Well, like I said I went back today to the track with the shell 91 and stock exhaust, but I wasn't to happy with the results. First of all the weather didn't permit me on getting more than 2 runs. I did 2 back to back runs with no cool down but the weather was really cold. My best run out of the 2 was 12.85@110.96 mph with a 1.96 60ft. The other was a 13.06 but the traction was bad with some wheel hop, so I backed off a little and that was it for today. Anyways let me put it this way, my car was running a mile per hour faster last time in warmer weather. So I guess that the 94 octane fuel I was using and the Mina axle back do make the car run a little better. I am happy with the ETs that the car runs considering the 60ft times but I am not happy with the top end mph at the end of the 1/4 mile, it should be quicker. I just can't see why it doesn't have more mph than that, the car only has about 30000 miles on it. I guess it is what it is.

 

Glad you were able to confirm the octane and exhaust weren't a detriment to your times or your trap speed. Now throw them back on and start looking for other ways to get more power!