I didn't use top lube my first year of racing. I put a lot of laps on the car and when I tore it down after the first season, I'd already put .003 wear on the cylinder bores. At that rate, I figured the pistons would be out flopping in the breeze within a couple of years
The next season, I used the tiny cap from the pint-size top lube container and put 3 level cap fulls in every 5 gallons of methanol. Almost no wear at all after that. I don't use top lube anymore, but I put so few laps on the car now, I'm not too worried about it.
The fuel pump could be another benefactor of top lube, but if you're running a pump with coated internals (just about every brand is now), then that probably isn't anything to worry about.
It doesn't take much to work...1 pint to 3 gallons is WAY too much and could definitely cause performance issues. 1 pint is generally used to treat a 55 gallon drum. "Power Plus" is what I'm familiar with.
Spud