Head diameter, stem diameter, valve length, ramp speed and RPM are just a few of the factors in deciding on valve material. I'm not going to say I am smarter than David Reher (I'm not) but he and I agree that Ti is the only consideration for most ANY engine of today's geometry. It's just not worth messing with steel. Today, bracket engines are using lobes that are faster then Pro Stock of only 10 years ago. You can order lobes today that are so close to PS that it is unthinkable. Yet, guys continue to try and cut corners on valves.

I wouldn't consider steel.

BTW, it's one of the few things I wholeheartedly agree with DR. Not that he cares.................

Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston