Sodium Filled Exhaust Valves
Sodium Filled Exhaust Valves
Thread Starter
Registered User
Joined: Jul 2001
Posts: 162
From: CA, USA
GM farms out a lot of work on short run vehicles. For example, the LT5 was almost completely made by sub contrators and assembled by GM. GM doesnt put Sodium Filled Exhaust Valves in any other engine. so it would make fiscal sense that they bought them from a company who already makes them, instead of buying all the tooling to just put them in an off shoot version of an engine that only went in a few cars for one year.
You can buy them from GM but they only come in 1.55 and i would really like a set in 1.60. But all i am doing is seeing if that is even possible. So far i cant find out who makes them. Subaru, Volkswagen, and Nissan have all used them in other cars and they too probably bought them some where i just need to find out where. Thanks.
You can buy them from GM but they only come in 1.55 and i would really like a set in 1.60. But all i am doing is seeing if that is even possible. So far i cant find out who makes them. Subaru, Volkswagen, and Nissan have all used them in other cars and they too probably bought them some where i just need to find out where. Thanks.
Registered User
Joined: Nov 2001
Posts: 2,985
From: In a house by the bay
Originally posted by Killerjello
trey works there i believe
its gonna be scary with parts he works on
trey works there i believe
its gonna be scary with parts he works on
Evl one,
Check with SBI too:
http://www.sbintl.com/
Good luck.
-Mindgame
Registered User
Joined: Aug 2002
Posts: 662
From: dallas, tx, usa
Originally posted by lt4 fd
Whats teh advantage of sodium filled exhaust valves, weight or heat related properties????
Whats teh advantage of sodium filled exhaust valves, weight or heat related properties????
Banned
Joined: Aug 2001
Posts: 3,505
From: looking for a flow bench so Brook and I can race
they let me in the SRt-10 yesterday MG 
I am in braking systems, not "components"
i can get viper calipers, rotors and hubs-
but i cant get a standard SBC exhuast valve
hopefuly i can pull some strings and get some new rotors for my truck-
deep puddles + sand + hot rotors =
trey > mindgame > eye crusties
hooooooooooo!
I am in braking systems, not "components"
i can get viper calipers, rotors and hubs-
but i cant get a standard SBC exhuast valve
hopefuly i can pull some strings and get some new rotors for my truck-
deep puddles + sand + hot rotors =
trey > mindgame > eye crusties
hooooooooooo!
Last edited by treyZ28; Jun 6, 2003 at 08:46 AM.
Thread Starter
Registered User
Joined: Jul 2001
Posts: 162
From: CA, USA
Quicksilver is right. 100%.
The exhaust valve get really hot, and when the cylinder is trying to fill cold air hits the exhaust valve and warms up (also cools the exaust valve down), so the SFEV have MANY advantages in our applications. I have even heard on the grape vine that all Z06 has SFEV's. But that might be a fable. At any rate, SFEV run cooler because the disburse heat from the head of the valve and into the stem. Turbo'ed cars use SFEV all the time to try and keep exhaust temps down. And on NA motors is helps valve train longevity at high RPMs where heat build rapidly. So it would have more benefit for the Auto-X or Road course, than Drag racing. They are rare and expensive, if you have a supercharger, turbocharger or even nitrous it can be beneficial. And from what I am finding out, very hard to find.
The exhaust valve get really hot, and when the cylinder is trying to fill cold air hits the exhaust valve and warms up (also cools the exaust valve down), so the SFEV have MANY advantages in our applications. I have even heard on the grape vine that all Z06 has SFEV's. But that might be a fable. At any rate, SFEV run cooler because the disburse heat from the head of the valve and into the stem. Turbo'ed cars use SFEV all the time to try and keep exhaust temps down. And on NA motors is helps valve train longevity at high RPMs where heat build rapidly. So it would have more benefit for the Auto-X or Road course, than Drag racing. They are rare and expensive, if you have a supercharger, turbocharger or even nitrous it can be beneficial. And from what I am finding out, very hard to find.
