Well, right before I made my first run I reset the computer. The whole day, I absolutely could not get within 1.5 seconds of my quickest run from a year ago. Nothing's changed other than this time I had a 1/4 tank of gas compared to a full tank when I ran last year. The temperature was within a few degrees as well as the humidity. So with those facts, I was really expecting at least a 9.35 in the 1/8.

How long does the car take to start running normal? I thought that the car would run quicker after a computer reset.

I have to add, though, that my times did start to improve a tenth at a time.

 

You're post is confusing. Are you saying your car was 1.5 seconds slower this time out? If so, there is something very wrong with your car or you got the wrong timeslip the first time out.

Post your prior best timeslip and your new slower time slip, increment by increment.

BTW, contrary popular belief, the reset will make you slower, not quicker. A reset results in an overly rich a/f. Over numerous starts, the a/f will be leaned out. It wouldn't surprise me if an ecu reset would net in a .1-.2 second slower ET.

 

My error, thanks for correcting me Dave. I totally meant 1.5 TENTHS of a second slower. I also meant that my times improved a hundreth at a time. Thanks, though, for clarifying that an ECU reset will result in slower times - I was getting frustrated. (It's weird because the throttle seems more responsive after a reset.) On the upside, my reaction times are improving.

My best 1/8 mile this time last year:
9.45@75.10 w/a 2.18 60'

Yesterday:
1st run - 9.62@74.39 w/a 2.27 60'
2nd run - 9.73@74.15 w/a 2.35 60' (this run was without a preload)
3rd run - 9.62@74.01 w/a 2.24 60'
4th run - 9.61@74.13 w/a 2.24 60'
5th run - 9.60@74.13 w/a 2.22 60'

I would dare say that considering that I had a 1/4 tank of gas this time around as opposed to a full tank, a reset would slow times by .1 - .3 seconds.

 

I noticed I ran slower when I had 1/4 tank of gas compared to a 1/2 a tank of gas. Explain that one to me.

 

4 to 5 gallons of fuel will hardly make a difference in the way you car performs. Your 60 foot could have been worse, worse conditions, different track, etc.

 

A gallon of gas weighs about 6lbs! I've had all my best times with a 1/4 or less. When I leave the track my low fuel light is on


2003 G35 Sedan 6MT
13.84 @ 101 (stock)