Im due to replace my timing belt, and the guy that inspects my Esprit is pretty good with exotic cars. I always see Porsches, Mercedes, and other high end cars at his shop whenever im there or drive past. And he can talk KJetronic like the Bosch book. He was telling me that the cam timing on my Esprit could be adjusted to greatly reduce the turbo lag that it has presently. My question is, do I have to necessarily buy green dot pulleys or is it possible to tweak the cam timing to create this gain in low end driveability? I was thinking upon doing my belt, maybe I could adjust the cam timing if there was a "modified" position for the existing cam gears when doing so, or if the green dot pulleys are a necessity, like maybe they are a different size or number of teeth.