300hp coupe?

[Ormand]

By the time that legal headers are available for these cars, the Honda Civic will be making 300hp. There are still no headers available for the 2006 Altima that won't set codes, as far as I know. The stock cat-back is pretty good, so replacing it isn't going to gain much, unless maybe you go with straight pipe. That leaves us with a short ram, an ECU reflash, and laughing gas!

[generic808]

By the time that legal headers are available for these cars, the Honda Civic will be making 300hp. There are still no headers available for the 2006 Altima that won't set codes, as far as I know. The stock cat-back is pretty good, so replacing it isn't going to gain much, unless maybe you go with straight pipe. That leaves us with a short ram, an ECU reflash, and laughing gas!

So basically, you're saying a cat-back won't help much? I beg to differ. Why in the world would great, reputable companies like Stillen and Nismo even make them? If you look under your car, there are restrictions in the piping. Just opening those areas up will have it's benefits. You're looking at a good 8-12 ponies there.

As far as headers, HotShot Headers was great, but I think they're out of business. It didn't set off any dummy lights in my past two cars whatsoever. If they do make one for our cars, I'd be one of the first to buy, no questions asked.

[generic808]

And I forgot to mention, you could always go with cams when they become available. Of course it'll be expensive, but hey, if you wanna crack 300, that's one of the options. Drivability and efficieny are compromised, but on a quest to 300, you gotta do what you gotta do

[shift_mikey]

thats just it, i'm looking for the 30hp without pulling cams or even removing a valve cover. I'm talking simple bolt ons and programming. I don't want to think about cams and injectors etc etc

Time will tell

[dldjros69]

why do cams mess up the driveability? How much Hp do the cams give? and what are the downfalls.

[redtop91]

Higher duration and lift camshafts make your car idle tremendously rough (you might notice this effect in OHV hot rods) and you are likely to stall out at lights if the lift is excessive. A mild street camshaft can see 16+ hp in most cases (with a proper tune for it of course) and the downfall, as in any power adder, is that it moves your powerband decidedly to the right. IE you lose some low end response for the top end power added.

[dldjros69]

So ur saying 16 hp for camshafts at 1200 bucks?? wow. How does the proper tune occur? Loss of acceleration and an add to top speed

[shift_mikey]

Cam's can add a tremendous amount of HP. Like redtop said, it changed when and how long the valves are open for. The most common result of a HIGHLY modified cam (racing/track) is poor idling characteristics, mainly due to overlap (poor compression/vacuum at low idle).

There are performance cam upgrades for most vehicles and the come in all different flavors. You'll see most labeling systems use "stage 1" "stage 2" etc etc. Stage 1 will usually consist of a super mild upgrade, with great driveability and no change to idle. Stage 2 is usually where some aftermarket valve springs and maybe retainers will be needed, and intake, header, and exhaust are recommended to benefit the cams breathing capabilities.

How to properly tune? Thats where you'd really need a dynometer and a programmable ECU to get the proper fuel curve to match the breathing characteristics of your engine

[generic808]

thats just it, i'm looking for the 30hp without pulling cams or even removing a valve cover. I'm talking simple bolt ons and programming. I don't want to think about cams and injectors etc etc

Time will tell

Hey Mikey, I got the answer for you and it only costs $9.99 plus shipping. It's a "stage III turbo chip" which gives you 35-45 HP and it installs in less than 30 minutes.

HAHAHAHAHA this one really cracks me up!! I can't imagine anyone falling for this and actually purchasing it! Whoever did, needs one of these --->

http://cgi.ebay.com/ebaymotors...wItem

So, I guess our quest for 300 is a simple plug and play device

[generic808]

This one is even better. It's a "custom electric centrifugal supercharger" which somehow gives a N/A motor a 2-3 psi boost! Boost in what?! But hey, they sell it on ebay so it must work, right? Dude, we get a 20% HP increase, so adding this will bump us up to 324 HP. Gee, I didn't know it was that easy! ____<---- insert sarcasm there I think I'm going to purchase 2 so I can be pumpin' 4-6 psi and my car will be pushin' 378 HP. Who needs a Skyline when you have 2 of these under your hood

Check it out: http://cgi.ebay.com/ebaymotors...wItem

OMG this one actually has 5 bidders!! http://cgi.ebay.com/ebaymotors...wItem

[rjdmmfl1]

Are you guys talking about whp? If so, according to the dyno charts from injen, the 3.5 altima is barely breaking 200 HP at the wheels...or maybe I'm reading the dyno wrong

[generic808]

Cars from the manufacturer are rated at BHP, or HP at the flywheel. WHP is the power that actually gets to the wheels, which is usually about 15-20% less than the BHP rating, when going through the drivetrain. As far as that dyno chart you're talking about is concerned, it's been discussed a little on here before. They used a CVT for that run and CVT's are very hard to dyno correctly.

[shift_mikey]

This one is even better. It's a "custom electric centrifugal supercharger" which somehow gives a N/A motor a 2-3 psi boost! Boost in what?! But hey, they sell it on ebay so it must work, right? Dude, we get a 20% HP increase, so adding this will bump us up to 324 HP. Gee, I didn't know it was that easy! ____<---- insert sarcasm there I think I'm going to purchase 2 so I can be pumpin' 4-6 psi and my car will be pushin' 378 HP. Who needs a Skyline when you have 2 of these under your hood

Check it out: http://cgi.ebay.com/ebaymotors...wItem

OMG this one actually has 5 bidders!! http://cgi.ebay.com/ebaymotors...wItem

ROTFLMFAO!!!!!!!!!!!!



man nothing like hooking up a 50CFM fan to a 300+ CFM motor! that would cause 10 times more restriction then it would flow!

And the chip! LOL why the hell does he advertise an IC with only 2 legs being used??? All you need is a resister! i'm willing to be that goes inline with either the MAP or MAT senser (fool ecu for colder or denser air)

[jwill3212000]

I knew if i rubbed the bottle long enough the genie would answer my wish. I have an 05 -2.5sl and with the CAI,cat-back, NGK irid for hot packs, a nice re-tune from my laptop, and some good synthetic; I can feel real HP and TQ gains in the seat of my pants. The 2.5 has the (ahhhh-sigh) breathing room for a turbo. It suites this car perfectly as apposed to the weight/balance and fuel consumption of the 3.5 altima. This is not your 69 Camaro we are talking about but a light weight tuner. The CVT is a nice transmission, but not for a sport tuner. A 6 speed or a snappy auto is the way to go. You dont see GM putting CVT's in their vettes. So letts get real, HP/TQ verses weight/balance and the RPM curve. The real problem is getting the ponies on the groung. Thats Nissans main weakness. A real good, snappy AT and strong limited slip is the answer. Kind of useless having 300+hp in a sharp right turn

[shift_mikey]

I have the CVT, and thats why i'm looking for not much more then 300hp, If i had the standard i'd consider reaching out for more

[II Knucklez II]

so with a CVT, it cant handle the power or what casue i was planning on doing alot to get the hp up around 350 or so?

[dldjros69]

im glad i dont have a cvt. i love how fast the car rips thru all 6 gears. Where are the upgrades, last word i got from nissan was Feburary.

[shift_mikey]

so with a CVT, it cant handle the power or what casue i was planning on doing alot to get the hp up around 350 or so?

Don't hold me to it. There is not a lot of data about towing/racing/increase hp with the CVT. Dont' forget, it is just a steel belt riding on 2 pulleys that change their size...... The biggest factors being, if the belt snaps, and the other, if the belt slips. I'm sure nissan engineered some sensor to prevent the belt from slipping, but overcoming it with power and breaking is my concern. Who knows, maybe its built to handle 400hp, but i'm not gonna be the first to find out!!!

[dldjros69]

Any body hear anything new about upgrades, im still sittin her in the dark!

[dldjros69]

http://mynissanparts.com/c-161-nissan-altima.aspx

eye candy

[generic808]

I gave Stillen a call last week and the guy I spoke with said there's a TON of stuff coming out for the 07-08 Altima's within the next 6 months. I'm assuming a set of headers is on it's way. Unfortunately, it probably won't be smog/emissions legal, but that won't stop me. We don't have smog testing here in Hawaii I still wish HotShot Headers was still around though. I loved the ceramic coated headers that I had on my old SE-R

[Ormand]

I knew if i rubbed the bottle long enough the genie would answer my wish. I have an 05 -2.5sl and with the CAI,cat-back, NGK irid for hot packs, a nice re-tune from my laptop, and some good synthetic; I can feel real HP and TQ gains in the seat of my pants. The 2.5 has the (ahhhh-sigh) breathing room for a turbo. It suites this car perfectly as apposed to the weight/balance and fuel consumption of the 3.5 altima. This is not your 69 Camaro we are talking about but a light weight tuner. The CVT is a nice transmission, but not for a sport tuner. A 6 speed or a snappy auto is the way to go. You dont see GM putting CVT's in their vettes. So letts get real, HP/TQ verses weight/balance and the RPM curve. The real problem is getting the ponies on the groung. Thats Nissans main weakness. A real good, snappy AT and strong limited slip is the answer. Kind of useless having 300+hp in a sharp right turn

Let's see, when was the last time GM put a 4 cyl in a Vette? Oh, yeah, NEVER! But they do have 300+hp, and they will turn at least as well as an Altima with wrong wheel drive. But they don't respond well to fart cans, and neon lights on the suspension. Nissan is developing the CVT, and their engineers like real performance, not "snappy", and they measure with calibrated instruments, not the seat of their pants. BUT- you are right that it hasn't been shown to work with high HP yet. But HP won't hurt the trans as quickly as torque- so those running a 4cyl can mod away, at least for while.

[SpdFreak]

By the time that legal headers are available for these cars, the Honda Civic will be making 300hp. There are still no headers available for the 2006 Altima that won't set codes, as far as I know. The stock cat-back is pretty good, so replacing it isn't going to gain much, unless maybe you go with straight pipe. That leaves us with a short ram, an ECU reflash, and laughing gas!

I haven't seen any headers or performance parts other than an aftemarket intake (which can't be worth much power if anything you may loose tq) and a stillen axle back (that's what it looked like from the pictures).

Is anyone going to try to set up their car with a full exhaust and a tune?

[dldjros69]

how in gods name r u gonna lose tq with an air intake????

[SpdFreak]

how in gods name r u gonna lose tq with an air intake????

I can't explain the scientifical reason but I can explain the theory.I'm going to use an intake manifold to explain the theory.The intake manifold on our cars have runners (tubes) where the air runs through to get to the heads of the engine where the valves sit. That runner was designed to flow a specific cfm to produce a certain effect. Too big of a runner will cause not enough velocity, and the air wont flow as well at low rpm's (where the tq is made) but will be good at high rpm's (where the hp is made). Too small or a runner (example: thin, cramped, lots of bends) might be flow less cfm's but will make more tq at lower rpm's at a trade off of loosing some higher end power, where flow isn't very good.

Same idea here with an intake.

Nissan designed the intake with a certain amount of resistance in flow to sacrifice a hp or two for the extra 2-3 lbs. of tq.

Now decide which one you would rather; loose some tq for some 6k rpm gains? Where do you spend most of your time? If it's on the street, you would probably rather the tq. Who revs to 6k on every shift? Probably not many of you.

If you would like a compromise do a GAB (getto air box).Heres a picture:

And the original link: http://www.cardomain.com/ride/442543/3
Modified by SpdFreak at 7:42 PM 10/8/2007

[dldjros69]

dont most air intakes claim sum hp gains and some tq gains.

whats a gab?

[shift_mikey]

spdfreak, your forgetting one thing.......

We are talking about modifying an air filter assembly, not an intake manifold. By a Short Ram Intake (or CAI), your just making more air available to the manifold, and from there runner size and shape is critical.

Besides, are you willing to argue with people that getting more air into the combustion chamber is going to produce less power on various portions of the RPM scale? If thats so, whats the point of installing aftermarket parts at all? especially intake manifolds, exhaust systems and camshafts?

[generic808]

more air + more fuel = more power

it's a simple equation.

[dldjros69]

[QUOTE=generic808]more air + more fuel = more power

it's a simple equation. [/QUOTE

thank you i thought i was losing my mind, thats the ticket why would anybody put aftermarket parts on

[SHIFT_2.5S]

so with a CVT, it cant handle the power or what casue i was planning on doing alot to get the hp up around 350 or so?

And what would that give you? Where could you possibly unleash 350 horses (or even close) if not at a track?