"This OE sodium-filled valve will not allow you to increase more horsepower without having failures in your engine."
They get saltyWhy? Lol
The technology itself is very old too. The Merlin engine in the Spitfire had them. It's sorta amusing to see it used as a selling point on modern engines.Yep, basically they're awesome when engineered properly because they are lightweight and they dissipate heat. I have no idea why Ferrea is making such bold claims with such a broad stroke as there are many engines that require no upgrade when modified. Sure, at some point they may become an issue when things start getting real crazy, but I've had them on many turbocharged cars with no issues.
Maybe other engines im less familiar with are more prone to failure, but generally speaking it's a great design.
The hyundai/kia 3.3t gdi engine, which won best engine of the year award also has sodium filled valves, and i haven't seen owners complain about it's reliability or durability.Sodium filled valves are fine. Corvettes use them in race engines. See below. No worries.
Jason at Katech has come out and said repeatedly their is nothing wrong with the oem sodium filled valves and that is what they use on ALL OF THEIR ENGINE BUILDS!!
That's all I need to hear from the Shop that builds countless LS7 High Performance Engines and Racing Engines for GM Racing, and also runs them in their own personal Zs (the oem sodium filled valves). Also, their have been no issues with the sodium filled valves in the battle tested LS6 engine.
That's not good enough for you?
Remember the old expression, if it's NOT BROKE, don't fix it, if you must pull your heads off and get them more bullet proof in your mind put on some bronze valve guides, new oem valve springs, and call it a day and enjoy your car.