Y pipe post your impression here:
I'm sure it might take a fill up or two before you can get a good idea or MPG change due to you are probably pushing the car a little harder to see difference of power before and after. Once you do get a good idea after your trial period is over please do let us know.
If you had to guess would you say it would go down due to increased HP or go up to do easier exhaling?
If you had to guess would you say it would go down due to increased HP or go up to do easier exhaling?
I'm not sure, but I will let you know when I have some idea of what's going on.
Senior Member
Joined: Sep 2008
Posts: 1,192
From: CT
Lol ik what u mean. I drive aggressive to so w.e u get after this tank should be what I get aswell. Thanx man
Senior Member
Joined: Sep 2008
Posts: 1,192
From: CT
Supporting Maxima.org Member
Joined: Oct 2005
Posts: 620
From: Brooklyn NY
Dont forget for those for are resetting their ECU's, the car's we revert back to factory spec within a couple of days. Not sure of the time span, but on my 05 max, I remember I had to keep resetting it.
So basically the moral here is exhaust will almost always make you lose low end power and gain high end? The reason I say this is because I've never seen an aftermarket exhuast thats smaller, or the same size as stock...theyre always larger.
I did explain the loss of torque. It's in the link I posted.
Wider pipes, if the exhaust gas volume is insufficient (which it is, at low RPMs), allow the exhaust to cool, expand, and stagnate, reducing exhaust gas velocity. The lower exhaust gas velocity, the less scavenging effect there is on the combustion chamber, which reduces power.
An wider exhaust that has low backpressure and high exhaust gas velocity at high RPMs will have low backpressure and slow exhaust gas velocity at low RPMs, and sacrifice low-end power for high-end power.
An narrower exhaust that has low backpressure and high exhaust gas velocity at low RPMs will have high exhaust gas velocity but lots of backpressure at high RPMs, sacrificing high-end power for low-end power.
It's not that complicated. If you read some of the links, or did a cursory google search of "backpressure", you'd find it.
Exhaust gas velocity is not some bull**** myth circulated by Racingline to sell a Y-pipe to maxima owners.
Backpressure, however, is a bull**** myth created by ricers who don't know what "scavenging" means and were trying to figure out why their 4" fartcan exhausts were losing low-RPM power. You don't need backpressure at all. You don't need a "source of backpressure" in your exhaust system.
Wider pipes, if the exhaust gas volume is insufficient (which it is, at low RPMs), allow the exhaust to cool, expand, and stagnate, reducing exhaust gas velocity. The lower exhaust gas velocity, the less scavenging effect there is on the combustion chamber, which reduces power.
An wider exhaust that has low backpressure and high exhaust gas velocity at high RPMs will have low backpressure and slow exhaust gas velocity at low RPMs, and sacrifice low-end power for high-end power.
An narrower exhaust that has low backpressure and high exhaust gas velocity at low RPMs will have high exhaust gas velocity but lots of backpressure at high RPMs, sacrificing high-end power for low-end power.
It's not that complicated. If you read some of the links, or did a cursory google search of "backpressure", you'd find it.
Exhaust gas velocity is not some bull**** myth circulated by Racingline to sell a Y-pipe to maxima owners.
Backpressure, however, is a bull**** myth created by ricers who don't know what "scavenging" means and were trying to figure out why their 4" fartcan exhausts were losing low-RPM power. You don't need backpressure at all. You don't need a "source of backpressure" in your exhaust system.
Dont forget for those for are resetting their ECU's, the car's we revert back to factory spec within a couple of days. Not sure of the time span, but on my 05 max, I remember I had to keep resetting it.
So basically the moral here is exhaust will almost always make you lose low end power and gain high end? The reason I say this is because I've never seen an aftermarket exhuast thats smaller, or the same size as stock...theyre always larger.
So basically the moral here is exhaust will almost always make you lose low end power and gain high end? The reason I say this is because I've never seen an aftermarket exhuast thats smaller, or the same size as stock...theyre always larger.
Dyno run today with and without the "Y" pipe.
Well today I spent 3 hours at Chucks Speed Shop here in Phoenix, AZ and we did several pulls (over 15) where we tried everything and I now know the CVT won't let you run any type of accurate DYNO run...
We tried first manually shifting and holding in 3rd gear as that ratio is 1.11 however once we hit over 5500 RPM it would shift into 4th gear EVERY TIME!
We turned off VDT, we left it on, we also ran in regular CVT mode which only allowed 6400 RPM pulls and the CVT would keep changing it's ratios thus never allowing us to create accurate back to back runs.
Don't believe anyone, until I see the "secret" on how to DYNO a CVT the DYNO runs that Taketa did and the others are all crap. I could've posted some garbage pulls tonight and said hey look a -- HP increase but it would've been a complete fabrication of the truth.
That said it was still fun, the "Y" pipe is of high quality, nice welds, and I like the increase in sound (throaty) although that is extremely minor and only is noticeable at around 4K RPM or higher.
Yes I would purchase it again, this is my second purchase from RacingLine and they are great!
I have no loss in low end, fact is my 0-60 times improved.
Here are some pictures sorry for the quality this was my camera phone:
Well today I spent 3 hours at Chucks Speed Shop here in Phoenix, AZ and we did several pulls (over 15) where we tried everything and I now know the CVT won't let you run any type of accurate DYNO run...
We tried first manually shifting and holding in 3rd gear as that ratio is 1.11 however once we hit over 5500 RPM it would shift into 4th gear EVERY TIME!
We turned off VDT, we left it on, we also ran in regular CVT mode which only allowed 6400 RPM pulls and the CVT would keep changing it's ratios thus never allowing us to create accurate back to back runs.
Don't believe anyone, until I see the "secret" on how to DYNO a CVT the DYNO runs that Taketa did and the others are all crap. I could've posted some garbage pulls tonight and said hey look a -- HP increase but it would've been a complete fabrication of the truth.
That said it was still fun, the "Y" pipe is of high quality, nice welds, and I like the increase in sound (throaty) although that is extremely minor and only is noticeable at around 4K RPM or higher.
Yes I would purchase it again, this is my second purchase from RacingLine and they are great!
I have no loss in low end, fact is my 0-60 times improved.
Here are some pictures sorry for the quality this was my camera phone:
Last edited by MaxLoverAz; Apr 7, 2010 at 07:00 PM. Reason: resized pictures
For the Dyno runs ( you are right the CVT is unreliable), we based ours off of the 6spd 07+ Altima and measured the pipes to ensure there were no differences, which there are not. the pipes are near identical to the Altima pipes minus the flanges which are all different.
Although the Maxima produces more power than the Altima in stock form, for all intensive purposes it breathes through the same Y pipe as the Altima and our altima Dyno showed a 14hp gain to the wheels. Since the maxima makes more power using the same motor , it only serves as logical that it would see the same or better gains. Street testing did prove the theory as well as a few members here posting....The car is noticeably faster with the Ypipe, and comparably faster to the Altima before and after, thus our reasoning for the "dyno proven gains". I would assume Takeda used the same approach for their intake
Although the Maxima produces more power than the Altima in stock form, for all intensive purposes it breathes through the same Y pipe as the Altima and our altima Dyno showed a 14hp gain to the wheels. Since the maxima makes more power using the same motor , it only serves as logical that it would see the same or better gains. Street testing did prove the theory as well as a few members here posting....The car is noticeably faster with the Ypipe, and comparably faster to the Altima before and after, thus our reasoning for the "dyno proven gains". I would assume Takeda used the same approach for their intake
Last edited by TAZ; Apr 7, 2010 at 12:12 PM.
Junior Member
Joined: Jan 2010
Posts: 50
From: SF Bay Area
MAXLOVERAZ... did you use the Copper RTV gasket sealer? doesn't look like it in the pics. if not... did you get any leaks? going to install mine this weekend hopefully and was wondering if the sealer is necessary or if i can just use new crush gaskets only. Thanks!
Junior Member
Joined: Jan 2010
Posts: 25
So I got the Y-pipe installed and got a chance to drive it around too. I have to say that the video Racingline posted showing off the Y-pipe was a little misleading in that I don't feel my stock Maxima sounds the same. There is a throatier exhaust sound but not as much as I thought after viewer their video. The weight difference between the stock part is very noticeable, it's much lighter. Can't say much about the speed/performance as I haven't had a good chance to really let it loose. Overall, I am fairly happy with the purchase, just would have hoped it was louder. With that being said, does anybody know if I can purchase the Stillen or any other manufacture mid section pipe individually then use the stock mufflers. I have a feeling opening up that mid section/resonator combined with the Y-pipe will produce a nice exhaust note.
No leaks, the RTV sealer is only to hold the crush washer in place since the "Y" pipe doesn't have the inner ring to hold the washer in place while bolting up the unit. I installed two new crush gaskets and a new rear gasket.
For the Dyno runs ( you are right the CVT is unreliable), we based ours off of the 6spd 07+ Altima and measured the pipes to ensure there were no differences, which there are not. the pipes are near identical to the Altima pipes minus the flanges which are all different.
Although the Maxima produces more power than the Altima in stock form, for all intensive purposes it breathes through the same Y pipe as the Altima and our altima Dyno showed a 14hp gain to the wheels. Since the maxima makes more power using the same motor , it only serves as logical that it would see the same or better gains. Street testing did prove the theory as well as a few members here posting....The car is noticeably faster with the Ypipe, and comparably faster to the Altima before and after, thus our reasoning for the "dyno proven gains". I would assume Takeda used the same approach for their intake
Although the Maxima produces more power than the Altima in stock form, for all intensive purposes it breathes through the same Y pipe as the Altima and our altima Dyno showed a 14hp gain to the wheels. Since the maxima makes more power using the same motor , it only serves as logical that it would see the same or better gains. Street testing did prove the theory as well as a few members here posting....The car is noticeably faster with the Ypipe, and comparably faster to the Altima before and after, thus our reasoning for the "dyno proven gains". I would assume Takeda used the same approach for their intake
I'm still getting no change... This tank has been a tad better (i.e. 22-24 mpg) but that's most likely because I've been taking it easy on the gas pedal this week.
Senior Member
Joined: Sep 2008
Posts: 1,192
From: CT
Any ORG Members have video of their cars w/the RL Y-pipe installed now? Would like to compare it to that of RL's website, and to maybe better understand the new growl as noted in several of your posts.
Thanks guys for all the 411 in this thread!
Thanks guys for all the 411 in this thread!
Junior Member
Joined: Apr 2010
Posts: 71
From: Long Island NY
ok so Im a newbie to this forum and have some questions. I am def intersted in getting new exhaust for my 09 max. It seems like the overall feedback from this y pipe is positive. so what about the rear section of the exhaust? do u guys recommend stock mufflers and tips or ones from stillen or others. Also im assuming if i get this y pipe then the cat would stay stock since a full exhaust would would rule out getting the y pipe.? I appreciate the help and suggestions!!
Member
Joined: Dec 2009
Posts: 145
From: Burgettstown, PA
ok so Im a newbie to this forum and have some questions. I am def intersted in getting new exhaust for my 09 max. It seems like the overall feedback from this y pipe is positive. so what about the rear section of the exhaust? do u guys recommend stock mufflers and tips or ones from stillen or others. Also im assuming if i get this y pipe then the cat would stay stock since a full exhaust would would rule out getting the y pipe.? I appreciate the help and suggestions!!
Senior Member
Joined: Sep 2008
Posts: 1,192
From: CT
To my knowledge there isn't a full exhaust available at this time. You have to buy the Y-pipe and the cat-back seperately if you want the whole exhaust from the manifolds back. I have the Racingline Y and the Stillen Cat-back and I am very happy with it. If you go this route buy them both and install them at the same time, I had to drop my Stillen cat-back to get the Y-pipe on.
Member
Joined: Dec 2009
Posts: 145
From: Burgettstown, PA
Junior Member
Joined: Apr 2010
Posts: 71
From: Long Island NY
Thanks for the info GEAR HEAD. Ok so Im def looking into getting this y pipe. Anyone else have input on gettin the cat back from stillen? Im not sure about it cuz I saw the dilemma that Kam had to go through w/ it. It seems like one from Borla would be the way to go, but not even sure if they're gonna produce one. appreciate all the input and suggestions!
It was really strange. I had had my Stillen cat-back on for 2 weeks before I put the Y-pipe on. Either the cat-back or the Y-pipe were 1" too long (or a combination of both), and I couldn't get the Y-pipe on even with the cat-back adjusted as far back as I could get it. I had a heck of a time getting the Y-pipe on until I dropped the exhaust. Then I even had to make some modifications to the middle hanger on the rear Y-pipe so that I could move the entire exhaust back get the Y-pipe to fit. I had to cut away some of the steel and the rubber grommet so that the hanger could be moved back further. On the up-side the exhaust tips stick out a little further and looks a lot better IMO.
Member
Joined: Dec 2009
Posts: 145
From: Burgettstown, PA
Not all at the hangers, just the hanger on the rear Y-pipe. It was a PITA. The way my luck is I'm pretty sure I was the only one to have that problem. I probably had the only manufacturing defect. But like I said the tips stick out further and look nicer so it worked out in the end. From the side of the car you can see them sticking out just a little bit now, but not past the center of the bumper.
Senior Member
Joined: Apr 2004
Posts: 1,756
From: Fontana, CA
all new nissans/infiniti's have learning computers that adapt to any modifications added on. a 10-15 mile drive and usually 2-3 startups later, the car will adjust for the improved airflow.
no need to reset ECU...unless your're in a hurry.
(turbo's and any other type of FI requires professional tuning)
no need to reset ECU...unless your're in a hurry.
(turbo's and any other type of FI requires professional tuning)
Senior Member
Joined: Oct 2009
Posts: 202
5ltr, that what I thought too. The ECU will adjust to something as simple as a new CAI. I can't seem to get the ECU to reset so I'm going to just let it ride.......if it was a gain like my cobra of 22hp I did a re-tune, but 6hp not so much.
Senior Member
Joined: Apr 2004
Posts: 1,756
From: Fontana, CA
correct
in ur Cobra's situation,you're FI, so if change out your pullies to push more boost, the ECU is too stupid to know that it needs to flow more fuel, so a new tune is required.
if you don't mind me asking, did you have a KB on your terminator? Procharger? back in my street racing days i used to race against my buddies KB 03 Cobra against my bottled SS and man, i couldn't keep up in the high end.
in ur Cobra's situation,you're FI, so if change out your pullies to push more boost, the ECU is too stupid to know that it needs to flow more fuel, so a new tune is required.
if you don't mind me asking, did you have a KB on your terminator? Procharger? back in my street racing days i used to race against my buddies KB 03 Cobra against my bottled SS and man, i couldn't keep up in the high end.
