Going for 300hp at the crank

[jpfrk]

New member. Been lurking on this site for a month now. Decided to register.

So here is what I have. Just bought a brand new 2012 A/C 3.5 SR. Love it! Power is awsome, but want a bit more. Nothing crazy. Already considering the Y-pipe from Racingline. Then thinking of fabricating my own system after that using Magnaflow mufflers. Thinking of duel 2.5" after the y-pipe kit. Will be keeping the exhuast routing like stock OEM.

Intake will be a bolt in K&N probably.

Looking at the bully dog that everyone is talking about on this sight.

With just these 3 simple mods, Could I get into the 300+ range? I don't see why not.

This is my DD, So I don't want a major increase in exhaust note during casual driving. I like how the car is quiet during idle and casual driving. Hoping to keep it close as possible to that. I relize is will be a bit louder, but hoping not much. Im putting the car on a lift today just to start planning the exhaust system and seeing what type of fabrication is required on my end. The entire system will be BOLT ON into the car as well. NO PERMENANT MAJOR MODIFICATION WILL BE DONE!!! Want to keep the factory warrentee.

Thoughts?

[funkee]

300hp at the wheels? No. The stock engine delivers 270bhp, but considerably less power when it gets to the wheels. You would need a turbo before you can get 300whp.

You might be able to get a few ponies out of an intake - but not very much at all, perhaps 5-10 tops. The racingline y-pipe might get you another 10. The stock air flow system, from intake to exhaust is restrictive due to the catalytic converters. These cats cannot be removed or tampered with - legally; unless of course they fail.

If you eliminated all of the cats, and rebuilt the entire exhaust system, you might gain about 30 horsepower. Keep in mind that the after-market intakes are just as restrictive as the stock ones. They constrict back to the stock diameter around the MAF sensor. If you increase the diameter, the air speed slows down, which throws off the MAF sensor and might cause problems.

AEM is working on MAF tunes to correct this. So far there is nothing for the Altima. But perhaps with time. See: http://www.jegs.com/p/AEM-Induction/AEM ... 5/10002/-1

As far as tunes go; I recommend going with UpRev instead of BullyDog. BullyDog's tuner is rather limited in functionality; you will find many more gains with a custom UpRev tune.

[DJ_B_Easy]

Not sure you will hit 300 WHP with those modifications. The advertised 270 is at the crank. A few members have Dyno'ed their 3.5s and came in around 220-240 WHP if I remember correctly. There is a thread in this AC forum somewhere, use search and you should be able to find it.

Definitely go for the Y Pipe, best bang for the buck. K&N intake is nice, price is a little steep though. I got mine off eBay for around $200, do not pay retail price for it. I also considered a custom exhaust, but for the price in labor in my area buying a bolt on was cheaper in the long run. If you plan on DIY, go for it. No experience with the Bully Dog, cant help you there.

EDIT: Simultaneous post FTW Funkee

[Hussain]

No. If you have a stick shift you can do nitrous or turbo have 300 whp. With cvt transmission (automatic) the car will never make 300 whp. If it does, the transmission will blow shortly after (like the turbo cvt guys). I think you mixed up hp and "hp at the wheels". Big difference.

[jpfrk]

I should change the title of the thread.

Just go back from the lift bay. So I have a much clearer picture on what Im dealing with and how to properly unbolt everything correctly.

And I have the 6 speed manual.

I meant an increase to 300 at the CRANK. Not the wheels, my bad. I will not do a turbo. Don't want to open those can of worms. I do know whats involved when going forced induction. I built my own turbo system on my 1993 jeep wrangler inline 6 motor. So as for the fabrication part, I got that down no problem.

So Hussain is correct on the assumption of mis titled thread.

What size/diameter is the Y-pipe from racing line? Really want to go with 3" single into duel 2.5" at the mufflers.

[jpfrk]

Found possible muffler:
http://www.summitracing.com/parts/MPE-14267/
I might add a Flowmaster resonator prior to the muffler just to keep noises to a minumum.

[DJ_B_Easy]

I believe the Y Pipe is 2.25" diameter. Could be wrong though, email Joe he is a member here or check out their site for contact info.

[Hussain]

3" is probably too big... I have a custom exhaust and the guy at the shop was very knowledgeable and said not to go more then 2.5" (which is what I have).

the piping near the last cat (the Y-pipe) is sort of flat so I got 3" piping there a while ago (took off the cat, put it back on, blah blah blah) and even with that little section being 3", I have no low end power. I mean the car is ok for normal driving but when accelerating its pretty slow until maybe 3k RPM... by 4k rpm it pulls hard.

[jpfrk]

3" is probably too big... I have a custom exhaust and the guy at the shop was very knowledgeable and said not to go more then 2.5" (which is what I have).

the piping near the last cat (the Y-pipe) is sort of flat so I got 3" piping there a while ago (took off the cat, put it back on, blah blah blah) and even with that little section being 3", I have no low end power. I mean the car is ok for normal driving but when accelerating its pretty slow until maybe 3k RPM... by 4k rpm it pulls hard.

Well, I know that a 3" would be good for the upper rpm range. It makes sense on that note. guess I could step down to a 2.5, then up to a 3" for the muffler, then back down to a 2.5"

Its all in the flow of gasses under pressure.

[andyhenault]

I smell a fluid dynamics convo starting up...

[Ranga14]

As I recall Importroller has a 3.5 MT sedan putting down in the 290ish whp range but that's with most bolts on's you can get plus an uprev tune.

[el_blacky06]

time-for-a-tune-uprev-t542554.html

This should help answer your question concerning the hp. These are good gains just for bolt ons.

[jpfrk]

time-for-a-tune-uprev-t542554.html

This should help answer your question concerning the hp. These are good gains just for bolt ons.

Yeap, already read up on his thread last week. thanks though.

So the BD is around 330ish plus alot of emails and dealing with tech support more then likely to get the right tune.

Uprev might be between $500-$600 and requiring a competent tuning shop. And we all know that the average is 9 out of 10 are the wannabe's idiots out there that claim they can tune a car. (bad past experience in what i've seen and experience.)

Still waiting on racingline to get back with me on thier Y-pipe. Everything is dependent on those specs. Unless someone here with a y-pipe wouldn't mind crawling around with a tape measure and get back with me?!

[coupecrazy1232]

you want 300hp at the crank with only bolt ons then you bought the wrong car...sorry buddy but it will not make it there

[Ranga14]

you want 300hp at the crank with only bolt ons then you bought the wrong car...sorry buddy but it will not make it there

Considering it's 270 "at the crank" stock, I wouldn't consider it that difficult to hit 300 AT THE CRANK.

And it's already been shown that the car (proven dyno sheets) can make it to nearly 300 at the wheels. So please take your bias elsewhere.

[jpfrk]

you want 300hp at the crank with only bolt ons then you bought the wrong car...sorry buddy but it will not make it there

"checking sig"
"yeap"
"350z owner"

comment totally understood from said member.

Anything else you would like to add?
Or are you just upset that I have the exact same engine base you have, but can haul the grocieries home going fast and you barely have room for a shoe box in the back. I bought this platform for my reasons. If I wanted a pure sports car, I would have gone with a corvette. But I have other play toys in the garage for other things.

[DJ_B_Easy]

Guys, he used to own an AC too.

[Ranga14]

To be fair, the 08 Z has the HR engine, although the 07+ altimas do share a few similarities with the HR it can still put out a bit more HP than ours due to the strong engine design in "stock" form. But yes, since at the base they are the same engine, ours can be upgraded just as easily.

[coupecrazy1232]

you want 300hp at the crank with only bolt ons then you bought the wrong car...sorry buddy but it will not make it there

"checking sig"
"yeap"
"350z owner"

comment totally understood from said member.

Anything else you would like to add?
Or are you just upset that I have the exact same engine base you have, but can haul the grocieries home going fast and you barely have room for a shoe box in the back. I bought this platform for my reasons. If I wanted a pure sports car, I would have gone with a corvette. But I have other play toys in the garage for other things.

maybe you should know cars a little more before u spout off...i have a vq35HR not the vq35de, dual throttle body and oh yeah im ALREADY AT 306 at the crank...STOCK...btw like stated i had a AC and know more about that car then you do as a current owner so please take your grocery getting car and leave it parked in the garage

you want 300hp at the crank with only bolt ons then you bought the wrong car...sorry buddy but it will not make it there

Considering it's 270 "at the crank" stock, I wouldn't consider it that difficult to hit 300 AT THE CRANK.

And it's already been shown that the car (proven dyno sheets) can make it to nearly 300 at the wheels. So please take your bias elsewhere.

please tell me what bolt ons are gonna give you the 80 horses to get you to 300whp, please do tell....YOU CANT

[jpfrk]

To be fair, the 08 Z has the HR engine, although the 07+ altimas do share a few similarities with the HR it can still put out a bit more HP than ours due to the strong engine design in "stock" form. But yes, since at the base they are the same engine, ours can be upgraded just as easily.

Didn't know that. the dealership lied to me. Oh well. .

So, It would take the best bolt on mods and the right tune JUST to get our engines to stock Z performance level ( in theory).

And racingline did get back with me. it is a 2.5" diameter over all. So: Run the y-pipe, step up to a 3" all the way to the muffler I posted earlier, back down to 2.5" leaving muffler, to a nice set of tips.

If its too loud for my liking, install a resonator in the long 3" piece. I have a feeling it may be a bit loud. I know the magnaflow on my jeep is loud as ever going down the hwy, when I start hitting speeds around 75+(3000RPM ish)

[jpfrk]

snip. . .

cry. .

whin. .

im better then you . .

please tell me what bolt ons are gonna give you the 80 horses to get you to 300whp, please do tell....YOU CANT

go away

[coupecrazy1232]

hahahaha you have 12 post u fawking noob!!!! i know 90% of these guys personally so YOU go away! lmao

[jpfrk]

hahahaha you have 12 post u fawking noob!!!! i know 90% of these guys personally so YOU go away! lmao

Well, im not going to go away. Just here to get some tech and learn from people who do know these machines inside and out. If I came off as too brash towards you, don't take it personally. Not new to forumns. Yeas, I am a newb to the modern nissan platform. The last time I worked on a nissan/datsun, was back in 1998-1999. That was a 1978 Datsun 280Z. I installed a cam, intake, exhaust, oil cooler w/high volumn oil pump and such. Guess what: I DID ALL THE WORK MYSELF. (still kicking my self for getting rid of it )

So if you ask me if I know my way around a car, I DO! But all that past work was the old school type of stuff. Im trying to learn this new generation of cars.

I don't know your past experience, so I cannot judge. But let me ask you this; a solid question with out ridicule: What type of tools do you have in your garage? I don't know about you, but I have spent the past 15 years aquiring the tools of my passion. I am a person that does As much work as possible in my garage.

Maybe your a professional metal fabricator, and engine tuner? I don't know, therefore, I cannot judge. I just took your first post in MY THREAD as a attack. But im not taking it serious. So if we can, Can I please put this thread back on track. I did mention, I will be doing some of my own welding and fabrication into this. I believe I can bring something solid on the plate for this forumn to digest.

thank you.

And I decided to go with the K&N cold air kit. Good prices on Ebay.

[Ranga14]

please tell me what bolt ons are gonna give you the 80 horses to get you to 300whp, please do tell....YOU CANT

Look up Importroller's thread on his uprev tune and his associated dyno sheets with his bolt ons that make nearly 300whp. If you've been around as "long" and as "much" as you say you have then you'd already know this. It's common knowledge. I just don't appreciate your elitist attitude. It provides a stained image on here, especially to new users like jpfrk.

[el_blacky06]

I normally don't get into anyones business but I expect for long time members to act more mature than this.
Just keep the negative comments elsewhere.

As Ranga14 stated, these are proven dyno gains which is the reason why I posted the link for everyone to see.

[Hussain]

BOTH sides need to calm down...

I see what brett is saying about the 300 whp thing. assuming a car had the same drivetrain loss as his altima had stock, it would have to have 360 hp stock to have the same WHP... 270 hp crank, 220 WHP thats about a 19% loss. 360 multiplied by .8148 and we get 293 whp... so its crazy to see that with just an intake, exhaust, y-pipe, and a tune a car with 270 hp stock can push the same WHP of a car with about 360 HP.... thats almost like a supercharger or low boost turbo set-up... pretty insane. almost too good to be true.

but then again, I hit a 13.912 1/4 mile by just unbolting my exhaust and some people had a hard time believing the car could go that fast with such little mods. so I understand how our cars can become faster then it seems possible. I also understand how someone can be skeptical about a car pretty much gaining 90 HP from some bolt ons.

so both sides can just calm down now

[coupecrazy1232]

you want 300hp at the crank with only bolt ons then you bought the wrong car...sorry buddy but it will not make it there

Please tell me where i said anything negative at all right here...

you want 300hp at the crank with only bolt ons then you bought the wrong car...sorry buddy but it will not make it there

"checking sig"
"yeap"
"350z owner"

comment totally understood from said member.

Anything else you would like to add?
Or are you just upset that I have the exact same engine base you have, but can haul the grocieries home going fast and you barely have room for a shoe box in the back. I bought this platform for my reasons. If I wanted a pure sports car, I would have gone with a corvette. But I have other play toys in the garage for other things.

this pissed me off, he assumes that due to me currently driving a Z i know nothing about an AC which is greatly incorrect. i could cares less about how long ive been here, the fact is he was in the wrong for assuming i didnt know what i was talking about

[DJ_B_Easy]

I like turtles.

[coupecrazy1232]

I like guys named DJBeasy who like turtles

Edited for secrecy

[DJ_B_Easy]

No government names!