408 hyd roller, too much spring pressure?

Bewy said

^^^^ Read post #64. BHs do not require lighter valves more than other type of spring. Of course, one would use the lightest valves & valvetrain possible in the interest of VT stability & VT life; only a fool would use parts heavier than necessary.

Production vehicles have multi year warranties. The fact that OEMs use BHs while warrantee-ing their engines for 3-5 yrs speaks volumes about BH reliability.

Isky said it best in Tech Tip: Is extra exh duration necessary? Habit, he said.
I think it is the same here. Folks get into a habit, & will not accept new technology. Some are probably using crank handles to start their engines...

Click to expand...

That’s the thing Bewy. They aren’t “new technology”.

I also never said one spring required lighter components. My point was you can save far more weight with a lighter valve than you can with a spring and retainer.

It wasn’t that long ago when Ti locks were all the rage. Of course, I looked into them far more than I should have.

In the end, the weight savings for a Ti lock was so minuscule that unless I was using a Ti valve with a 7 mm stem the locks didn’t matter.

It’s the same with a BH spring. There is much more low hanging fruit to grab that will give a much better return on investment.

And, back to the original issue…using a BH spring when the geometry is wrong isn’t fixing anything.