yeah I used that book last year. as I remember there is a equation for Q. I can't remember off hand but will look later

side note, IIRC Beers was a professor here at UCONN, and he lives near by

- 95 Mystique LS - Zetec/5spd - 99 Contour SeVT Sport - Duratec/5spd Official NE-CEG Contour/Mustang Family