Just a few thoughts on the current HUP layout.
The pack indicator (top left) is good – provides clear indication of your placement in relation to other racers - Elegant solution really. How about incorporating lap number and race position number into the top band?
Could the damage % be removed? I think that the flames, electricity ect on the vehicle and flashing HUD adequately communicate level of damage to the player.
Could the jump charge indicator be re-worked? Potentially, instead of the large bar to the top of the screen how about further customising the speedometer? ...a little blue dot/circle??
Please also consider lessening the glitch effect on the HUD at lower levels of damage.