Amazingly, I timed the megacycle 250-40 cam I have up this year, and my unrecognised cam outperforms it , I am about 5mph down and at least 0.25 seconds over the quarter, whilst the timing can be what happens on the day, terminal speed is normally a constant unless I really stuff it up.
The 250-40 is retarded by 4 degrees as everyone says is better, the unrecognised cam just gets put in on the timing marks as there is no data to go by.