I will say Tobias/Toby is meticulous with his work and has the equipment to do so beyond what I have seen at some celebrated shops I have been to. We all know how B-rad talks about some celebrated shops. I’ve been in a couple and understood it first hand walking out. No pictures and no more words from me on that. Like a secret fishing hole.

 

Those 30 gram differences are excellent for high rpm engines, and the valvetrain. The cost is significant, I wonder when the rpm level or the valve size makes it the most desirable. I wonder if it could be really helpful for a 7000rpm Cleveland, with 2.19" or 2.08"ish valves(TFS heads)?

Stop giving me ideas.

 

O


On my engine the *** valves make the springs last longer over the steel valves , and revs higher. But if you are not class racing I wouldn’t go that route

 

some or a lot of Ti valves have a more "tulip" shape on the back (port) side-which helps air flow in a lot of cases. That helps power on it's own.

With Ti valves you can run slightly less spring pressure, which reduces parasitic drag a little bit.

Most that have changed from SS to Ti have shown gains. I did it on an old 5.0, of all things. Old sprint car parts from way back when, free, or I wouldn't have done it. Drove it on the street for a long time. Probably 80,000 miles or so. Never gave me any problems but it was certainly well-used by time I got rid of it.

 

That was going to be something I wanted to ask is average lifespan of ti valves on the street.

 

Ti intakes are worth the expense if you plan on high RPM.

Ti exhausts are a waste of money until 9000+

 

Ti intakes are worth the expense if you plan on high RPM.

Ti exhausts are a waste of money until 9000+

I have noticed that over the years. The exhaust valves generally don’t weigh enough to justify the extra expense of titanium.

The valves came with the cylinder heads so at this point they are free. The question is if they are usable. I trust Toby’s evaluation.

 

In keeping with the spirit of the thread and the internet in general......didn't sodium valves used to explode?

 

Anything can fail, especially in the hands of an idiot.

Hollow stem valves have been used for decades with no issues. I've used plenty of them in the heads that rules requirements dictated dimensions and materials. Sodium filled exhaust valves are not new and were successful in older prop style airplanes and then the technology filtered down to the automotive field.

What causes most valve failures is piss poor camshaft design and out of control valvetrain. Very few people will admit they fked up so they blame the result, not the cause...

No matter, the internet is full of "experts" who haven't accomplished anything in the real world, other than do moronic BoobTube videos and procure (steal) parts from manufacturers they con...

 

Motorcycles also use ti valves on certain models. They do last. BUT, in that application the valve is much, MUCH more stable by design. Also the valves have a coating on them, once the coating wears off be it from dirt or whatever, they'd done-and generally sink into the head, and your clearance goes away, and then the engine either won't run or runs like poo.