sodium filled exh. valves
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Originally Posted by Twin_Turbo
Anyone have a good source for sodium filled exh. valves? I can't seem to find anyone else but ferrea ... I also don't want to break the bank if I can avoid that 
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
I can get you an unreal price on Titanium valves. Rogers has a set for a small block but the intakes are 2.250 but they can be cut down. They were only used on a dyno engine for one testing. They are in great condition. I can get them for $100 CDN
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Race Director
Joined: Nov 2000
Posts: 16,416
Likes: 1
From: NC,USA
Fast burn heads...
http://www.superchevy-web.com/tech/0310sc_mouse/
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"The hollow-stem intake valves and sodium-filled exhaust valves are incorporated to reduce mass which allows for better valve control at higher rpm. We ordered our heads as a complete set with GMPP LT4/ZZ4 springs (101 pounds at 1.78 inches, 332 pounds at 1.22 inches) with lightweight LT4/ZZ4 retainers, and 3/8-inch screw-in studs."
http://www.superchevy-web.com/tech/0310sc_mouse/
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"The hollow-stem intake valves and sodium-filled exhaust valves are incorporated to reduce mass which allows for better valve control at higher rpm. We ordered our heads as a complete set with GMPP LT4/ZZ4 springs (101 pounds at 1.78 inches, 332 pounds at 1.22 inches) with lightweight LT4/ZZ4 retainers, and 3/8-inch screw-in studs."
Race Director
Joined: Nov 2000
Posts: 16,416
Likes: 1
From: NC,USA
LT4... With part numbers
http://www.grandsportregistry.com/lt1vslt4.htm
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1.55" (39.4mm) Sodium filled stem Weight:75 grams, 2.65 ounces - Part number 12551313
http://www.grandsportregistry.com/lt1vslt4.htm
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1.55" (39.4mm) Sodium filled stem Weight:75 grams, 2.65 ounces - Part number 12551313
Race Director
Joined: Nov 2000
Posts: 16,416
Likes: 1
From: NC,USA
Heres the pricing for the LT4 valve...
$33.56 vs list GM price of 58.86
http://www.gmpartsdirect.com
Part number is 12551313
$33.56 vs list GM price of 58.86
http://www.gmpartsdirect.com
Part number is 12551313
Burning Brakes
Joined: May 2004
Posts: 1,100
Likes: 3
From: belle plaine ks
sodium filled danger
I realize they have made progress on metals in valves, but keep this in mind from a kid who grew up on a farm. My dad had an international harvester ton pickup truck [about mid fifties] that originally ran on propane. They put sodium filled valves in the motor to keep the valves cool when using propane. The truck was sold to my Dad after the propane was removed. He got along just fine with the truck until you got it stuck in the mud. He would wind the straight six up trying to get it out of the mud hole and drop a valve. The first time it did this the mechanic suggested removing all the sodium filled exhaust valves so it wouldn't happen again as he said a combination of the hollow stem and probably guide wear made the valve "dance" on the seat until it snapped the head off and dropped it at high rpm. It sounded plausible to me. However Dad being the "thrifty" guy he was said he didn't think that would happen again. We were back three times before it convinced him to get rid of the sodium filled exhaust valves. You may not have this trouble with new valves and guides, but how about later on down the road?
