i've been pondering about this for a while and still cannot figure out. with the mods i have (y-pipe and TS ecu), i ran the quarter at 15.0@92 mph 3 times

my max doesnt feel as if something is being restricted but something tells me something is not right, i doubt its my launch, even with my crappy 2.338 60 foot time, it wouldnt produce these slow times, someone help me on whats wrong...i already posted in the 1/4 mile forum, but not much help.

i've heard about how iridium plugs arent meant for NA cars with just bolt-ons, but i doubt that would make a big difference in the 1/4. my clutch is somewhat slipping (cant chirp 2nd gear) but i doubt that is also a major problem. with these 2 things that might make a difference, i doubt it will help me much.

i have no codes in the ECU, only 0505, which means nothing

one other thing that might have done something might be the o2 sensor, when i was getting my y-pipe reinstalled, i accidently dropped the front of the pipe with the o2 sensor, and cut the cord, so i threw an o2 sensor code, but then my dad just reattached the wire and i reset the ecu and the code went away, so i dont think the o2 sensor is the problem....but could it be?

my mods list as
Warspeed Y-Pipe
TS ECU
NGK Iridium IX plugs
Intake snorkel removed
Short Shifter

 

Put NGK's back in there and get a new clutch.

O2's don't have any effect on performance at WOT.

You could have an overactive KS that's pulling back your timing and stealing some power. Is all your maintenance up to date? Fuel filter, intake cleaned, fuel injection service. Do you have heavy 17 or 18" rims on the car?

 

I have run my quickest 1/4 N/A time with the NGK Iridium plugs, leave em in.

 

How many miles on the engine? Maybe that is as fast as it will go. What kind of time were you expecting, perhaps 0.1 or 0.2 faster at the most. One could attribute that difference to the driver.

 

Bring the 60' down, get a clutch and say hello to 14's.

 

i have done some maintenance, like fuel filter, oil change

i have the stock 15" sawblades.

 

i have about 109K, but i see alot of people with way over 100K miles and still running great times, equivilant to lower mileage maximas.

i was hoping to get 14.7 or around there.