About a month ago, I made my 1st trip to the strip. I have a 5AT. At that time, I had a Popcharger, test pipes and a grounding kit. My best time was as follows:

R/T 1.282
60 2.322
330 6.256
1/8 9.469
MPH 77.33
1/4 14.542
MPH 96.67

Last night, I went out again. This time I had the Popcharger, grounding kit, Test Pipes Kinetix plenum and Injen true dual exhaust. My best times were worse this time. My best time is as follows:

R/T 1.068
60 2.308
330 6.389
1/8 9.686
MPH 74.26
1/4 14.848
MPH 95.75

I am also running on stock tires. Could someone give advice as to why I ran worse times. I ran 6 runs last night and I only had 1 R/T over 1.0 and this was with my best run. My 1st time to the strip, I had 4 runs and my R/T's were all over 1.00. I have roughly 15k miles on the car, if that matters. I realize that elevation, air temp, etc makes a difference, but damn my times suck a$$!! I also noticed a drop in my MPG. Prior to the install of my exhaust and plenum, I ran a constant 20.6 MPG. Now I am running low 19's. Oh yeah, I ran an AutoX today and the strip Friday, so that is some of the reason for my lower MPG, but not all of it. I have also noticed a considerable amount of blackish **** on the inside of my exhaust pipes. I am thinking I am running rich but I dont know anything about this A/F stuff. I am going to purchase an AEM Wideband probably tomorrow so I can find out what I am running. What are ideal ratios on a NA Z? I dont really want to get an ECU reflash done now due to the cost. I am thinking of going with the Apexi SAFC and have a local tuner install and tune it. Any questions/comments are greatly appreciated. Sorry for the LONG post!!!

Zach

Zach

 

R/Ts dont mean anything unless you are using a pro tree. On test and tunes reaction time can be as high as you want the time doesnt start until your wheels move

 

ZAch

You MUST do an ECU reset before drawing any conclusions.

THe procedure that always works for me is a full 24 hour battery disconnect, followed by several spirited WOT runs after the reconnect. From my experience, the ATs are a tad more temperamental this way than the MTs. THen again, this has not been confirmed in any objective way, just my experience.

G

 

ambient temp??


track temp??

tire press/temp??

fuel load??

these all are the actors i would need to have (to make comparison)

dont fret it (and listen to gurgen's advice too)

-eS

 

I am going to try resetting the ECU when I get home from work via disconnecting the battery. Hopoefully this will help.

 

You could try this as well. Less waiting.

http://www.technosquareinc.com/350reset.htm