I used to have a TT01 with the adjustable arm set, you can easily reach -5° camber front and rear. Since the parts are 2 pieces held together with a turn buckle you can always shave off material and tighten them more.
How are you going to go about measuring this? As stated above camber has a minimal effect on the efficiency of a car in a straight line. It is used to gain better traction in corners. When running large amounts of negative camber in a straight line it just wears the inside of the tire. I feel that with the slow speed of the TT01, and the very minimal affects of camber in a straight line, it will be very hard for you to gain any data on the efficiency of the car.
On this scale of car I would look at changing your hypothesis to do with toe of the wheels (angles in or out looking from the top). I feel this would be easier to measure, and would have an effect on speed and efficiency when driving in a straight line. Large amounts of toe definitely influence the car. For the TT01 you can buy an adjustable steering kit, which would allow you to change the toe of the front wheels to many different degrees. The rear wheels may be harder to toe in without multiple parts, and you may not be able to get high values of toe. But just front toe would have a large affect on the car, I would look into that.
If you have more questions pertaining to the car, there is a forum for the TT01 where you can ask many "experts" on the car, as far as parts and whatnot.
I am a mechanical engineering student, so I'd be interested in hearin your results. Keep us updated!