermarket springs Milan C5 Parts for Sale/Wanted 14 04-01-2013 10:28 PM
Sodium filled valves Mr. Gizmo C6 Z06 Discussion 6 12-15-2012 04:11 PM
exhaust valves ??? *C7* C7 General Discussion 8 11-04-2012 03:38 PM
sodium valves, how do i know? bracketshark C5 Tech 23 10-13-2012 01:05 AM
sodium filled exh. valves Twin_Turbo C3 Tech/Performance 12 04-02-2005 01:48 PM


Tags
2001, 2004, 241, 243, buy, corvette, did, difference, filled, heads, sodium, soudim, valves, year, z06


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -4. The time now is 01:35 AM.


Emails & Password Backup