Factual error: When Barnabus is talking to Carolyn (just before he goes out in the woods and kills the hippies) he says "I am a picker. I am a grinner. I am a lover. And I am a sinner. I play my music in the sun." These are lines from the song "The Joker" which was recorded in August of 1973 and released in October 1973. The song wasn't released for a full year after the events in the movie, which takes place in October, 1972. (00:56:50 - 00:57:12)
Factual error: Alice Cooper sings the song "No more Mr Nice guy." This song wasn't released at that time.
Continuity mistake: When Angie kisses Barnabas in the drawing room, there is a small lipstick smudge above his upper lip. In the next shot, the smudge is much larger and it is under his lower lip.
Answer: It's unknown how long it took for her to become a vampire. She was tossed into the bay and sunk to the bottom, lying there unconscious for a period of time. She may have turned early on, but did not awaken until much later.
raywest ★
She had teeth when she was being bit by Barnabus. She had turned before he confronted her. He just drained her to a weakened state and she woke back up in the bay.