I took my car to the track bone stock run it 8-10 times my best was 13.40@108 my worst was 13.56@107 I had a baseline dyno done with borlas and a vortex intake the car made 314.3rwhp and 327.6 rwtq. I had the procharger installed last march and went to the track then my best time was my first run of 12.56@115.9mph then i ran like a 12.7 then a 12.9 then a 13.2. I even let the car cool down between runs. I went back to the track tonight and only got 2 runs in because they have qualifying for a doorslammers event, MAN THOSE CARS ARE INSANE they were all running mid 6s @ 200mph :eek: anyways my results tonight were:

---------run 1--------run2
R/T-----.547---------1.000
60ft----2.513--------1.957
330----6.222--------5.500
1/8-----9.062-------8.418
mph----87.38-------83.94
1000--11.458------10.931
1/4----13.473------13.048
mph---111.37------106.16

Dont laugh at my first run tonight I almost killed it off the line :lol: OK you can laugh. But seriously after my first trip to the track after the blower install i asked my tuner why is my car getting slower after every run? He thinks my belt could be slipping. You can see my mods in my sig I would just like some of your opinions on how i can gain 165rwhp and only gain .8 in the 1/4 on my best run? also why would my car go slower and slower and how was i running 107-108mph stock and im running 106mph now? :confused:


[Modified by mods to come, 9:58 PM 7/25/2003]

 

Belt slippage off of the line is what is killing your new S/C setup... Get that fixed and it will go much faster.

vetterdstr :cheers:

 

With the slippage, try to feather the throttle and ease it down until you are going about 40-50mph then put it down. Your time may not be that great, but the trap speed should come up to the low to mid 120s at least.

 

Thanks for the replys. I am going to my tuner today to talk about how to fix this. :cheers:

 

Let us know what your tuner says... ok? :)

vetterdstr :cheers:

 

Several other things could also be going on. Here are a few things to consider:

* IATs going up and timing being pulled by PCM
* coolant temp going up and timing being pulled by PCM
* KR causing timing to be pulled
* Fuel pressure drop causing KR
* clutch slipping
* boost leak

I've had all of the above in the past. I think I have it all resolved now, but I have not been to the track with all the fixes in place.


[Modified by QuickSilver2002, 9:20 AM 7/26/2003]

 

Talked with my tuner today, he thinks the belt is slipping. He is ordering me a manual tensioner, says this should fix it. Starting monday I will be working out of town indefinitely, but will be home on the weekends, so I'm not sure when it will get installed, but I will let yall know my results. Again thanks for everyones input. :cheers:

 

If the tensioner doesnt fix it I will look into these possiblities. Hopefully the tensioner solves it.