Does any one know if Nissan sells the Anniversary Edition muffler with the turn down tips? The AE is said to get its 5 extra horsepower from its muffler with is shared with the I30.

 

The muffler is the same, only difference is the tips hang down. I don't think the AE or I30 actually have 5 more HP, it's just B.S. sales #'s.

 

True, but some say that some pipes are wider in the engine or somewhere, im not 2 sure about it. But definately the muffler is the exact same, i wish i had the straight out muffler on mine. guess i'll jus have 2 get tips.

 

No one has found any different pipes or anything on the AE's, the extra 5 HP is pure B.S. if you ask me.

 

Im not saying I dont believe you, because I am naturally sceptic about everything..but do you think Nissan would flat out blatently lie about the h.p. rating of of the I35 vs maxima? wouldnt they run into problems legally? Your probably right, the extra 5 hp is probably an incentive to buy the more expensive 135...but it would definitly be worth finding out, a stock exhaust system making 5 more hp?...hmmmm.

 

I remember reading somewhere that the exhaust in the AE has a less restrictive muffler. It had some sort of valve system that opened up during full throttle but stayed closed during idle and regular driving. I believe the 2K2s come stock w/ this exhaust system but the only 2K1 that had it was the AE. Just a thought.

Tony

 

tonys right, at least from my perspective. the ae muffler has a baffle that opens up at full throttle and stays closed at low revs to create backpressure to make more torque. ive driven a 00 and my AE and i can tell a difference. like the difference between a car with an intake and a car with stock intake.

 

So it stands to reason that strapping on the AE muffler would yeild 5 extra HP on my 2K1 SE. That should be an easy mod.

 

I am pretty sure all 5th gens have the variable muffler you are talking about. The valve closes to keep low end torque, and at WOT the valve opens, allowing for high end

 

Im almost for sure that all 2k maxes have this, as well as the I30s.

 

they do. now that is turning cold (here at least) go out in the morning and start your car. look at the exhaust, and you will see it coming out of only one tip. that is the baffle.

 

What I found was that other parts of the exhaust (Y-pipe) I believe are slightly less restrictive. Another claim on a website. I know people have compared part numbers off the mufflers and they are exactly the same so the claim that it's the muffler is BS. Plus, people removing the exhaust after the cat have shown little gains so how could a magic muffler up it 5hp?

I have two theories:

1. Is the exhaust above the cat (read: Y-pipe)
2. Its BS

I'd give it 50/50 for either theory.

 

I'm emailing Nissan. I'll let you know what they tell me. If it has anything to do with any part of the car that is externally visible or even slightly interally, we'll figure out what kind of BS it is. I'm personally voting for y-pipe differences since I have an AE and value my 5 hp. If I found out it was bs.....I mean.....how could I.....what would I........

 

perhaps my theory would explain the mystical 5hp gained from the muffles on the ae and i30.. it's the angled tips... now this is definately not a joke.. the explaination for it would be the difference between high and low pressure. Back when i was taking autotech, i remembered this learning about exhaust systems.. In some domestic cars they have a "H" pipe.. it's a dual exhaust, one side of the exhaust helps "pull" the other side exhaust out creating better flow. how it works is that the exhaust is not a constant flow, the pistons move up and down intake, compression, combustion, exhuast.. and for every 3 cycles comes only one exhaust. so it's more of a puff puff puff type of flow, so one side would build high pressue, where the other side would have a low pressue flow, thus the high pressure would pull the low pressure side out making the exhaust gas flow faster..
now with the maxima and i30 mufflers, instead of using exhaust gas, it probably gets it's high pressure air current from the exterior of the car, having angled the exhaust tips perpendicular to the high pressure underbody air flow, may infact pull the exhaust out. it's similar to how some cars would have their exhaust sticking out the side of the car. the turbulance from outside of the car helps pull the ehxuast out.. this is pretty much how an airbrush works.. now of course this is all a theory. whether it's true or not can only be proved by multiple tests... i find it quite possibly they had simulated the cars movement by creating some wind generated by a fan while putting the car on a dynojet.. it's all possible..
-daniel

 

take ur muffler and with a plyer, just bend the tips down...voila! u have a I30/Anniv muffler

 

Yeah, get medieval on your Maxima's a$$ with a pair of pliers and a blowtorch.

 

I agree and have heard something close to this reading a publication some time ago.

 

Actually the reason it adds the 5hp is because the muffler has a built in flap that builds back-pressure at low rpm and when you gun it the flap opens becoming a straighter exhaust flow. I have an AE muffler with about 3k miles but i changed the tips. if interested make me an offer and ill get a pic posted...

 

By 'changed the tips'...what exactly was required?

Thanks!

 

actually all fifth gen maximas have that too.. or another possiblity is that the spring rate of teh spring that controls the valve could be different..

 

it makes sense for the bent tips to provide a little better flow. If the tips point downward, they will be perpendicular to the air flow caused by the movement of the car. This perpendicular air flow could help to pull out the exhaust a little faster. Enough to claim a 5 hp gain though,

 

See Paul's response in this thread......

https://maxima.org/forums/showthread...&highlight=227

 

Mingo, if this was true would'nt every car have exaust tips aiming down? You would think high powered performance cars would have adapted this into there cars a long/ long time ago. I'm sorry, but I don't buy it. Has anyone dynoed a stock AE or I30? This would be proof that it's all B.S. BTW thanks for the exelent write up you provided on this theory.

 

 

I agree with what you said but this is certainly not the case. Here in Canada all maximas have straight out pipes even AE's but AE's still got that 5hp extra rating. so...

 

did you find out? please let me know. i'm very curious to find out what makes the 5hp difference. i know the 2K maxima has the variable muffler:

http://www.womanmotorist.com/review/...ma-2k-02.shtml

The engine has been refined through use of the Nissan Variable Induction System (NVIS) air intake control, new equal length exhaust pipes and the addition of a new variable capacity muffler derived from the one on the high performance Nissan Skyline GT-R. A special muffler flap valve, using high temperature aerospace spring technology and materials, opens at 2,000-2,400 rpm and above -- reducing exhaust system back pressure. These changes help increase the engine's horsepower from 190 to 222 insuring performance that puts the competition to shame.

 

This has already been discussed and it's more than just a theory. Angled tips are good for about 2 to 3 FWHP. That's consistent with Nissan's inflated 5 HP increase. And it's about what you can expect from replacing the OEM muffler with a straight-through design. So Hoon's idea about bending the tips with a pair of pliers might not be a bad one.