Injen cold air intake

[Infantry1327]

I am getting ready to throw a new intake system on my 08 A/C 3.5 and I am really interested in the Injen Cold Air Intake. Has anyone heard anything about them or heard of any better intake systems.

[mcheddadi]

I heard the Injen sounds real nice

[Infantry1327]

dope thats what I was looking for, thanks

[LinkNuc]

Just so you know, there are no COLD air intakes for the coupe, just warm air and a quasi short ram is coming from k&N for the 2.5 and there is a homemade ram from one of our dudes....you will most likely not see any HP gains but a increase on sound will be there..if some one tells you it "feels like it pulls harder" they are lying

[smmehdiz]

..if some one tells you it "feels like it pulls harder" they are lying

it really doesnt, but the sound will make you think it is lol, its just a head game unfortunately

but the injen does sound amazing

[Infantry1327]

Yea that threw me off to, because the stillen website is selling what they call a Injen Technology SP Series Cold Air Intake Systems for the 08 altima coupe. lol

http://www.stillen.com/product...LTIMA

[dldjros69]

I think an intake provides a little more power, along with sound.

There is an increase in throttle response when you have an intake/exhaust.

[adidas2go]

The Injen does increase throttle response and sound however, the 3.5 a/c is considerably slower with the injen installed. The stock system with with a K&N drop in filter is your best upgrade to you intake system, as far as bolt on mods go.

[LongBeachCoupe]

why slower??

[mcheddadi]

The Injen does increase throttle response and sound however, the 3.5 a/c is considerably slower with the injen installed. The stock system with with a K&N drop in filter is your best upgrade to you intake system, as far as bolt on mods go.

I think Blake made a typo.

injen makes the coupe faster not slower

[LinkNuc]

Be honest, your coupe isn't going to be any faster with the intake, not one bit. But you may like the sound, the throttle response, ehhhh not really

[l33th41]

I think Blake made a typo.

injen makes the coupe faster not slower

I didn't think an intake (especially a short ram) would make any vehicle "considerably" faster OR slower.

[adidas2go]

Simply put, the gains from cold air/more restriction from the stock system are greater than the gains from hot air/less restriction from the injen system.

[PHENOMenalVinyl]

wat changes in the sound?? is it deeper/loouder wat

[mcheddadi]

Simply put, the gains from cold air/more restriction from the stock system are greater than the gains from hot air/less restriction from the injen system.

dyno? proof?

When you're riding, the air next to the intake is the same temperature as the air next to the stock intake. Stock will never be "cooler" than the injen one. Wth!

You weird facts spreader you.

I didn't think an intake (especially a short ram) would make any vehicle "considerably" faster OR slower.

In cold places (like here in Canada during most of the year except summer) intakes gives your butt dyno quite the workout.

wat changes in the sound?? is it deeper/loouder wat

Sound is SEX. Buy one and you'll see why everyone is buying intakes

[joe21]

Quote, originally posted by adidas2go » Simply put, the gains from cold air/more restriction from the stock system are greater than the gains from hot air/less restriction from the injen system.

If this is true, it really sucks that a Injen would put something out there that decreases horsepower when it's supposed to be a performance piece.

AND, don't you think this would have been good info to have before I bought your Injen intake Blake.

[Cali 2 Balti G]

The truth is that there are many products out there that offer no gain in performance, a minimal gain in performance, or a decrease in performance. The products are made because there is a a demand for them - simple. I think this is also why most performance products have no dyno charts in their advertisments. For example, They claim to increase airflow - which is not necesarrily the same as increasing horsepower.

Also in the case of the AC - I think there is the assumption that - all of the performance products for the G35 and Z will be made for the AC (or even fit the AC as is) and further that they will produce the same or similiar results. Due to the difference in orientation of the drivetrain FWD vs RWD, tuning etc. there ARE significant differences in the applications.

[mcheddadi]

true.

Here's a dyno chart for the Injen intake

[Altimus_Maximus]

Have any of you guys actually inspected the "cold-air 'scoop'" that works with the stock intake (on the 3.5)?

The tiny pipe is indeed meant to funnel cold(er) air hitting the front of your grill into the intake. The fact that the entire intake is enclosed in a plastic box prevents engine air from entering and ensures that new air coming in is outside air funnelled through the grill.

So, I can see what Blake means when he says that you are going to have a higher psi from denser, colder air when using the stock intake over the INJEN. BUT, if you look close at the route the outside air must make to get through the "scoop" and into the box, it's a tortured tiny passage, practically a straw of a opening. That would mean the stock intake is having to suck the air in with all its might to even get it. That, it would seem, would lower psi.

IMHO, the less restrictive nature of the INJEN intake trumps the gain from the "coldness" of the stock setup. While the INJEN may not be a "ram air" intake that pushes the air forcefully enough to boost psi, the ease that the air flows into the INJEN makes up for it being warmer engine air when considering the vacuum-like restriction of the stock set-up.

ALSO, factor in that even though engine bay air is warmer than outside air, our car still has plenty of flow throughout the engine bay. Colder air will indeed enter the engine bay from underneath the car, and the hot air will naturally rise and get sucked out the vents at the top of the engine bay by the negative pressure created by the wind flow over the windshield.

I'd be willing to concede it's a tossup or a tie which is actually better for performance. But I doubt the INJEN makes our car "considerably slower," if slower at all.

Ideally, the best intake possible for an increase in NA performance would be a cold-air intake that puts the filter head where the battery currently sits and seals off the engine bay with a K&N-like divider that snugs up to the hood. Then cold air from under the car will have an easy time of reaching the intake.

So somebody should do that: transfer the battery to the trunk and fab an intake that stuffs the filter head right in the spot where the plate that holds the battery up currently sits.

[LinkNuc]

butt dyno for just an intake, cold gettin to your brain up there in the great north? J/k

[adidas2go]

Alright guys heres my thing.

I just sold my Injen to Joe. After driving with the stock intake system again, It is DEFINITALY faster with the stock system over the Injen. There is a straight road by my house that I run whenever I get a new upgrade to see If I have a change in performance. I run from the end of the road to a gravel driveway at the other. With no human errors involved, in D, I get to 100mph from this point A to point B with the Injen. However, with the stock system I get to 115 in the same scenario. My point is based directly on the cold air being sucked into the system. The stock system brings in cold air from the grill and routes it through sealed piping to the throttle body. Nowhere for hot air to begin to come in. However, with the Injen its sucked straight hot air off the transmission. I mean honestly, the transmission is producing massive amounts of heat during acceleration. So it stands to reason that the stock system would be faster.

As for the Dyno numbers. Companies get Dyno numbers from closed enviornments. They cool a dyno room down to about 45 degree and also run dynos that read high. They can doctor dyno numbers any way they want to.

Joe, I didnt know or feel any of this until I actually drove the car. The day you came to pick up the intake, I had just taken it off, so I hadn't even driven if. If your really that displeased with it, I will give you your money back. However, the quality, sound, and aesthetic values alone are well worth the $150 price you got it from me for.

In retrospect guys, Its really about what your looking for. I liked the Injen personally, faster or not, If I wasn't getting a turbo, I would have kept it. Its a nice bolt on and has many positive qualities over the stock system. Im sorry if anyone took it the wrong way when I stated this information earlier, this is just what I believe based on driving the car with and without the system myself. Maybe someone out there only has and Injen intake on their 3.5 and can belly up against a stock 3.5. See who wins

[D-Roll]

Just so you know, there are no COLD air intakes for the coupe, just warm air and a quasi short ram is coming from k&N for the 2.5 and there is a homemade ram from one of our dudes....you will most likely not see any HP gains but a increase on sound will be there..if some one tells you it "feels like it pulls harder" they are lying

Talkin about me and my lil mod....It did make a difference and Im not just saying that cuz I made it

[joe21]

Joe, I didnt know or feel any of this until I actually drove the car. The day you came to pick up the intake, I had just taken it off, so I hadn't even driven if. If your really that displeased with it, I will give you your money back. However, the quality, sound, and aesthetic values alone are well worth the $150 price you got it from me for.

Blake, I was totally kidding . I know you are a straight forward guy. I love the intake even if it does take away a little horsepower because the sound and look make up for it.

Blake, do you think you are going to keep your Borla because I'm getting ready to get the Nismo from Leeparts?

[mcheddadi]

It doesn't take away hp or torque...

If dyno charts can't be trusted anymore, I wonder what can!

[troy15]

now after reading all of your opinions im alil confused and torn between weather getting the Injen intake is the smart move..i def wudnt want to make the car slower..at all..however i am lookn for my a/c to make some noise. I am also considering the nismo exhaust, wud the exhaust system take car of the sound without replacing the stock intake wit the injen

[adidas2go]

Haha cool Joe, good to hear. Also, I'm not getting rid of the Borla until I test fit another exhaust on and see if I lose or gain anything. I would go ahead and get the nismo because my car isn't going to be done until the 23rd or so. Im going to leave it on and see if it created good numbers with 2.75 inch. 3-3 1/2 would be best for V6 Turbo, but we shall see.

Troy, It isn't a bad upgrade, I just noticed my car to be faster with the stock system over the Injen. Like I said though. If given the oppurtunity, I would have kept the system hands down. Its just to nice of build quality and aestetics to give up over a little drop in performance. Plus a minor fabrication, like the pictures above, and you could have yourself a hell of a system

[08altima35]

i don't disagree with anyones opinion on this, but until someone other than the manufacturer dyno's with and without the injen i'd say everything stated is probably just speculation. the throttle repsonse is much greater with the injen meaning your throttle body is taking in more air more easily regardless of if it's warm or cold. it's a toss up either way and just has to be proven or disproven. someone throw there car with and without the injen on a dyno. maybe kyle would give a discount on a couple dyno pulls to prove this one.

[adidas2go]

Yea I agree, but temperature is going to be the biggest player in this game for sure. The trottle body is only going to take in so much volume. The system is taking in all it really can with the stock system. I mean honestly a bigger filter and tube doesn't mean the engine is going to take that much more air. You can take the whole intake system off and leave an open throttle body, leaving the largest amount of air volume intake possible. However, I bet is doesn't go any faster because the engine is only going to allow so much air, and Its going to be hot air at that. Lets do some dyno runs and find out

[kyle@stillen]

I feel obligated to jump in here...

Alright guys heres my thing.

I just sold my Injen to Joe. After driving with the stock intake system again, It is DEFINITALY faster with the stock system over the Injen. There is a straight road by my house that I run whenever I get a new upgrade to see If I have a change in performance. I run from the end of the road to a gravel driveway at the other. With no human errors involved, in D, I get to 100mph from this point A to point B with the Injen. However, with the stock system I get to 115 in the same scenario. My point is based directly on the cold air being sucked into the system. The stock system brings in cold air from the grill and routes it through sealed piping to the throttle body. Nowhere for hot air to begin to come in. However, with the Injen its sucked straight hot air off the transmission. I mean honestly, the transmission is producing massive amounts of heat during acceleration. So it stands to reason that the stock system would be faster.

Blake, I understand your testing procedures however there is a lot to consider...What were the weather conditions on these days? Was it the same temperature? What was the street condition like? clean one day possibly dirty the next? Did you have any differences in weight?

The reason I ask is because 15 miles per hour is a MAJOR difference in speed. Consider that difference in a 1/4 mile comparison...15 MPH is HUUUUUUGE. In my opinion I don't think an intake could be responsible for 15 MPH.

As for the Dyno numbers. Companies get Dyno numbers from closed enviornments. They cool a dyno room down to about 45 degree and also run dynos that read high. They can doctor dyno numbers any way they want to.

You've seen our dyno...It sits outside on the hot asphalt...Yes, we have fans in front of the car but they run allll the time no matter what we're testing. Whether it's our parts or factory parts. Despite whatever conspiracy theory thoughts you might have...They don't exist.

In retrospect guys, Its really about what your looking for. I liked the Injen personally, faster or not, If I wasn't getting a turbo, I would have kept it. Its a nice bolt on and has many positive qualities over the stock system. Im sorry if anyone took it the wrong way when I stated this information earlier, this is just what I believe based on driving the car with and without the system myself. Maybe someone out there only has and Injen intake on their 3.5 and can belly up against a stock 3.5. See who wins

At the end of the day an aftermarket air intake is doing quite a bit more than just pulling cold air.

You also need to consider airflow. Air, does not like to travel over the accordion tubes that car manufacturers put in to the intake tracts. They do this for ease of installation, less vibration/drone, allowance for complete engine movement during normal operation. However, they do not do it for improved airflow.

Also, with an aftermarket air intake system you get a larger, more efficient air filter element. Our testing has shown that the K&N filters are superior to any other filter element on the market but Injen and others definitely offer a great product.

In reality, an properly developed air intake does make power. Will it offer as big of a gain as say an exhaust? no...It won't...There is not as much restriction to remove. However, it will make power. It will provide you with a superior filter. It will offer a great sound. It will offer a great look.

There are definitely some companies out there who don't care about the power gains and just make stuff up. But, to generalize and say that all automotive tuners doctor dyno numbers or set up special test scenarios is a pretty ridiculous statement to make.

My recommendation...Go with a company you know and trust. If it sounds too good to be true...It probably is. You won't get an increase of 10 MPG with an intake. You won't drop 2 seconds in the 1/4 mile. You won't gain 30 horsepower. However, you will gain some power, you will feel the gain, you will have a more efficient air filter and you will have a great sound. Also, you have a great showpiece for every time you pop the hood.

[adidas2go]

Haha I knew this would piss someone off, but in all honestly they are just theories. I don't go to every company and see them dyno everything. However, I have personally been a part of borla's dyno process and they did just that. Also with my last turbo car, my eclipse, the shop that did all the dyno testing was set up in that EXACT same perspective. I'm not saying every company does this, I was refering to certain speculatory companies that pony up 55 hp and 33mpg from drop in mods, cough *turbonator* cough . Sure it might just be them, but I dont know. I didn't blame STILLEN for any of this, or Injen. I know you guys do true testing, I have full faith in STILLEN. But I found it kind of hard to believe, when I called Injen and asked them where they got those dyno numbers from, they had used a 3.5 CVT. Knowing what we know about CVT and dyno's, just found it kinda shady

As for the speed difference, It doesn't make sense to gain 15 mph in the quarter, and there could have been many factors that played in, but this is what I saw, I could be crazy. Don't be mad at me Kyle, I posted this when I was on the aircraft carrier, working 14 hours a day for 21 days straight, I was a bit pissed off at the world