TR theory

The reason that TRs are bad down low (and they really are!) is the fuel atomization and especially distributon. All the dyno sheets that show how great they are start at 3000RPM. Which is fine if you have very deep gears (and high stall for an auto), and don't mind shifting a lot to keep the revs up. If you want to be able to lug it down just to cruise around, it doesn't do well.

I am working on some stuff to help out this problem. The fuel distribution is a screwed up mess with any normal TR. You can make it run kind of OK by putting more fuel and timing into it to compensate for the lean cylinders at part throttle, but it drinks gas like crazy and doesn't make good torque until you get it wound up.