I have only been to the track once since I got the optimizer and the weather was bad. There was about a 20 mph head wind blowing so I only ran a 14.6 @ 93.38, but the 60' time dropped to 2.04. One of my friends who was running his bike lost 4 mph (152 mph down to 148 mph)the same day so I feel like my car will run better than the 14.5's just don't know how much. Hopefully I will have a chance to go before it gets to hot here.