What is a safe increase in hp altima 2.5 '08?

[Nlghtmare]

So I'm new here and purchased my car a little under a year ago, but I haven't done anything extreme to it at all.

I don't wanna annoy a member of the forum that I've been contacting directly anymore so I'm finally posting here!

I've looked at a bunch of threads already so please don't tell me to do a search.. and I've been researching websites for months now. I just want the truth etc.

So. What it comes down to is I hear that my 2.5 coupe can't go past 250 without it getting "dangerous". I just want to know how fast can I increase the HP in my car w/ and w/o it getting "dangerous" and where to buy the performance parts.

Oh yea.. and if anyone has any cool interior ideas for my car too that would be nice! It's pretty much all stock aside from some poorly installed neons (I'm switching to LEDS lol.)

[RobPaulson]

hhmmm unless your planning on a turbo you dont need to worry about putting 'too much' power through that thing . . . i dont think it would be very realistic to hit +65hp without going BIG and spending way too much . . .

[Nlghtmare]

+65 is more than enough really. I'm just a nub and wouldn't know how to get it. In other words, what to actually purchase and stick in my Altima. I've got different suggestions coming from dozens of different people and friends.

[dangeris]

If you want to go faster, do it in a controlled environment, like a race track.

And welcome to the forums!

You should go to Carlisle this May and meet the rest of the group!

[Nlghtmare]

yea thats where my friends and I will do our racing. =] we'll stay safe.

Thanks a lot =]!

I'd love to come. Let's hope I get some nice enough mods and have money left over to come meet everyone haha.

I just read your mod list btw. Pretty sweeeet!I gotta get my interior better looking >.<!!!!!!

[RobPaulson]

+65 is more than enough really. I'm just a nub and wouldn't know how to get it. In other words, what to actually purchase and stick in my Altima. I've got different suggestions coming from dozens of different people and friends.

no offense dude, but if you wanted speed why did buy a 2.5? Your gona spend thousands of dollars to make it even comparable to the 3.5, then your going to have to sell your first born to afford any power beyond that LOL

my suggestion, unless your willing to drop like 8-10k into your car, stick to the bolt-ons like an intake, suspension mods (RSB, springs, endlinks etc), exhaust, y-pipe (when its released), pulleys, and even after AAALLLLL that, your MIGHT have netted +20-25hp . . . IF that . . .

although i'm no expert and i ownn a 3.5, so my estimations might be off up there . . .can anyone confirm my semi-educated assumptions lol?

[Nlghtmare]

few things. didn't know exactly what I wanted at the time, and my car choices were large. I needed a car. I'm a sophomore in college, and I couldn't really afford anything too spectacular. I live in dirty jersey and gas prices were outrageous when I purchased the car so the 2.5 was amazing to me (and still is.)

The argument that can be brought up is "So trade it in for a 3.5." Problem is I was rear ended by a Honda Pilot eight weeks ago and I'd rather not go down that route. This baby is my first car and I was looking forward to having some fun with it =].

But yea. Can anyone confirm what Rob said? Does anyone have other insight? Let's see what we can get out this. I'm looking forward to unbiased opinions.

Edit: Actually. Why not go for a turbo?

[RobPaulson]

But yea. Can anyone confirm what Rob said? Does anyone have other insight? Let's see what we can get out this. I'm looking forward to unbiased opinions.

Edit: Actually. Why not go for a turbo?

like i said i wasnt trying to be rude or nothin, just wanted to be straight with you from what i know. and i understand eveyone has their reasons for buying the engine they did, everyones situation is different

even just browsing stillens website, adding up the diff rated hp gains from bolt-ons . . . your not lookin at that much serious power. although, you will ABSOLUTELY feel a difference after installing them. it will be quick and exciting, but far from what most enthusiasts call 'fast', hell, the 3.5 isnt even that fast in that respect . . . needs a decent amount of addons to make it really exciting =) (or maybe i'm just way too used to it at this point haha)

check out stillen and racingline . . . they have decently accurate HP gains posted, accurate enough for you to get a general idea. you'll see it adds up quick

turbo parts alone are going to run in the thousands, not to mention the ridic hours required for install . . . if your a college student and money is a factor, that may not be the best idea hehe

ok sorry i'll stop posting now lol . . . ssssooooo bored @ work haha

[Nlghtmare]

yea yea I hear you. =] I understand.

yea.. just adding up a few things already wow.it'll take a little to save up but it's cool. I'm looking into body kits at the same time so this is gonna be a hard one.

lol it's all good. I'm bored at work too lmao.

[JDRosenberg07]

First Welcom to NICO..

As far as mods go for the 2.5 Rob is right there isnt really anything that will put you in a higher power bracket.

The Y-pipe is only for the 3.5 because its a V6 and it connects the headers at a single point and connects those to the exhaust. However Stillen is working on some headers for the 2.5 and they said they have seen gains of about 10hp or so. It just hasnt been released yet. The will hopefully be around $500 or so.

If your looking for cheaper bolt-ons for power def go with an I/H/E (intake/headers/exhaust) upgrade. I have a 2.5 and i can say from personal experience that changing out my intake and exhaust i can take a stock 2.5...lol I think im pushin close to 200hp with my exhaust and intake. Im waiting on funds to get my car dynoed.

The 2.5 exhaust is VERRRRRYYYY restricted going down to about 1"-1.5" at one point. Opening this up to about a 2.25" will do wonders. you can probably see about a 15hp increase or so just from that. My exhaust cost me $730 shipped and installed.

An intake will def sound great but it will only add maybe 6hp max. I have the Injen intake and thats what their dyno said for it. My intake was about $250 and installed it myself.

As you can see these upgrades can still be a little expensive but they do have results when you add them all up.

[toxik]

buy an intake and some other crap if you want. in your situation last thing you need is a turbo, remember you still want the car to be an everyday driver.... again its a 4 banger, and a fwd car. Exterior will give u twice the attention and actually make your car stand out rather than some performance parts that no one will see.

[RobPaulson]

+1

buy an intake and some other crap if you want. in your situation last thing you need is a turbo, remember you still want the car to be an everyday driver.... again its a 4 banger, and a fwd car. Exterior will give u twice the attention and actually make your car stand out rather than some performance parts that no one will see.

+1

If i had gotten a 2.5, i would have done cosmetics first (kit leds headlights etc)

Since I got the 3.5, I am avoiding cosmetics (only done front lip and some vinyls), and concentrating on performance now

[AkAd3MiKs]

first off, how much hp are you trying to shoot for? If youre trying for 250, try getting what they said, intake, headers, and an exhuast system (2.25" piping). Instead of going single in dual out, try going single in single out for a better flow. Other bolt-ons that will make a huge difference are cam gears and intake manifolds. You could look up skunk2 for intake manifolds and cam gears. Also edelbrock makes some really good intake manifolds. STR cam gears are really good too. If they dont have for our cars, try talking to them about making some. I have a 2.5 too and got a lot of plans for the whole car. But I wont start on the engine until I get the cosmetics done first. I can also recommend getting some MSD systems, these will increase hp and your rev will be much much better and quicker. If 250 isnt good enough for you, then brother its time to do some surgery to your engine.

Peace and goodluck

[mcheddadi]

the only way for some good power it to do an engine swap, a turbo or supercharger, or do a cylinder bore with camshaft timing and open headers.

if you got max skills the turbo or supercharger will be the cheapest, then the engine swap then the fully built engine. if you got no skills, then its min 5000$ for buying a complete kit and going from there its adds up fast if you need to have a shop tune it and install it. you might be interested in trading up for a 2008 3.5SE for a lot less money than all those options. OR, I forgot but you can add nitrous or meth injection to get 250HP for sure. thats cheap too

[Hussain]

the only way to get a lot of power for cheap is by going nitrous lol but i wouldnt do that..... just get a full exhaust system, headers, intake, and tune it and that should keep you happy.....

[michaelthepsycho]

Just do the upgrades that are standardized by NICO as they usally aren't MAJOR wallet-denters. Because it is a first car, you shouldn't be dumping too much money into it. Turbo would be the last option but that would require major engine building and transmission protection. After I'm done with the A/c I might move up to the Z or G or maybe even cross over to the dark side: BMW lol.

[Hussain]

can't go wrong with BMW or benz, all my friends have BMW and benz but my family has always had a warm fuzzy feeling about Nissan lol my friend just gota 335i sedan, very fast and smooth

[michaelthepsycho]

I actually hate Benz with zeal because of their stupid emblem and unwillingness to round up their corners. Boxy cars... Me don't like. I have to admit they are damn fast though, can't deny that. Ultimate driving machines .

[mcheddadi]

lol I dislike mercedes for not having proper manuals like the models they sell in europe , and for bmw...well I hate Idrive with a passion but otherwise they are nice but way overpriced

[Hussain]

ya i agree about being over priced, my dad's E500 was $70,000 MSRP plus tax and license fees in 2003. my car was $25,000 there is no way that his benz is $45,000 better then my car. nice cars but best to get them a couple years old, used.

[JDRosenberg07]

A 335i is gonna be my next car once i save up enough money...lol i had a 3 series before and even tho it was 15 years old when i got it, it still ran great.

335i has 300hp and 300tq from 1400-5400RPM!! thats insane! and its sexy as hell...lol

[blacky_s13]

just for ****s and giggles...is it possible to slap on a se-r ecu on the 2.5 Altima and get a hp gain?

[brokendan]

^ i think from everything i searched, the general consensus is no

[mcheddadi]

stillen is going to release an ecu mod for the 2.5 don't know when but it'll eventually happen

[brokendan]

yea im trying to wait for that and then there is also that power pup. but im not sure what all it does for performance past removing the gov and increasing rev range. and also while we are on the subject of hp increasing. http://cgi.ebay.com/ebaymotors...ories would this work except for needing a custom dp and intercooler pipes?

[JDRosenberg07]

The turbo itself will work on the QR25. There are actually a couple turbos that will fit. the only problem is there is no complete kit that will fit our 2.5 A/C. You can get one to work you just have to have someone make you a custom kit.

[brokendan]

which parts would need to be custom

[mcheddadi]

which parts would need to be custom

headers and piping

[dldjros69]

stillen is going to release an ecu mod for the 2.5 don't know when but it'll eventually happen

really?

what would the price range be?Possible gains?

tia

[brokendan]

ha ok basically everything lol thnks. i guess i was confused bc i kept hearin the header would bolt up but wouldnt fit cuz of the oil pan