360 does not seem to be making power and is slow in the 1/8. Need help and/or suggestions

Shouldnt be a fuel pump issue if its a dog right out of the gate.
Seen guys go 9’s with 5/16 line.
Seem to me more the convertor is junk.
Even a stock convertor it should 60 foot better if it isnt spinning the tire on the hit, and he said it wasnt