I've learnt from many nasty faced jumps that going slower into the face of the jump and then getting on the power on the upramp will make your buggy jump further and more precise.
I remember when I couldn't clear a nasty double as everytime I appproached it I thaught I needed max speed to clear as from the drivers stand it was pretty hard to guage. Then I slowed down, accelerated on the upramp and cleared with ease.
Got me stuck for 3 or 4 qualifiers on a new track