well, just got bak from the track a little while ago. Ran horrible times and have a few questions. This is not a track question, its more about WTF is wrong with my car, performance wise. well, i think i have an idea wut the problem is, but want to see if anyone has a first reaction to wut it could be. A year ago, my first time at the track, i ran a 16.5 completely stock with a system in trunk and a kid along with me. Tonight i took the system out and no kids! Now i have y-pipe, catback, hacked airbox. Also, im an auto. 1st run: a freakin 16.8. 2nd and 3rd runs: 16.1. Last run: 17!!!!! First, how the heck do i run 16.8 and then a freakin 16.1., and then a 17! Ill tell u y..... "O/D off" on my car sukssss!! i always thought "OD off" was quicker. guess not on my car. well, i wanna know y other maximas like mine should be running atleast a low 15, high 14. and mine runs 16.1 and wen it feels like it 17s?? Sorry so long, im frustrated, just got whooped by 4 seconds by a 240sx.

 

Well, like most people ... check your ECU codes before posting a is wrong with my car thread, ...

post the complete slip ... and run your car when it's at its lightest, not right after a meal (fill up) and take all the stereo equipment out... spare etc. You're in Miami, so I'm sure altitude wasn't a factor.

What re you shifting @?

 

cool... is it just me or how do u shift by urself with an auto ?
Sorry man, Dont mean ANY flaming whatsoever

 

1/2/N/D.. 10 chars

 

i did check the ECU CODES, but if u read my post i was stating that i had an idea, but wanted to see if the problem is so obvious that people would be able to tell right off the bat!! i ran it at less than 1/4 tank of gas, 93 octane of course, no equipment except amp, which to me is insignificant weight, i dont agree with taking out spare b/c u never know wut happens on the way to or from the track. im auto, so i just stick it in "D" b/c im scared of messin up my tranny by manually shifting it. heres my 1st two runs slips:
1St
R/T .446
60' 2.693,
330 7.249,
1/8 10.981,
MPH 66.81,
1000 14.134,
1/4 16.831,
MPH 83.4

2nd Run (Best)
R/T .318
60' 2.444
330 6.821
1/8 10.415
MPH 69.35
1000 13.469
1/4 16.096
MPH 85.61

 

Depends on mods.. On both mine I do, since my 95 the rev limiter has been moved to 7200 and makes good power there ... My 03 puts down ~215 @ the wheels @ redline, but peaks @ 5700 233whp, so it benefits ... You out the lever in "1" then when the needle reads 6800, or in my 03, 6200, go up to "2" and so one .. only allowed 2 shifts in a 1/4 since the auto ratios are so effing tall.

Sure you didn't know about shift points relative to hp & RPM, regardless of transmission, you're only 16 ...

 

maybe its reaction time?.....and the extra stuff in the trunk????

 

from wut i understand, the r/t has nothing to do with my 1/4 time wutsoever at this track. i took out the heaviest item in my trunk, the speaker box. the rest i refuse to remove (spare and jack)

 

R/T has NOTHING to do with ET .. for the umpteenth time. ..

 

wut he said ^

 

to imporve on your times, you're going to have to sacrifice a little weight (spare and some fuel) and also, wha do you think is wrong with the car? Is the tranny slipping, do you have a ghost code for the KS, is it well maintained?

 

ive never had any problems with it, 120,000 miles, but still in great condition. well, just so u know i do have a cel on once i put my y-pipe on. one is for o2 sensor, the other for...u guessed it, KS. from reading these forums for soo long, it has to be that correct? wut kinda times should i be running? if they are wut i think they r i did not know that a ks would hurt my performance THAT much! tonight sucked for me, the whole time i was thinkin to myself "Theres something wrong with my car, and i bet that 0304 is the WHOLE problem", but i dont know too much bout cars so i didnt know the circumstances of a bad ks!

 

That's probably your problem ... KS ... You never stated that in your original post...

 

well, my thing was i wanted to see if anyone could read my first post and right off the bat say "Knock Sensor, definitely". i wanted to see if it sounds like a knock sensor no question about it, by people who dont even know if i have a code. thats my way of determining the seriousness of the ks problem.

 

wut times should a car in my position run? atleast a freakin 15 i hope, sh*t.

 

There is a big difference when the KS is bad. The ECU will run on safe map when you are at 30% or more throttle cutting off timing advance. That's when it hurts you performance-wise, thus your times sucked tonite. To get more details regarding the ks and its effects on timing, read this. Forget about track times for now, get that KS replaced asap!

 

wanna see the difference...

this is a shame for me to show...but since u want proof...here...*right click and save

http://www.naisaproductions.net/videos/i30_vs_tc.mpg

 

thats a coincidence cefiro, cuz tonight i actually raced a tc. dont know if it was supercharged tho. i beat it to the end of the track, but he ran a 16.112 and i ran 16.117. so i suppose it wasnt s/c. thank u dr-max. i have a quik noob question, are ks a big problem for other makes of cars or just a big problem in maximas. should i let the nissan stealership do this for me, or is it a waste of the extra cash that another shop can do for a lot less? if u understood that grammar!

 

I can't speak for other car makes regarding KS issue. Regardless of that, Maximas with over 100k miles are usually more prone to failing KS. Sensors do go bad in time so take that into consideration as well. It is not hard to replace the KS, search the stickies for how-to's. Most of us replaced our own KS. Get your KS from the dealer, the cheaper KS found in eBay are not as durable and will go out sooner than genuine Nissan ones.

 

That is pretty embarrassing loosing to a TC. Those things only have 160hp/163tq, unless the guy you raced is s/c'd. Still a Maxima with good bolt-on go fast mods can give it a run for its money. Also, that guy in the TC was constantly loosing traction at launch. You could have gained some on him from get go. But taking into consideration that your KS is out, it doesn't suprise me why you lost. The VQ turns into an instant slug when the KS is out. What's more upsetting is listening to your intake and exhaust roar yet the car barely moves.

 

gotcha, i wish i woulda checked for the ks code last year wen i ran my 16.5 stock, maybe it was bad then too! or maybe not. u've been a big help to me DR, i almost sh*t my pants last night thinking my car was breaking. u have no idea, it was slowwww. i really need to swap to 5 speed too. maybe all this drag racing will mess up my auto and then ill HAVE to get a new transmission. i did manage to beat tha tc and a turboed jetta to the end of the dragstrip though. heres another question, i was just messing around manually shifting, is it normal to feel such a "harsher" shift wen shifting manually? are there any consequences for shifting from "1" to "D"? i accidentally shifted past "2" straight to D.

 

dont get me wrong though, im certainly not hoping for my tranny to go, or anything for that matter, cuz im not wut u would call "loaded" rite this moment. i would be car-less for a while.

 

Your auto tranny cannot take that constant abuse although that's the only way to shift when you want to drag race. Keep in mind that your tranny is not made for that kind of abuse either. You can do a valve body mod to improve shifting. Search the stickies, all your questions are covered there.

 

well, actually i ran these horrible times in "D". maybe if im not too scared next time, ill try that shifting, but i doubt it highly. i think imma just save for a swap. best thing to do.

 

just read the stickies, all your answers about the KS will be there

 

first off i am not saving that vid cause it makes the max/infinity look bad. and damn i did not know the knock sensor knocked all that power away when cel pops up. i just got a o2 cel and wonder how much power i'm losing.

 

It's InfinitI Unless you're referring to stereo equiptment or an undefined #.

 

Who is the kid that was in the car the previous time you went to the track? Perhaps you should spend more time with him and forget about the track. Why continue to beat on your car when it's never going to be up to much the way you have it loaded down?

 

I really don't like the way you think ... Get to the point, don't beat around the bush, it takes up time and is not smart ... not a good way to about anything ...

 

if you have a code for the 02 sensor.................THEN THATS YOUR PROBLEM. The KS code 0304 almost never comes on by itself, it is triggered by another code (usually an 02 sensor) buy the 02 sensor you need. if theres something wrong becuase of your y-pipe, then fix it so that the sensor is reading correctly. then reset your ECU. more than likely, 0304 will dissappear.

If the 02 sensor is bad, then the ks code will come up, and timing will be retarded, and both your gas mileage and performance will suck a$$. fix the 02, the ks will be fine, usually, and presto. you run 8's in the quarter.

 

 

Didn't he say that he had an o2 sensor code too??? He should replace that and then clear the codes and see of 0304 comes back...Haven't people had the ks code pop up when o2 sensors fail?

 

 

okay, well not really. but at least youll be able to beat an n/a tc

 

Im sorry if u dont like that method, but i would have said, "my ks is bad everyone, wuts wrong?", it would sound stupid, and no one would give input and think about wut could be wrong, dont ya think? i dont know, thats the y i see it, not that serious, im getting wut i needed.

 

You're not getting what you needed .. You're getting something that you already knew ... Pretty stupid to post when you knew what was wrong, and wanted us to "figure it out" from the symptoms ...


I think I ran out of gas, it died and the needle is below "E"?

Get your car fixed, lighten it up, go to the track on a nice night (60's preferred low vapor pressure but not likely to happen in your neck of the woods ) and run a much better time, possibly as much as a second faster.

 

Your 60 foots suck, that's a big part of the problem. A good 60 foot would be 2.2 or 2.1 if you can. I'll even speculate that 2.0 is possible on street tires.

 

Not with an automatic 3.0 J ...

 

This is a really stupid thread. You have 2.44+ 60ft times, what the hell do you expect to run, 14s? Work on your 60ft times and you'll do better.

 

lol...your an auto man, what'd you expect?