can someone send me a dyno sheet with cattman y pipe to show my friend that it does give gains that it states it does.

 

now is this friend really you???

 

no, my friend kept sayin that he doesnt believe the y pipe will give about 14 hp gain all because he saw a show on speedvision where they spent $2200 on an exhaust for a mustang GT. So because he saw that show, he doesnt believe that the y pipe will give the gains it states it does and he kept sayin that he wants to see a dyno to prove it, so ya, that is y i ask. and wouldnt i just ask for the dyno? y would i pretend my friend wants it?

 

 

anymore, he says its not legit cause it doesnt say its from a max

 

tell him he is an idiot
http://www.motorvate.ca/mvp.php/504

 

please forgive my ignorance.... but this y pipe you are talking about... this piece goes on in place of some part of the stock exhaust... does not disable any part of the standard emmisions equipment, and does not require re mapping the ecu, and you are suggesting it makes an 11% increase over stock without any decrease in the midrange ? and the factory wouldn't do this why ??? they just said... " oh, who cares about another 11% power for free in a car that we are trying to market agressively as a performance car ".... do you REALLY believe that ? really ?

 

Your ignorance is reluctantly forgiven. The aftermarket Y-pipe takes out an existing pre-cat which regulates cold start emissions. The vehicle is louder under load than stock. Look at the motorvate.ca dyno test of the Budget y-pipe. I just had a Budget y-pipe installed 2 weeks ago and I can attest to the improved performance.

Why would you doubt everyone on this Board who has gone out and bought a Y-pipe? Why don't you believe they are the best bang for the buck performance enhancement? Why don't you buy one yourself and shut the f!ck up?

 

Hey
Does your budegt y pipe sound like a stock exhaust under normal driving, and get a little louder at WOT?

 

gee.........maybe its because i don't believe in magic... or the fact that ive installed about 1/2 million dollars worth of "magic beans" for butt heads like you.... of which about 2 % of them make any genuine positive improvement, 75 % of them make more noise but contribute nothing and the remaining 23 % make the car considerably worse than it was stock... but of course you know all this.... just read this board.... people with flywheels trying to run ceramic clutches on the street... air boxes on...air boxes off... adding sensors, by passing sensors...dash boards lit up with trouble codes like christmas.... all to try to get the car to do AFTER modification as well as it did UNMODIFIED.

there are no magic beans... all engine tuning is combinations... nissan spends about a gazillion dollars with some VERY clever people mapping the fuel and ignition curves for these cars to get the most power with the least fuel. and some clown with a pipe bender whips up a pipe and claims 11 % without changing anything else....

frankly sir, you have to be just plain stupid to believe that that is true.

if it was nissan would have beat this guy to it 20 years ago. you want to tell me that you change the air box, the exhaust, and remaped the ecu fuel and timing curves and bought youself some significant power ...sure... i blelieve that all day... ive done it hundreds of times on virtually every car made... the re mapped chip industry has been around since electronic fuel injection was invented.... but so have the bozos selling the magic pipe who got their engineering training while working at burger king. and so have the people that buy the products.

 

Well you're plain stupid for not believing it to be true. This "magic pipe" removes two very restrictive pre-cats that exist in the stock y-pipe. Not only that, it has a much smoother collector that's wider in diameter than the stock unit. This modification has been proven to reduce 1/4 mile times by .3 seconds which is pretty significant considering the price. If i were you, I'd shut up and read up on **** instead of yapping about stuff you don't know nothing about.

 

So, lemme get this straight, you think...that thousands of us have y-pipes for...what>? if you wanna go argue with people about exhaust gains go to hondatech.com it seems like you would fit in well there.

 

and, why dont you try getting under your car, and looking at your stock y-pipe, you can CLEARLY see how restrictive it is (note the 2 pre-cats) and go back to your computer, look at a pic of an aftermarket y-pipe, and come back and tell us your sorry for ever doubting us.

 

I think he is a spy or something... Only us real max owners have done this mod and tested it. If he does not believe it, his lost. why does anyone have to point out other ways of power output to compare to.

 

stevexsm, im getting the hint that you work on cars for a living right, ok, you are a disgrace to any mechanic in the world. what do you think, that our cars were made back in the 80's, and the ecu's cant pick up a higher exhaust flow and compensate it self. for the love of god, in 1996 it was said that the computers in cars are way more advanced than the computers in the first space shuttle.
such as charcoal said, if you actually get your lazy a$$ up and go look under your car, you will see the difference in the two pipes, hell ill even take pictures of the two and post it on here so you can actually learn something, and not just talk out of your a$$.
oh, and another thing, the new y-pipe doesnt even make the car noticable louder, so there goes your main point in your whole little argument of magic parts.
sooo........i think i speak for the majority of us when i say, read that facts, stop working on el caminos, and actually realize the potential of bolt ons in todays generations of cars.

 

didnt know this would lead to an arguement

 

You need to quit posting and read the dyno section of this board and do some research on your own vs asking. It's all right there.

In fact the dude stating mods do nothing needs to get his uneducated **** in there too. Because we know what mods work and what mods don't. maxima.org has got to be one of the most scrutinizing bunch of folks that exist. If a mod doesn't work, we sure in hell don't end up using it. Hell we argue about the mods that DO work. hahaha

 

.......

 

It's just gonna continue when someone is on the board telling you that you wasted your money on a "magic pipe."

See what you did...j/k

 

y pipe ruins low end, but at around 4 rpm, you become a "SE LOGO" on the seats after puttin on a y pipe.

besides, we drive maximas, we mod maximas and we know what works.

y-pipe is like VTEC, suddenly it kicks in

 

all i asked was if it changed anything standard... and it clearly does... it gets rid of a very restrictive piece of exhaust as someone FINNALY pointed out...

and not just work on cars ...el camino's or otherwise... design and manufacture sports prototypes for road racing, components for indy cars and the old IMSA GTP and lights stuff... which is where i met and worked with the nissan engineers that designed a lot of the stuff that's on your cars today. i have more hours on a superflow dyno running engines than some of you have been alive... and i have a REAL degree in engineering... not something out of the back of a comic book...

so i'm happy with my backround and credentials... even if you aren't...

and all i am saying is this.... that the vast majority of bolt on stuff that you buy ( not you personally but the "community" you ) isn't worth a damn.

can your ecu adjust for added exhaust flow... no there is no sensor or parameter for that in the software.

will your car make more power at some point in the curve if you reduce or eliminate a restriction ? yes. will it be 11% and still get you thru an inspection ( if that is a concern ) no.

can you make good solid and useable gains thru intel;ligent selection of components and STILL pass an inspection ? yes....

you CAN do and accomplish anything you want from just getting the most out of the stock setting all the way to forced induction and nitrous... but every one of those mods costs you something..either in driveabilty or legality... all of which is just fine if that's what youre after... i spent 20 years giving people what they wanted whether it made sense or not...

BUT all i ever i tried to impress on them was that there are NO bolt on secret magic beans....

i have never had occasion to change a y pipe out on the mamima... that's why i asked the question.... it had " magic bean" written all over it...take out a piece of factory pipe and substitue a stainless one with a bit bigger outlet...and get 11 % .... nonsense...

BUT take out two cats and by virtue of that change the temp gradients that cross the o2 sensors and that changes the mapping to a richer part of the curve... its a three dimensional nomograph with 14 critical parameters if i remember correctly... and YES the ecu can adjust for that within reason... at closed loop i think its about 4 % which will richen it a bit up top which , under certain conditions buy you some revs there.... but not 11 % ever.

the dyno numbers are meaningless... and if you had ever run one you would understand why. the corrected numbers you see take the raw numbers and apply a correction factor. that correction factor is manually dialed in by the operator and automatically adjusted to suit other conditions.... for instance... run amotor and it makes 100 hp... take the air temp probe out of the velocity stack and lay it along side the motor and re run it and suddenly the dyno says 110 hp.... the correction factor says , in effect, " geeze if this motor really makes 100 hp at 100 deg air temp then at STD air temp it would make 110" and thats where those bogus numbers come from... all you can reley on for this stuff is common sense and a solid basic knowledge of what REALLY goes on in a scientific sense....

there was thread here about airboxes/air cleaners... the statement was made that a bigger air box means more air... then someone ( in the minority) pointed out that the motor would only use what it could use ( demand) at any given rpm.... he is correct... and the FLOW characteristics of the airbox are every bit as important as the size....

measure the opening in the the air mass sensor.... whatever number of square inches that is if the total air you are going to pass... period... now if the aircleaner is badly designed and therefore restrictive... YES a better aircleaner will pass a volume CLOSER to what the motor REALLY wants... which , will in fact make everything work better.... but if the aircleaner air box is already big enough and passes enough volume such that at WOT you can't pull a negative pressure in it ...then you are wasting your time... and your money....

look.... i made a great living dealing with enthusiasts and gear heads for a long time and i encourage every one of you to have at it.... just don't be stupid and get caught up in the hype for this stuff... those guys KNOW you and want whats in your wallet... just don't make it easy for them to grab you by the heels and shake you upside down....that's all im saying...

don't care if you believe me or not

there is no magic.... just physics and thermodynamics.... and nothing is for free.... every gain you make somewhere, costs you something somewhere else....

 

Your explains aren't very valid.
3-gens don't use precats have have documented Y pipe gains on both correct/non-corrected dynos and on the 1/4 strip.

It's odd that you worked on race cars. How did you document hp gains/losses if not on a dyno??

 

then why knock it unless you tried it. uwere so skeptical about it from the start."magical beans"? I've raced it with and with out....against a stock max....and to make thing simple uhh ...e=mc2

 

Please...PLEASE, take a min. and realize that Jeff and I own you. So, PLEASE stop arguing with us, so we dont have to make you look stupid again.

 

subscribed

 

damn. I don't get it, why keep arguing? Jeff and Charcoal are right on.

Better hp on the dyno, better times in the 1/4 mile. What else do you want out of your car, Steve?

Go ask Aaron92SE how much his 1/4 mile improved with every mod he has (he's documented nearly everything).

Just because Nissan designs a car a certain way, doesn't mean it's the best way.

To be honest, on the 3rd gen (I have never really looked at a 4th or 5th gen) I think they designed the stock y-pipe so it would be easier to get on and off (streamlining production, maybe?). My Cattman was pretty difficult to get on because the straighter piping on the y coming from the rear header was right in the way of one of the bolts. It wasn't impossible, but it took a lot more time and time=$$ for a company making thousands and thousands of cars. The same could be said about a lot of things on almost any car. Shortcuts can save millions to them. If it knocks off 10 or so hp from a 200 hp car, no biggie, since it saves XXX manhours over the course of the production. This is just a possibility, but these kind of things happen all the time.

 

Lets not forget that emissions have alot to do with factory restrictions. The horrible design of the factory Y-pipe could be strictly to help choke the performance of the engine to meet federal emission guide lines. Or it could simply be to help out low end torque while sacrificing some mid range & top end power. You never know why manufacturers design products a certain way. There are hundreds of vehicles I could think of that have some kind of a flawed design. Obviously the aftermarket Y-pipe for our vehicles makes a proven improvement or people wouldn't waste there time or money. Everyone on this board understands what works, what doesn't & what is a marketing gimmick to steal our hard earned dollars. The reason people come to our community to learn about there Maxima's is because we have proven through trial & error many times what is worth improving on the car. That is why we reccomend manufaturers that have proven to us that there product's are worth a damn. You don't find post here were people say aww man you gotta try out this new billet throttle cable rotor. It saved me .01 ounces of weight & made my throttle response more snappy. We all know whats BS & what's not BS!!! And those of us who don't learn very quickly how to determine the difference between the two because we all take the time to make sure other maxima owners don't give the others a poor name by stating things that are not true or reccomend parts that's don't change squat. Hell you can even find companies that produce products for the Maxima based on information provided by us Maxima .org!!!

 

clearly a reasoned opinion isn't what is required here. the bottom line is always perceived value.... you buy your pipe and put in on and like it.... that's all that counts. if it genuinely makes better 1/4 mile times and doesn't screw you up in other areas, then that's great too... you want to believe the advertising hype and the word processor dyno sheets...ok with me...

and yes...i ran the dyno to do engine development programs and evaluate components but under rigorously controlled and repeatable conditions so that the results were meaningful. and when pipe manufacturers came to us and magic additive guys came to us and wanted magic dyno sheets to support their claims and advertising , i ran the tests and provided them the objective results...and refused to employ "magic " correction factors...

i am not now , nor have i said anywhere that your mystical Y pipe doesn't work. i was unfamiliar with it and asked about it... the implication was that it takes off one piece of pipe and replaces it with another similar piece of pipe... and if that is the case , the notion of an 11% gain is nonsense....

if you had had anything intelligent or convincing to say about it between the hysteria and screaming, then , maybe i would manufacture one for my car...but nothing like that was forthcoming...
on the other hand, if there is more to it and it removes a choke point in the exhaust that the factory put in for whatever reason... then thats a different story...and the end of the story .

as for owning me.... you clearly don't know enough to find your butts with both hands. you are the perfect consumer.

the entertaiment value of this forum is priceless.... the technical value is about a 2 out of 10

 

You dude is plain ignorant!

 

yeah I got smoked by like 2 car length when I was stock against a max with bigger milage that just had y-pipe, intake (1-3), and axle back (1-3hp). The guy didn't even go in third, in third I would get raped up the a$$. That's what convinced me.

 

When Steve claims to be an engineer, does he mean armchair engineer?

 

Wow this thread got heated in a hurry. The fact is that there are people on this board who do testing and research on parts and find out what works, and the rest of the people without the know-how, means or inclination to do such testing will go along with what the people who have tested say is the best thing to go with. That is the way it is in the consumer car world. We're not developing IMSA GTP cars here, nor FIA GT cars, nor any other race cars for any other race series. For the most part we are a bunch of shmoes who for some odd reason decided to modify a sensible family sedan, and found out that it can be improved significantly without too much money because there are factory parts which are corking the engine, etc. There are some knowledgeable people on this forum, engineers, experienced racers who have been doing it for years, etc who know how to sniff BS out pretty well and won't fall for the ebay $7 resistor mod that can "increase up to 20HP OMG!!!11!!!!"

I can tell from your posts steve that you are a knowledgeable person when it comes to parts development and implementation, and others can too. However your holier-than-thou attitude you had in your first post, and every post since then (in this thread anyhow), which provoked such responses.

I realize you were under the wrong impression about what exactly the Y-pipe replaced, and once you discovered what it actually replaced you understand why it gives the gains it does. But the manner in which you presented yourself was somewhat aloof, and you must understand that when you come across as both being aloof, and misinformed (because you didn't know that the y-pipe gives the gains that it does, not your fault) you are going to get jumped on by those who do know that the Y pipe gives such gains.

There is alot of second-hand, third-hand, and fourth-hand knowledge on this forum, and it can often get blown out of proportion and misrepresented. But if you stick around a while you will realize that while most of us have never worked on developing an IMSA GTP car, some of us actually have some knowledge which can be beneficial with regards to the modification or repair/maintenance of the Maxima. If you stick around a bit you will learn who the people are who actually know what they are talking about, and who those are who don't.

Welcome to the forum and I hope not just you but all people new to the forum stay long enough to both learn and teach something.

 

if you wont to talk choke points of on the maxima exhaust just look near the resonator on the b-pipe(5th gen). There is a huge portion of the pipe that has been crushed for some odd reason, fiting or sound tuning. Anyways it is obvious at that point to me that the maxima's exhaust needed some definate help. I put on a y-pipe a little less than a year ago and just recently passed emitions with absolutely no problems. My car has always felt more responsive and quicker since i installed the y-pipe. I see no draw backs with the y-pipe except that it might be a PITA to install.

 

Wow! Nealoc nice post. That was put very well. I agree completely. I sometimes tend to respond in kind to other peoples attitudes, but you took the time to think about it and reply rationally, and hopefully keep a new member around.

kudos.

 

That Dyno Sheet that you see here isn't made by the company, it was done by a Maxima Owner that wanted to document the performanced gained with their bought Y-pipe. There is no reason not to believe those numbers. The company had nothing to do with it.

Check out the link for yourself. http://www.motorvate.ca/mvp.php/504

 

Somebody ban this troll...

If he doesn't wanna believe us, why keep him around? Not only that, he is insulting everyone on this site's intellingence by calling us the "perfect consumer". What a d!ck. He'd be gone if I could help it...