Just got back from a long day at the track (MSR Houston). I'm running the Howerton twin tank system with the baffled tank option.

http://www.howertonengineering.com/tanks.htm

With the baffling in the tanks, I was able to take the tank level down to about 20% without ever triggering the low level sensor failsafe. I mean this baffling works! I may not be the fastest on the track, but I was pulling some decent g's, during acceleration, deceleration and cornering. I may have been able to go lower, but I would have had to cut the next session short if I didn't refill the meth tanks.

Howerton has extremely well designed products. Thanks Jeff!