I agree with crupdawg. In my car, I keep my rpm's at 2K - 4K, usually averaging 2,600-2,700rpm. I don't like to go below 2K rpm's because my engine is not happy there. If you want maximum acceleration, then the simple answer is to just redline every gear. You do lose lots of torque and hp after 6,000rpm, but you should go to redline because you want to hold the easier gear for as long as possible before you upshift to a harder gear.