Injen Intake= Crash and burn......i can't see the price jumping up to retail of $700 anytime soon once the feedback from the dyno's spread. They are going to have enough trouble selling them for $500.

 

^^ exactly their intake should be $250-300 dollars like the rest of the low gain intakes.
Customers bought these because they expected a 14whp gain, now those who were foolish to believe it want to change their reasoning to shiney pipes and sound...........
yawn**** you could have bought another for $200 cheaper, admit you got scammed. Injen never once came on here and said your car must be and "stay" completely stock to produce these gains, looking at the group buy list the majority of the people already have exhaust, if they knew this were the case Injen wouldn't have had half of the sales.
Since you all are so loyal try asking Injen for a modest $200 rebate and see where they tell you to shove it............

 

 

If people bought this expecting 14 whp ON TOP of HFCs and exhaust...then they are retarded.

 

i left my house at like 3:30 and this thread was barely 2 pages..now its 8..wow

 

ok.. IMHO. there is now way you can get 14 hp more on a intake more after getting great results out of HFC/ exhaust combo.

It doesn't work that way. They will compliment each other to a certain point as far as total gain on HP but getting 14 whp out of exhaust and HFC combo and adding CAI will not gain net another 14 whp. Our ECU can only do so much without any re-flash

Im sure when someone decides to do another independent dyno with no other mods, they should get more than 4 whp.

again, only my 2 cents. I wasn't present at the time Injen did dyno nor i won't claim i know everything about the HR motor. I do know the basic concept of aftermarket parts and what to expect on each upgrade.

I know dieseldoug's dyno lost 5+
HP even with exhaust/hfc upgrade with a short ram on Technosquare's dynoyet. Gaining 4hp should mean something.

https://www.myg37.com/forums/engine-drivetrain-and-forced-induction/180187-ecu-tune-finally-done.html


More info at www.howstuffworks.com

 

I will be the first to admit I have never thought highly of intakes (just look at my previous posts). I have always doubted what effectiveness there would be for an intake mod on an engine that was already implemented with an efficient intake system.

That being said. The dyno test tells us nothing. Sure she got a baseline, but it was not stock. how could Injen predict what other mods work on the car and what doesn't? absurd. EVERY aftermarktet manufacturer dynos a baseline STOCK to their product. Did anyone take into effect that the a/f ratio is thrown waay off stock that the ecu is either retarding timing or that it is adjusting?

My 350Z ran great with a plenum spacer...but ran like crap after headers, exhaust, etc. When Tadashi (technosquare) took my plugs out, he found I was running very lean, the car started to pull timing, and in many case my engine was detonating. after an ECU flash, the car ran great and stronger than before.

Until I see a baseline dyno with an Injen...I will hold off on my 'I Told You So..' card. If you are familiar with modding (especially with current cars todays with learning ecus and efficient engines), you can't expect a claimed baseline gain and compare it to when you have already thrown in HFC (which is a HUGE choke point already) and an exhaust. it just doesn't happen. Sport Compact Car did a dyno comparo with a Nismo Z (equiped with exhaust, cams, headers, intake) with a stock Z and only read 10whp more. They blamed it on the 91 octane gas but really it's the ECU.

People who are spewing venom need to ask themselves this: 'If nissan made an ECU for a car that runs at the parameters to the fullest extent of the right air and fuel ratio of which the engine was built...then how would an aftermarket part affect it? Would some random part that nissan did not account for magically make the engine run better?'

C'mon guys....this is silly....

 

Round one is almost done I think 8 pages.
Here is round two:

My husband and I were discussing this issue with the CAI's, and the dyno results. My husband remineded me that he has no idea where they are taking the air from because theres only a little hole in the bottoim of the pocket. And any other air thats going to be pulled inside would have to be hot air from the engine. It actually doesn't make any sense. If we go back and look at our original system we are pulling air through the grill into the air system. We also noticed after taking a ride, the car is starting to run a little warmer, how we noticed that is the car feels a little sluggish. So we came into the house and had a cup of coffee and discussed it once more. Made a few phone calls to some friends that we know that are running pro stock cars and they also agree that any air that we are going to get in there is going to be hot. Earlier today my husband called up Injen and Jerry didn't have a real answer so my husband asked him what he would think if we took out the baffles and that directly in front of the air filter, and he said that would surely help. The picture below shows the small hole thats inside the pocket to bring air into the system, and the only other air to be brought in is from the engine compartment which is hot. After some careful thought, we came up with a solution. Stay tuned. Thursday you will see what we did. And they don't involve the injens. Hey listen everyone, our cars need air to run.

 

THANK YOU, an intelligent post.

Yes, the stock intakes create more power as you go faster. This is confirmed by Nissan documentation, which I would be MORE than happy to provide.


Yes, on a dyno, the CAI may make more whp. In the real world, on the fwy, the stock intakes are getting more and more air rammed into them.

To show how drastic this effect is, try taking one of those turbine fans, and blowing DIRECTLY into the inlets for the intakes, and see how much whp you gain.

Now compare the volume/pressure of that air vs the volume/pressure you'd get at 80mph.


I did this on my personal car for sh*ts and giggles, and gained almost 30whp blowing into the air inlet. (not a G)

Pay for my dyno and gas, and I'd be more than happy to reproduce. (again, not a G)

 

This is very interesting... or better yet... FUNNY.

Let me tell you something...

I have a 07 G sedan and yes I have full cat-back and HFC WITH my Injen intake...

Guess what? I didn't make 15whp on top of my exhaust setup!!!!!!

But better yet, I got 7whp and I was dead happy about it and I believe that's because I have a smaller piping size for my exhaust (2.25 inches instead of 2.5 like the G37 ones).


By now, you'd probably understand this, but let me tell you again... YOU WILL NEVER MAKE 15WHP ON TOP OF YOUR CURRENT AIR MODS!!! Especially when you have a full cat-back w/ HFC!!!

You gain all that 14~15whp when your car does not have any other breathing mods.

Also, the dyno numbers all depends on weather condition, altitude, temperatures, type of dyno.. and etc etc.



At this point, I'd suggest you go ahead and get your car tuned... as you're probably running reeeeeeeeeaaaaaaaaaaaalllly lean with all your breathing mods.

Yeah, that's all I have to add to this thread. lol

 

i would really like to see one that is all stock then.

 

+1

 

To OP:

Can you post up the whole graph + A&F ratio graph + the correction factor for the run, please?

Thanks

 

Most marketing companies will use the lowest run of the baseline, and the highest with the mod, and call that a large gain.

Almost everyone out there does it.

Regardless, gains are gains. If the gain isn't there... then that'll speak for itself.

 

Did not get the A&F ratio. If you woulkd like to send me some money then I will get the A&F ratio for you. They charge extra for it.