what head speed for os .91 sx on vibe

[gundampg00]

Can someone please tell me the head speed on the vibe with os .91 sx thank you.

[crash n' burn99]

I dont know about the sx, but the sz works well in the vibe 90 anywhere between 1800-1950, It seems like the 90 size engines are less finiky about the rpm they run at, the seem to make power at a wider range of rpm's