'Walk' implies a slow increase in distance between two cars (at a speed much the same as walking). The proper word would be 'rape', not 'walk'. A stock LT1 w/ a well driven 6-speed will often be in the 13.8-14.0 range. That's about 6-7 car lengths behind a stock LS1, and about 2.6 bus lengths ahead of you (2.4 bus lengths if he has an auto).