So the AEM basically is a 200.00 under the hood appearance mod? I was about to buy the AEM but now I'm wondering if I should go for the Injen....does the Injen sound as nice as the AEM at 4K and over?

 

I was going to get the NISMO intake even though I know it is an AEM. Now, because of your very informative post, I am going with INJEN.

Thanks.

 

Injen it is...

Thanks for the DYNO!!!!!!!!!!

 

if these are legit runs, I applaud the effort. But does anybody else feel that <25 minutes between runs is questionable?

Look at the last AEM run (11:30pm) and the last Injen run (11:55pm)... only 25 minutes between. And by the recount, there were 3 minutes (by stopwatch) between each run. So, 11:55pm -6 minutes places the first Injen run at 11:49pm at the latest.

So, we're talking, at best, 19 minutes to completely remove the AEM intake, then install the Injen intake to be ready for another run... all while working around a very hot motor. I don't think so. I know where the AEM filter winds up and if you could both get it out and the Injen installed in under 19 minutes, you've made a pact with the devil.

That aside, even if you pulled the swap in 19 minutes, the Injen intake does sit just behind the grill and the AEM does sit near the driver wheelwheel. So fans directly on the front of the car will artificially inflate the Injen numbers.

My bet is that neither one makes much power...

 

McDuck,

We have done the installs before and he mentioned the bumper being off. If you have the bumper off and if you installed one before it does help. But yah 19 minutes is fast Pit crew time!

I feel the heatshield for the INJEN is a pain in the butt. Thats what actually slowed us down. But you can prep the car by removing the strut bar before the dyno and having the bumper out helps too.

AEM and INJEN are placed differently, that is also why I posted the NISMO numbers as I know they have done a lot of dyno testing as well..

I wish we could simulate real road conditions and driving

 

The post that calls into question the placement of the fan and potential Injen advantage is valid. However; the point is "the point". In real world conditions there is "wind" blowing over the filter. On a Dyno the fan helps "simulate this". If the Injen performed better because of this factor , it still perfoemed better.
The reason why is a question that the manufaturer should ask and maybe learn from. Maybe the AEM would perform on par if placed in a more exposed frontal position. So, I would n't cry "foul" quite so quickly. The methods employed seem more objective than most.

 

Exactly! The addition of the fan simulates driving conditions. I would be hesitant in believing the dynos if the fan "wasn't" there. I think the results here are very legit.

I am sorry if this rubs people the wrong way, but many many people here cry and cry for dynos before their purchase. And then cry even more when someone doesn't fulfill a promise to do a dyno. Next, someone posts a dyno of an exhaust. Instead of a thank you, he gets flamed becaue the dynos were done 6 months apart. Now some dyno's all three intakes, all on the same day, on the same dyno, and people are still crying!! I think some are stuck in la la land, where bolt on mods actually produce the numbers claimed by manufacturers. I learned early on, that if you cut those claims in half, your expecations will be much more realistic.

Thank you situr80. You and you buddy spent the time to compare. Thanks!

 

Though I don't think this would change the result "pecking order" it may change the deltas in HP /TQ seen. It is probably more "real-world-like" if dyno runs used to quantify either "intake" or "FI + intercooler" upgrades have the hood "closed" to account fro the "real" heat-soaking effects. The AEM perfmormance may actually be more effected with the hood closed. As we all know cool air is best for power and , getting the intake air from outside the engine compartment should yield better results.

If you did the runs with hood closed , don't sweat this post.

 

I thought this post would be more informative than controversial. But the numbers speak for themselves.

1) The times on the graph is wrong by the way, it should be am instead of pm.

2) We installed the intakes right after each group of runs (3 for each system) and started the next group of runs. We also took off the bumper prior to strapping the car on the dyno to make switching intake system a lot easier.

3) Yes, three runs for stock, three runs for AEM, and three runs for Injen.

4) We did not remove the battery cables.

5) The fan that was used is a like a 5 foot diameter industrial fan. It was placed approximately 5-6 feet in front of the car. I've seen people mentioning how Injen has the advantage because of filter placement, but the bumper was completely off so both intakes had ample amount of air supply.

The Nismo intake is exactly the same as the AEM and overpriced, and I believe they use the same hp figures stated by AEM.

 

If you are going to question my mechanical ability then at least ask first. I've been modifying cars for 10 years I have work as a mechanic for 3 years. Plus, I preassembled what I could before the dyno runs where finished. For the Injen though I didnt install the heatshield because I'm planning to get headers later on.

I don't see the big deal with installing an intake system. It's just clamps and hoses that need to be assembled and tightened. I have a harder time putting together an IKEA dresser than this.

Also, both AEM and Injen should have had the same amount of air flowing to the filter because...the bumper was off. And if neither made power, then please explain why.

 

don't sweat it situr. people are going to doubt and try to discount any dyno posted here. It happens almost every time. I won't post mine on this forum anymore.

 

So............. the question now is:

Where's the best place to buy the Injen CAI?

 

I'm satisfied, don't want the get the wrong impression I was just curious as I have done some dyno testing on the 350Z and G35 with the INJEN intake.

Just was planning on doing something similar. Was waiting for that K&N Typhoon if it ever came out to do the test but I think I've given up waiting for it lol.

Thanks again and I hope I didn't come across as trying to slam you just a curious person that enjoys seeing results

Zya!

 

situr80...

Sorry... missed the part about the bumper removal...

Still... the 19 minute change is pretty quick. Either way... 1 HP or 4 HP... neither one is much to crow about. Unless you can be really happy with the improved sound quality of your intake, I'd say either is a waste of money.

 

Well, this just leaves one question for me, if I want the Injen or the K&N. The K&N will probably cost twice as much, and I don't know if it will produce twice the results of the Injen. Since most FI kits come with an intake, it makes it hard for me to invest in one since I am thinking of FI.

I do wonder, would the procharger be able to use the Injen intake and would it be more effective with it??

2003z, hopefully you will post them somewhere, cause the results of your dynos helped me out a lot.

 

Look, i have the injen intake and SES exhaust for my car and they make the car feel unbelievable. Some people don't like the way the SES looks.........that's fine, buy the borla.....i'll have more HP and i'll have an exhaust look and sound that sets my car apart. Injen makes that HP. There is no doubt. As for all this ECU B.S......I've not had any loss of my gains since i put them on. I raced a guy in a 2000 ram air TA last weekend and he only got me by 1.5 cars. After he asked me, "what you done done to that car man". I don't usually stand behind a company but injen produces the gains they claim..............

 

Looks like the Injen will find its home in my 04' DB Track after I get my car

 

I have one question... (well, actually a statement)

First, I THANK YOU for the work and the Dynos. MY statement or question is this... I am willng to bet that the Injen was Dynoed last. (Wait, I can verify that if I look at the dyno times huh?)

I have also Dynoed my car, and the thing I found out was... EVERY PULL made more power. Even after a cool down period, even after getting the car up to temperature... EVERY ADDITIONAL PULL MADE MORE POWER with no additional mods. I ran a total of SIX pulls...

Now, call be ****, but do the same test and run the Injen First, then the AEM, then the stock... I'll place a small bet that the STOCK numbers when Dynoed last will be the same or higher than the first three pulls on the Injen that was Dynoed first!

Flame me if you wish, call me **** if you wish... I've Dynoed my car and I know what I personally saw with my Z. The MORE you run it, the better it gets. I only with I had the time and / or money to run 12 or 20 pulls one after another to see where the increase stopped.

 

Good Point, 03ZforMe...

Situr80,
did you reset the ECU between set ups? If not, what 03 points out above is absolutely true. It would have been interesting for you to have done a 4th set of runs (either back to AEM or to stock) to see if you HP would have dropped back to prior levels (doubtful), increased (maybe), or stayed about the same as recorded before (equally maybe).

 

Ditto, its been said many times by people in the know. And its been verified many times(my car, Stillen event, other people). But what I want to point out is that it is IMPOSSIBLE to get accurate hp numbers on the Z if you are not doing it in a controlled environment. I dont know how many times I have to say this, but due to the ECU of the Z, crappy 91 octane, and dyno error, dyno numbers can vary as much as +/- 7hp run to run with the same Z, same dyno, same day, same mods. Don't believe me? Ask people in the know. This is not my opinion, this is what I've seen/been told. So with that said, unless you are doing a dyno in a controlled environment, dynoing for something like an intake that is good for MAYBE 4hp is......you can figure it out.