Best components for building head?

[EthanolTurbo]

So unfortunately I had a little valve bending experience, and was thinking instead of putting in OEM hardware I could spend a bit more and get some hardware that'll let me rev to 8500+ safely and consistently.

Was looking at Ferrea components but open to suggestions. Just want something better than OEM if I'm replacing the valves/springs etc anyways.

[Feffman]

ET:

The stock BMW valves are pretty well engineered and are actually a little lighter (EX:45.2g INT:47.5g) than similar triple-lock replacements from Supertech (EX:47.7 INT:48.5) or Ferrea (EX:48.4 INT:48.4). I'm in the process of having a head done. IF I stay with triple-lock valves, I'll retain the stock valves for the race engine that will be revving to 8,400-8,500 RPM. If you really want to spend some coin, look into the stock BMW CSL exhaust valve (43.1g) but sit down before you price them and be patient for them to arrive.

Most race engines use a single-groove lock/stem with either shims or lash-caps both of which Supertech and Ferrea offer. Looser triple-groove locks allow the valve to rotate in the locks where single-groove locks clamp the stem for less movement. Another issue I can't verify is using titanium single-groove locks. "Noise" on the internet stating un-coated titanium locks may be grinding the stem to the point of stem failure. If this is truly an issue it appears the machined titanium locks (most if not all triple-groove locks are cast) should be coated, assuming a diamond-like coating, for prevention.

Again, there's "noise" on the internet about some high RPM S54 "spitting" shims but it seems primarily with forced induction engines. I can't verify this, but it appears to have something to do with the turbo/supercharging forcing the valve to remain fractionally open when they should be closed.

Supertech, Ferrea and the BMW, as well as others (PSI Springs), have very good spring offerings. The twin-springs seem to rev and hold up very well. I'm running Supertech springs on the current head (Schrick 280/288 cams and stock valves/seats/locks) revving to 8,250RPM with no issues after 100+ hours of high RPM track time.

Feff

[Sharocks]

I have the Supertech valvetrain along with their springs with Schrick 288/280's. My car had a redline of 8500 for 6 years. I only recently brought it back down to 8250.

[bmw m3 s50]

I have the Supertech valvetrain along with their springs with Schrick 288/280's. My car had a redline of 8500 for 6 years. I only recently brought it back down to 8250.

Could you share so more info about your build? Who did the head work?

[M3dragon]

If you are pulling heads, send them to Lang Racing for port and re-shape. I did those and CSL valves and cams