There are some stats that weapons clearly have but aren't listed.
I'd like to get some information on the ranges of the different variants of turrets both large and small, particularly blasters.
Do advanced stabilized blasters have a longer optimal than regular stabilized? etcetera.

For missile launchers, do the high velocity "unerring accuracy" ones have less spread when fired while moving?
=> Didnt actually get what you mean

Do advanced Laser rifles have an increased optimal range over the basic one?
=> I think yeah. not by much but with skills you still feel it. Check the training ground, there's a stickied thread that has all ranges.

In the description the vehicle powerplants say they increase speed and torque, do they in fact increase top speed or only your acceleration?
=> I'll let vehicle specialist answer

Why do blasters get a max range efficiency against a turret installation of 40%?
Same for why do small blasters have a max efficiency against other vehicles of 40%?
=> Were you far from your target ? Blasters have a short range compared to other turrets. And if you fall below optimal, efficiency drops.

Are certain areas of vehicles more vulnerable, the way headshots deal more damage?
=> The back is supposed to be more vulnerable but never checked for an actual multiplier

Finally do you have to look at a vehicle with your main turret in order to lock it for the purpose of remote reps?
If so is there a way to/possibility for a way to auto lock a previously locked target as soon as it comes in range. This would allow you to lock an HAV with your tank and start repping it then break range and do your own thing or sweep a corner and then immediately begin locking them again when they re-enter range without the need of wasting turret time looking at them and back.
=> Dunno

Thanks to anyone who replies and hopefully we can get info on a lot of these significant but not visible stats.