d3p0
Not true, I frequently get more angle than I can use, which is to say I can't see where I'm going at that point. Setup becomes very important at that point.
same on this end
this is the reason i use the chase view when drifting. I've tried switching to other views, but I'm so comfortable with chase that the transition just hasnt happened for me.
anyways, on this thread:
of the posts so far, I agree most with henessy's reply. Stick to one car on one track, take 20 or 30 quick laps for setup (that should be more than enough) changing only one setting at a time, and past that point do what you can to leave it alone. Get familiar with the car and gradually build up your angle.
the car doesnt matter much as long as it is comfortable and appropriate for your technique.
anyways, about the rest of your question
no, you cant really drift at 90 degrees - the reason: you cant turn your front tires 90 degrees in one direction. makes sense right?
if you are travelling completely sideways, then you are just sliding wildly
(you can only approach corners with an angle of 90 or less in this fashion - it makes perfect logical sense if you take a second to consider it)
you can control this and gradually merge it into a drift, but you cannot drift fully around a haripin corner with 90 degree angle
more often than not, if you approach a long duration corner with large angle you will lose momentum half way through (or run over the inside curbing) since you are not generating enough acceleration in the direction of the corner exit to complete it cleanly.
ok, all that said - more power or a higher entry speed will naturally lend themselves to greater angles, but the same sorta rules still apply. The kinetic friction and drag of a car sliding fully sideways is many times greater than the rolling resistance and drag of a car rolling forwards, and it has less force propelling it in its desired direction. If you halt mid corner its clear indication that you were too sideways.
and lastly, a link to a similar thread, as requested:
exiting the drift?
it contains much of the same info as this thread has accumulated, but...ya
edit: i wrote this with mr and fr's in mind. the physics of an awd drift are a bit more elaborate and they can do some fancier stuff with the right setup and a competent pair of hands