At what point would you step up to ferrea hollow stem valves
I probably don't need to but just wanted to know what would make you choose lighter weight parts on a big block stroker.
My build is 471 with tf 240s & it's getting near the finish line.
Looking to make this engine last as long as a drag car can, I weighed an intake valve at 143 grams that's pretty heavy but I should only turn 7k at the stripe.
Any thoughts or experience ?