so I take my max out to the track this past sat and my best time is 15.9 @ 88 I am like WTF. Last year I ran 14.4 @ 93. the only thing that has changed is my clutch. Last year I had a stockie and this year I have a centerforce duel firction. I was running 87 octane last year and 93 this year. other than that same mods .32 reaction time last year and .04 this year. I cant figure out whats wrong...any suggestions.

 

this is wut everyone asks me wen i complain about my power... any codes?? maybe knock sensor??

 

maybe your ecu haven't gotten used to the 93. Try resetting the ecu. When I put the msd on my car it ran like crap, but when I had the timing advanced it ran a lot better. Before I got 23mpg(stock), now I get 25mpg. I use 91

 

What mods do you have dr. Also what were the rest of the numbers on your timeslip, besides just the ET and mph.

Reaction time has nothing to do with your 1/4 mile time so it doesn't matter.

 

It is not the ECU getting "used" to the gas....really no such thing. The ECU has two maps, one when it detects knock and one when it does not. If you have the proper octane and there is no knock then your not running on the retarded timing maps


Was there a vast weather difference between the two days? Are you sure you don't have a 0304 ghost code? Was every thing the same, between the two runs...ie; wheels/tires/weight?

 

i would i like to see the rest of the slip. your trap is quite low for that time.

 

nope I have had a bad knock sensor sense I got the car...I always use 93 even for daily driving....wr intake, ws y-pipe, ur UDP....weather last year hight 70's 70% humidity...weather last week low 70's 33% humidity

 

u have had a bad knock sensor since u got the car? maybe last year it wasnt as "bad" as it is now...my only reasonable explanation!

 

I think you got the wrong slip. What were your other times last year? I ran 14.6s@96mph with a y-pipe/intake/muffler up at Kansas City International Raceway and 14.3s@99mph with the addition of the JWT ECU/MEVI. From the guys I've talked to at KCIR, Wichita International Raceway is a bit slower than KCIR. A 14.4@93 is very suspect for a 4th gen. The trap is all wrong. I could believe it if you pulled a 1.8 60'. With your mods, 14.4s have been done, but they're 14.4s@96+mph.