300hp coupe?

[shift_mikey]

So who's working on cracking the difference between the coupe and the 350Z? From what i understand, some things were detuned, such as the intake manifold, exhaust, etc. But anybody figure out any programmers to alter ECU software and crank out more horsies?

[doi]

jk jk lol but i would like to know as well.

[AltiCoupeDriver]

Roughly how much more horse power could you expect to get just by tweaking the ECU?

[shift_mikey]

Thats the beauty of variable valve timing and ignition timing. Supposedly there is a programmer for the QX56 that juices 30+ hp, and its just a piggy back computer

[AltiCoupeDriver]

That would be pretty awesome, but I think it could be a while before we see anything like that.

[squik]

When I still had my Audi I had it done, I was able to get about 30 to 40 extra HP out of it, of course it had a turbo which was getting more boost to so that helped.

[AltiCoupeDriver]

Nice, are there really any dangers to getting this done? Also about how much did they charge?

[dldjros69]

Lets keep this thread going! Come on guys. I have a 2.5 ac i wonder how much more hp and tq you could get out of it.

[Goon]

Ha, I would definitely like to know if it's possible.

[shift_mikey]

I'm waiting to see if someone puts out a super charger kit for it. I think turbo would be difficult on a sideways V6.

My BIGGEST concern with additional horsepower is the CVT transmission. I really don't know what it can handle. I might just leave well enough alone, if i had the standard shift i'd be more inclined to play

[dldjros69]

http://www.turbo-kits.com/altima_turbo_kits.html

02 & up Nissan Altima 2.5L & 3.5L Turbo Kit

$6,295

Stage II

I want ONE NOW

[generic808]

Lets keep this thread going! Come on guys. I have a 2.5 ac i wonder how much more hp and tq you could get out of it.

Honestly, not very much. If you're lucky, maybe 20HP and that's not going turbo or SC. If you're going to spend that much for a turbo set up, you might as well dump your car and buy a 3.5 because it would be cheaper and you'll still have more HP. No matter what you decide to do with your car, whether it be turbo, supercharge, NOS or whatever, you will not get to the stock 3.5 power. The amount you would have to invest for an extra 100 ponies wouldn't be worth it.

[SHIFT_COUPE]

Honestly, not very much. If you're lucky, maybe 20HP and that's not going turbo or SC. If you're going to spend that much for a turbo set up, you might as well dump your car and buy a 3.5 because it would be cheaper and you'll still have more HP. No matter what you decide to do with your car, whether it be turbo, supercharge, NOS or whatever, you will not get to the stock 3.5 power. The amount you would have to invest for an extra 100 ponies wouldn't be worth it.

[Ormand]

With a turbo, you could probably get the 2.5 to somewhere around 300hp. The 3.5 is so tight under the hood, putting even a CAI on it is going to be tough. The engines in the RWD cars are mounted different, so they have better intake and exhaust set up, much easier to make power with a 350Z, or an Infiniti. The "easy" way to get power out of the 3.5 in an Altima is with Nitrous. Some folks have used it on previous gens, it's just a matter of time until somebody puts it on a 4th gen sedan, or a coupe. THEN we will find out what breaks!!!

[LongBeachCoupe]

I dont see how you could just add a turbo and increase HP by 58%... Just doesnt seem logical without blowing the engine up..

As for gassing the engine, thats on a burst basis, not continual... it also needs a good 1/4 of your trunk, and will take TENS of thousands of miles off the life of the engine...

(this is all from my investment bankers understanding of engines, i really have no hands on experience to speak of, just common sense, as a result, i hope im right and im not making a fool of myself!)

[Kasper08]

I dont see how you could just add a turbo and increase HP by 58%... Just doesnt seem logical without blowing the engine up..

As for gassing the engine, thats on a burst basis, not continual... it also needs a good 1/4 of your trunk, and will take TENS of thousands of miles off the life of the engine...

(this is all from my investment bankers understanding of engines, i really have no hands on experience to speak of, just common sense, as a result, i hope im right and im not making a fool of myself!)

hey your an investment banker ????

[LongBeachCoupe]

I hope i didnt make a mistake by posting that.. please dont ask me for financial advise because its not my business... but yes.. if you want to discuss.. email me.

[Ormand]

I dont see how you could just add a turbo and increase HP by 58%... Just doesnt seem logical without blowing the engine up..

As for gassing the engine, thats on a burst basis, not continual... it also needs a good 1/4 of your trunk, and will take TENS of thousands of miles off the life of the engine...

(this is all from my investment bankers understanding of engines, i really have no hands on experience to speak of, just common sense, as a result, i hope im right and im not making a fool of myself!)

Don't ask for my advice about investment banking. Common sense might tell you that. My years of experience with engines has shown MANY instances when a turbo adds that kind of power. The turbo Buicks (like the GN) can easily be tweaked to add more than 50%, to an engine that was powerful to start with. No internal changes needed. And they will run like that for thousands and thousands of miles. Nitrous is similar. And like any use of power, the more you use it, the more wear on the engine. The nitrous takes up as much space as a twelve pack of 12oz cans. Not a problem, unless you have a hybrid.If you check the other Altima forum (NissanClub.com) there is a dyno thread that includes a test of a turbo 2.5, with max power of 270hp, without alky, and on only about 7 lbs of boost. Some alky injection and a little more boost would easily get the 300.
Modified by Ormand at 3:51 PM 9/27/2007

[AltiCoupeDriver]

So why spend thousands of dollars on a turbo when they could've just spent that much and gotten a 3.5, seems pointless to me.

[shift_mikey]

this topic was started with the 3.5 in mind. I was discussing who's working on getting more juice out of the 3.5 to bring it up to the G and Z level. Its the same displacement, and some different manifolds. I was curious if anybody thought about using the Z's fuel/timing curve and if it would bring out the horses. I'm not talking about 100+hp gains with major upgrades. Looking for the $1K solution for 30 more HP

[dldjros69]

The only thing i could think of would be Jet Power Chips, that cost about 400 dollars maybe less. I know the intake and exhaust will give you close to 30hp.

[LongBeachCoupe]

Ormand, can you send me a link? alky, 7lbs boost... Chinese to me! Also who do i have the notion in my head that adding these types of things take life off the engine, was it once like that and they have gotten better? or am i just blatantly wrong?

[generic808]

With a turbo, you could probably get the 2.5 to somewhere around 300hp. The 3.5 is so tight under the hood, putting even a CAI on it is going to be tough. The engines in the RWD cars are mounted different, so they have better intake and exhaust set up, much easier to make power with a 350Z, or an Infiniti. The "easy" way to get power out of the 3.5 in an Altima is with Nitrous. Some folks have used it on previous gens, it's just a matter of time until somebody puts it on a 4th gen sedan, or a coupe. THEN we will find out what breaks!!!

Yeah, it is not impossible to get the 2.5L to that level, but come on now, how practical would it be? A turbo set-up is not a simple bolt-on/plug and play deal. A turbo set up to get you that much HP will cost too much, not to mention the labor costs (if you're not mechanically inclined to self install). Like everyone, including myself has said, why spend that much to get so many horses when all you need is the VQ? You will not have to worry about longevity, warranty, or reliablity issues. And not to mention, the 3.5 comes with so many more options for the $4K extra. You get better wheels/tires/mirrors/suspension/etc etc etc.

[mcheddadi]

A 300hp mod on the coupe is gonna be easy.

Stillen's SEMA Altima Coupe will feature new products such as a 4 piece body kit, rear wing, big brakes, Super Charger, Exhaust, Intake, springs, etc.

Fox Marketing will develop a wide body kit, twin turbo kit [oh S|-|IT! ] , exhaust, coilovers, etc. for the car.

-With the twin turbo a 350+hp is more than in reach and even 400hp wouldn't be too far fetched (but you better have VDC to manage all that power!).

-With the new intakes and exhaust 300hp from the 270hp is almost possible.

-With the supercharger, 300hp is certain!

Anyways, At SEMA I think everyone who owns a 3.5SE is going to go nuts

[Ormand]

yeah, I know how expensive it would be to add a turbo. But people do it all the time. The 270 hp Altima (that's at the wheels) is mentioned here:http://www.nissanclub.com/foru....html It's maybe the fourth dyno test down, belong to doc25398. Before you get to it, you'll see a turbo 3.5 that put almost 350 the wheels. But it's an older Alti, they had more room for mods under the hood.The 3.5 in the 4th gen is limited by lack of clearance. A warm air intake might get you 10 hp, and a CAI would be lot more trouble, for another hp or two. You could get a few from changing the ECU program, but the ECU on the Infinit is set up to match the better intake/exhaust on that car, and the same is true for the 350Z.As to engine life- driving hard wears things faster than driving like Ralph Nader. But most of us are not going to use full power very often, or for very long. So we may not get 100,000 miles out of an engine. But 90,000 is good enough for me! Guys with Buick Grand Nationals tune them to 400 hp, or more, then take them past 100,000 miles without a rebuild. So it can be done, with some cars.

[LongBeachCoupe]

what is VQ?Also a turbo is what has a "blow-off" valve, where you hear a "ssssssttttt" when it switches right?

Also, the 4k for a v6 wasnt a problem... it is the insurance... it would cost me 1500 more a year for the v6

[generic808]

A 300hp mod on the coupe is gonna be easy.

Stillen's SEMA Altima Coupe will feature new products such as a 4 piece body kit, rear wing, big brakes, Super Charger, Exhaust, Intake, springs, etc.

Just with an intake, headers and exhaust, the VQ's should be in the upper 200's. Maybe with an ECU upgrade, if one becomes available, the Altima will crack that 300 mark.

I talked to Stillen yesterday about shipping cost to Hawaii for my springs, and also asked if a strut tower brace is in the works. They said within the next six months it'll be out, along with a BUNCH of other goodies. Let's cross our fingers for a set of headers, SOON!!

[generic808]

what is VQ?Also a turbo is what has a "blow-off" valve, where you hear a "ssssssttttt" when it switches right?

Also, the 4k for a v6 wasnt a problem... it is the insurance... it would cost me 1500 more a year for the v6

VQ is short for VQ35DE, the engine code

$1500 more per year!! Dude, make the switch to AIG! haha j/k

And yes, turbo'd motors are the ones which use a BOV, or blow-off valves. It's just used to relieve excess turbo pressure.

[shift_mikey]

I'm not so sure on bolt on upgrades (I/H/E) bringing it to the 290hp realm. I think a combination of intake, header, exhaust, AND ecu program should get to 300HP. Of course, we are also talking around $1500+ for 30HP gains

[generic808]

I'm not so sure on bolt on upgrades (I/H/E) bringing it to the 290hp realm. I think a combination of intake, header, exhaust, AND ecu program should get to 300HP. Of course, we are also talking around $1500+ for 30HP gains

I'm pretty sure a I/H/E combo should get you around 290 or so. Here's my little break down if it's worth anything.

A good set of headers: 10-15 HPCat-back exhaust: 8-12 HPShort ram intake: 5-7 HP

Even on the low side, you'll be close to that 290 mark. Now I'm talking about Stillen headers, Stillen cat-back, and an INJEN intake. I'm pretty sure you'll be hovering around 290 HP, give or take a few.

And I'd pay $1500 for 30 ponies any day!! I have an Eaton M62 supercharger on my truck which boots the motor up 40 horses and I get an additional 3psi boost from installing a smaller pulley. Of course adding an SC would cost you $4000+. So, cost per horse is way more than worth it if you can get the 30 HP for $1500.