Just a thought, why take a car up to redline anyway? Considering most vehicles make peak HP or Torque way before redline, what sense does it make to take them up to redline? I know in my vehicle peak Torque is made at 2200 rpms, and peak horsepower is at 5200 (redline is 6,000). So I figure keeping rpms down to 5400 max is the way to go. BTW my vehicle is an old Datsun 280zx.