I have talked to at least 3 teams racing alky that have tried, with no sucess, or help with O2 sensores .
They seem to help with gas, but not alky.
Still the best is reading spark plugs, and ET slips.
Yes, engine temps help, but you can build real good temp by leaning the barrel valve, but to check temp build up, check the engine temp with a temp gun after the run.
I try to get my engine temp to 180° to 200° while staging the car, [ with water in the block/ heads, 160° dry] alky burns better with a hot engine.
I know some bracket racers that change their engine temp to run the number, cooler to slow down, hotter to run quicker.
Jon Hansen, JrFuel Dragster Association