Does anybody have a y-pipe installed with the rest of the exhaust system stock? Does it still give noticable performance gains? How does it sound? ThANKS!!

 

Yes they do. Yes it does. Sounds great!

 

I do, i noticed HP gains and the sound is AWESOME.

 

yes yes and good

 

Same as the others said.

 

sounded like crap on my car...my stock muffler would put like a go-kart from the outside...it was acceptable for a while...but then I just got fed up...remember, every little bit adds up...so 1hp for a high flow cat, 5 for the b pipe, 1-2 for the muffler...not to mention they are usually lighter than stock....but yes, the y pipe alone is the quietest way to go (it will still give good gains)....although I hated the sound of it with the stock catback!

 

Well worth the money. No real noticable sound increase though. At low RPMs w/no load there is slight grumble that I think sounds great.

As for performance, it is the best mod you can do for under $1k (in my opinion)

 

There's a reason that most people on the .org consider it the best bang-for-the-buck mod you can do. The performance gains are good and noticeable, supposedly around 10hp, although I don't have anything to back that number up with myself. I know my butt dyno feels more pull from around 3000rpm to redlineish or so. It might take a little time for the ECU to adjust to the change and fully utilize it, though... I didn't feel a significant difference right after putting it on, but a couple of weeks later... wow!

I'm going to disagree with sryth about the sound... I don't think it's a HUGE difference like some people do, but I think it's definitely noticeable. My car sounds lower and more rumbly, especially when it starts to hit that sweet spot around 3000rpm. It's more noticeable sitting inside the car, due to acoustics, but if you're listening for it you can hear the difference outside too.

Final note, if you do end up getting an aftermarket y-pipe you'll probably want to read the following thread... a lot of people have rattling problems with their aftermarket pipe, and it seems to have solved a lot of them.

http://forums.maxima.org/showthread.php?t=310324

 

So the ECU has artificial intelligence now? woah cool!!! it can adapt to every part you add!!!

 

...huh? If I'm being an ignorant newb, tell me in plain language so I can learn. I thought the ECU does exactly that, changes what it's doing based on the info it's getting from the various sensors? I know for sure that I didn't feel a big difference the day I put the y-pipe on, but later on I could, but I'm willing to accept that as just psychological crap on my own part.

 

Its not a HUGE difference although some people say its so but with a stock exhaust system it sounds great.

 

im pretty sure the ecu has values and algorithms programmed into it that can change different settings depending on what input it recieves, but i dont think it can accommodate for a new part unless you program it yourself

 

Huh. Ownage accepted, then, I guess I was wrong. Disregard what I said about that then, time for some research.

 

this not only applies to ecu's in cars, but all computers as well... computers do not "learn" they are incapabable as of right now to do so. they only respond to the information programmed into them.

 

Well, I know there's software that can learn to some extent... like the newerish mobile phones with adaptive T-9 for text input, or AutoCorrect in Microsoft Office (although that example still sucks, learning or no). "Learning" in this case meaning changing values to match unexpected usage, even if it's just by applying a simple programmed algorithm to do it. I thought our ECUs, or at least newer ones, were capable of that kind of adapting. Guess I was wrong, though... someone should start developing adaptive ECUs, if they aren't already!

 

heres a link for a video that somebody sent me to host of them reving there car with a ypipe and 5th gen muffler.....

http://members.***.net/sunten1/maxima%20y%20pipe.WMV

 

I think people put to much stress on their personal definitions of terms like 'learn'.

As far as our ECU is concerned, I know it can 'remember' and it does adapt to new information it recieves from it's sensors. If you don't call this 'learning', fine; I do, as I use a looser (Oxford dictionary's) definition of the word.

I believe you are confusing the words 'learn' and 'think'. Computers can learn, they cannot think...yet.