Partly, but you have to be able to drive out of the corners also!!
Going fast has many aspects...which is why drag strips are for cars with no steering!
Its all about dumping the clutch and schanging gears!!
A good driver on the "track" has to have the ability to scrub speed off going into the bends, choose the turn in point, carry suitable speed through the corner, pick his line, hitt the apex, recognising the exit point and applying the power! For a car to go fast you need good brakes and suspension MORE than power!
Ron Haslem once raced a racing novice round Donnigton Park! The novice was on a 170 hp fireblade, Ron Haslem was on a 28 hp RS125!! Guess what won!!