New mods, same times as stock?
09-18-2006, 08:41 AM
#1
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New mods, same times as stock? Alright, i've run at the track numerous times with a catback and cutout. 13.5 @ 103 was my most consistant time in cooler fall / winter weather, about a year and a few months ago.
I now have mods listed in sig minus the y2k rims instead 18" zo6 rims that are obviously heavier, but they have drag radials in the back ( which I did not heat up while racing )
I raced for my first time w/ those mods ( lt's , lid' etc..) and ran a great 13.5@103 TWICE. Same 60ft time and everything. Now I know that my car is running pretty rich after the longtube install and air/egr removal, but shouldnt it have atleast gained something without a tune? On the way to the track I went WOT , and the car behinid me said black smoke was pouring out, which is the second time i've heard this since i had the lt's installed. My car has 126k miles and is an a4.
I now have mods listed in sig minus the y2k rims instead 18" zo6 rims that are obviously heavier, but they have drag radials in the back ( which I did not heat up while racing )
I raced for my first time w/ those mods ( lt's , lid' etc..) and ran a great 13.5@103 TWICE. Same 60ft time and everything. Now I know that my car is running pretty rich after the longtube install and air/egr removal, but shouldnt it have atleast gained something without a tune? On the way to the track I went WOT , and the car behinid me said black smoke was pouring out, which is the second time i've heard this since i had the lt's installed. My car has 126k miles and is an a4.
09-18-2006, 09:14 AM
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Yea it sounds like my car on the kit with 850psi of bottle pressure. You definitely need a tune. You'd be suprised what a little tune would do. 
Last edited by TeEnAgE pHeNoM; 09-18-2006 at 05:09 PM.
09-18-2006, 09:34 AM
#3
my car gained 6 mph in the 1/4 by adding full exhaust, with no tune. it also blew black smoke for the first few WOT passes, after that it was fine. adding headers usually will only run it rich at idle, and lean(er) that optimal at high rpm. the wheels are slowing you down more than you think. my buddy went from stock 00 z28 rims to 17x9 front / 17x11 rear and lost a solid 2 mph in the 1/4.
09-18-2006, 10:15 AM
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Originally Posted by s346k
my car gained 6 mph in the 1/4 by adding full exhaust, with no tune. it also blew black smoke for the first few WOT passes, after that it was fine. adding headers usually will only run it rich at idle, and lean(er) that optimal at high rpm. the wheels are slowing you down more than you think. my buddy went from stock 00 z28 rims to 17x9 front / 17x11 rear and lost a solid 2 mph in the 1/4.
Rims and the pro kit probably are causing a lot of the slow times, would a panhard bar help?
09-18-2006, 10:41 AM
#5
Originally Posted by BlackTA98 LS1
Rims and the pro kit probably are causing a lot of the slow times, would a panhard bar help?
). it took me adding all kinds of **** to trap 108...of course my car was no factory freak to begin with. to give you an idea of her non-driving that night, the car only trapped 81 in the 1/8 and then turned a 108 in the 1/4. i think it has a lot more left in it, but she won't let me drive it. 
09-18-2006, 10:48 AM
#6
Weather will have a huge affect on your car's performance. You ran a 13.5 @ 103 in cold/great weather a couple of years ago, and now you ran a 13.5 @ 103 with mods in summer time? That is pretty good I would say, but to actually see if you gained anything you would have to wait until you can race in similar conditions as you did stock.
Last edited by 12secSS; 09-18-2006 at 10:58 AM.
09-18-2006, 12:21 PM
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Originally Posted by 12secSS
Weather will have a huge affect on your car's performance. You ran a 13.5 @ 103 in cold/great weather a couple of years ago, and now you ran a 13.5 @ 103 with mods in summer time? That is pretty good I would say, but to actually see if you gained anything you would have to wait until you can race in similar conditions as you did stock.
Thanks
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09-18-2006, 04:14 PM
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Originally Posted by 12secSS
Weather will have a huge affect on your car's performance. You ran a 13.5 @ 103 in cold/great weather a couple of years ago, and now you ran a 13.5 @ 103 with mods in summer time? That is pretty good I would say, but to actually see if you gained anything you would have to wait until you can race in similar conditions as you did stock.
Derek
09-19-2006, 07:10 PM
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Another note of encouragement to get a tune, the extra power is there ya just gotta free it up. On my ex-Formula after adding LT's and a cam it too ran pretty well the same times/traps previous to the mods. But with just a simple MAFT and ATap (car was running pig rich too) tune it picked up almost 5 mph and 4 tenths.
09-19-2006, 07:49 PM
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Originally Posted by BillWS6Formula
Another note of encouragement to get a tune, the extra power is there ya just gotta free it up. On my ex-Formula after adding LT's and a cam it too ran pretty well the same times/traps previous to the mods. But with just a simple MAFT and ATap (car was running pig rich too) tune it picked up almost 5 mph and 4 tenths.
09-19-2006, 08:01 PM
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MAFT= Maf Translator - allows you to adjust idle and WOT fuel settings.
ATap= AutoTap - a scanning program that allows you to monitor various sensors in real time. In this case Ltrims after adjusting the MAFT settings. It's a band aid approach to tuning, but with no dyno in my area, it was the best solution available - along with track testing.
ATap= AutoTap - a scanning program that allows you to monitor various sensors in real time. In this case Ltrims after adjusting the MAFT settings. It's a band aid approach to tuning, but with no dyno in my area, it was the best solution available - along with track testing.
09-19-2006, 10:59 PM
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well tonight i ran a best of 13.540 it was bout 66 degrees outside 60 below sea level Im wondering if i can do better cuz i still had the same tank of gas that i have been having with 87 octane/91 octane mixed so im not sure if its running at 91 octane still? but for being fully stock im very happy 
09-20-2006, 07:26 PM
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Originally Posted by 2002LS1Z
Weather is your problem. I always run 3 tenths and 3 mph slower in 80+ degree weather.
09-21-2006, 05:13 PM
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Originally Posted by BlackTA98 LS1
Were you at fayetville this past sunday, thats where i was racing at.