[Fot] "Tractoring"?

[Barr, Scott]

Some of you may know MGB driver Rich Larsen and his traveling mechanic / pal Andy.  Andy is the one with the white crewcut, Butch Bohunk vocabulary and about 1,000 years of experience with making automobiles go.  You just naturally tend to listen to Andy when he offers an opinion about what you car is doing.

Well, this last race weekend at Blackhawk, Andy wandered over and stuck his head under my hood and offered the opinion that my car was "tractoring".  At first, I thought it was just a variation on the usual Triumph-motor-as-agricultural-implement joke.  But he said something about it again as we were cleaning up for the day, and I've been thinking about it since.  

I've never heard the word "tractoring" used in this way before.  Anybody have any idea what it means in this context?

Scott