camaroextra

iTrader: (10)

Grr im really frusturated

ok 2002 Z28 A4 42k perfect condition

with a lid only I ran a 13.262 @106.6 with a 2.10660'

since then i have

-!rear seats
-ported tb
-cutout (towards the back, not right up in the y-pipe)
-cut 4" holes in the bumper support and ran 4" duct up to the bottom of the lid (almost the sux2bu intake, but i havent cut the part of the frame that the lid sit on yet, but its still blowing air up into my FRA)
-ditched the 16" 245 daytonas for 17" 275 kumhos (yeah i know, not the greatest tire in the world, but better than daytonas)

so now im getting 13.5's and 13.8' with horrible 60' times (like 2.3's!)
but tonight I even cut a 2.085 60' and ran a 13.39 @105

WTF. I dont understand. At first i thought it was traction, but when i got my best 60' time ever (2.085) i still ran slower than i did stock.

This isnt asking what mods to do (yeah i know lca's big stall blah blah)

I wanna know what did i do wrong?

LC

Weather maybe?

my car did the same when I installed headers and duals.. went up like 1 second.. but tires were my problem...

Slow00ls1T/a

you ran at speedworld right?
and when did u first get the lid only time bc im sure the weather was alot diffrent

camaroextra

iTrader: (10)

yeah OSW. Umm i ran that on sunday funday during the winter, it was about 65

but tonight it cooled off, it was probably high 70's

Slow00ls1T/a

ya i ran funday sunday in february and recently ran like 2 weeks ago and i was slower by 2 tenths and when i ran in february it was very slow shifting

camaroextra

iTrader: (10)

That makes me feel a little better. i guess. i just think my mods would overcomea 15 degree weather difference

BuBbABFP

iTrader: (3)

dont worry man, i had TSP rumbler,ftra,lid,and nittos and run a best of 12.9 in the night, the i went on a hella hot day witht he mods i have now and was running 13.1's i was hella pist off but then we managed to get it down to like a 12.8, but still if it was a cool day it would have done better.

tektrans

iTrader: (23)

Yeah, weather plays a big part. In good weather I usually run 10.5's, since my last time out I removed the front bumper support, went to the track last night, 10.6's was all I could get, it was more humid and warmer since my last time out.
You really could work on that 60' with some better tires for the track though.

Villain281H

iTrader: (5)

Weather is a big part. Winter weather to weather around now (especially with this front sitting over us) is probably worth at least a tenth if not more in lost time.

I'm wondering if tuning the car after the TB install and cutout might help a little. I didn't think it mattered much on mild-modified cars until Jeremy Formato found 12 rwhp and 25 ftlb on my Formula, and I have about the same mods as you do.

Derek

mike c.

iTrader: (1)

last year in 65-70 deg weather my car would go 11.4's -11.3(11.33 best motor)all day in may-june. last year i went to the track in early november and ran low-11.2's all day and even did a best of 11.15. my mph also went up 2.5 to 3mph in the colder weather. so...the weather can hurt or help you out.

Optimus_Prime

iTrader: (4)

Were you slow off the line when the light turned green?

camaroextra

iTrader: (10)

are you refering to my reaction time? when i go its fun run rules, my reaction time isnt factored into my et

and i was trying to leave as hard as i can without spinning

Optimus_Prime

iTrader: (4)

Maybe your ecu hasn't adjusted for when you took the cutout off...But I'm a noob

camaroextra

iTrader: (10)

Well im pretty sure my car has complete a drive cycle since then, iv had the cut out and ported tb for at least 4 months

y2k_ta

iTrader: (80)

Your reaction time is never factored into your e.t. The e.t. clock starts running the instant you leave the starting line. You could theoretically sit at the line for 30 seconds after the tree goes green, and your e.t. would not be affected by it.

02SOMWS6

iTrader: (6)

switching from a 16" rim to a set of 17 " rims is killing your gearing.

The Juggernaut

iTrader: (7)

Might need to be tuned.

camaroextra

iTrader: (10)

Tires are the same height. The snoflake with the 245/45/16 is the same height as the new rims with the 275/40/17. I bet theres maybe about an inch max in diameter difference

CamTom12

iTrader: (1)

Temperature isn't the only key factor in weather. Humidity is huge, too. Down here I've noticed the winters are a lot dryer than the summer months

camaroextra

iTrader: (10)

Yeah it is humid as a bitch here. Oh well ill be installing headers soon, then saving up for some nitrous, so i dont have to worry about 13's for too much longer