Intake Shootout! Injen vs AFE vs AVO vs AiRaid vs STOCK!

[ATL BRZ]

We also still don't know if the OP reset the ECU between each intake test. If he didn't then wouldn't the results be messed up horribly since the ECU is learning one intake and MAF placement after another without being reset?

[2forme]

Originally Posted by ATL BRZ

We also still don't know if the OP reset the ECU between each intake test. If he didn't then wouldn't the results be messed up horribly since the ECU is learning one intake and MAF placement after another without being reset?

During my testing, resetting the ECU didn't affect the results much at all. Well within the margin of error.

[brichard0625]

Originally Posted by 2forme

The AIRAID registered a flow very similar to stock. So I think your comparison is still valid.

Thats the chart i was looking for...Ok so today the intake inlet pipe is drying and tomorrow we will see if my little custom intake that cost me 74 bucks does the job lol.

[2forme]

Originally Posted by brichard0625

Thats the chart i was looking for...Ok so today the intake inlet pipe is drying and tomorrow we will see if my little custom intake that cost me 74 bucks does the job lol.

You should txt me pics. lol

[brichard0625]

i posted a pic of it on the snorkel removal thread but once its done ill send u a pic...This is still my prototype just going to see if it works...then custom cold air

[brichard0625]

What do you guys think...Its simple but i think it looks nice considering im not great with this stuff. Decals will bring it out it more when i get em

[Accurate Race Shop]

I have the injen and it was a noticeable difference but other people have been having problems with them mine works great so they might be installing them wrong

Sent from my SGH-T989 using Tapatalk 2

[LeeMaster]

I am glad I bought the right intake. Thanks for sharing the results with other intakes.

For those of you who has the bogging issues with the Injen intake, did you inspect your tubes? The very first one I got gave me bogging issues almost like it took .5 second for the throttle to respond to the pedal. I had bad weldings on the first pipe I received which probably disrupted airflow somewhat causing me to have issues in the first place.



I asked for a replacement pipe and this time it's smooth as butter and has not given me any issues ever since.

[2forme]

Hmm, that's interesting. I wonder if that secondary tube is to bypass the MAFS, causing it to read less air, and thus lean the mixture out.

I still think these dynos aren't really reflective of real world performance. I'd love to get an Injen for comparison with a tune (where that tube wouldn't matter). I think the results would be similar to any other intake.

[Prez]

Looks good!

[Crossover Auto]

Originally Posted by Drift-Office

Someone noticed! Didn't do any logging this time round but we will be... Stay Tuned!

On Mazdaspeed3/6 the ECU is sensitive to the MAF placement and how it measures air flow, which similarly uses a DENSO MAF sensor like the FRS/BRZ.

As for the FRS, I arranged a recent dyno test with the stock intake system with no air filter and it gained nothing as far as noticeable power. Also, adding in a 2.5 mandrel bent catback dropped power causing the ECU to go pig rich up top. From the early testing, the ECU is highly adaptive to bolt on mods.

[Crossover Auto]

If someone has a good scan tool to gather this info before I do. Please post your results.
The following info needs to be collected for a more detailed intake shoot out.

MAF g/s airflow vs. load/rpm - how much air does each intake flow
Wideband AFR vs. load - how each affects the stock ECU tune
Short term and long term fuel trims changes - how the stock ECU tune is compensating for air flow changes
IAT(intake air temp) from idle to moving @ 40/70mph - how each reacts to air temperature which affects the ECU tune

[Drift-Office]

So, about that snorkel :

Originally Posted by 2forme

This^

They probably had the hood open, and a fan blowing on it.

Aren't all sessions on the dyno done this way? *Before you get to what you want to say, read on...*

Originally Posted by ATL BRZ

It absolutely makes a difference. IMO the Airaid dyno run should be scrapped and done again since Airaid has stated many times in their intake development thread that when they put it on a flowbench after removing the snorkel that they measured a 20% improvement in airflow. It is clearly a bottleneck for the Airaid in particular. The velocity stack design of the Airaid inlet is actually very good at drawing in fresh, cool air versus the snorkel.

The instructions for the Airaid do not require snorkel removal but it is strongly suggested by all their reps and everyone that installs their intakes for max performance. That's likely a contributing factor to why you're seeing the top end loss on the dyno.

Would it have helped if I put a carpet fan blowing right into the snorkel from 2 feet away and doing the tests to compensate for more airflow, albeit I don't have a flowbench?

Originally Posted by brichard0625

I took the snorkel out of my bumper and the gap is pretty much the same and with out the snorkel according to the results my car pulled in about 7 more g/s and kept the intake cooler during wot with the stock intake and hks intake filter.

Did this on another customer's car in regards to AiRaid, had negligible differences.

Originally Posted by ATL BRZ

This. Plus the presence of the snorkel in all these tests (where the Airaid and Takeda need a snorkel delete for best results) is why I think everyone should take these results with a huge grain of salt.

Indeed. Like I said, take it for what it's worth - but there will be people who want to see what they want to see. All things equal in a dyno environment though, these are the results...

Originally Posted by 2forme

The Injen and AIRAID units pull more air from the engine bay. As the temps rise in the engine bay, the power these intakes put out decrease (the effect is rather quick, actually). By just leaving the hood open for all intakes, you're negating this advantage, which can produce unrealistic results.

Sure, warmer IATs would yield less power, that's a given. That's why there's cooling fan in front of the car and the hood popped. You're also assuming I'm doing back to back to back runs, which I'm not.

Each run had sufficient time to cool down +/1 3 minutes between runs but hey, I'm not here to argue with you. Did YOU get to do YOUR tests they way you want on the AiRaid intake? Would have been nice to see some collective results.


Regards,


Bob @ Drift-Office, LLC

[Drift-Office]

Originally Posted by 2forme

Were the dyno runs done with a closed hood on a warm car?

I'm assuming these cars had stock tunes...

In the end, I think the only reason it makes that much power is because of the open hood and much leaner AFR curve.

And how many runs did you do of each setup? I'm assuming you picked the best runs for both stock and each intake?

As stated, all testing was done on a bone stock FRS, and all runs were recorded with the hood open, fan(s) on. Cars were @ operating temp before each run. Each intake test had an average of 4 - 6 runs. I had quite a few more runs with the AiRaid one since I thought we had missed something...

Originally Posted by jasper

I have the injen and it was a noticeable difference but other people have been having problems with them mine works great so they might be installing them wrong.

I don't know how they could mess that up, but I'm with you - no issues with the Injen here...yet. I dare say those Injen numbers seem 'legit' since it did feel significantly better (though not as smooth) when I was driving it around the street and freeway.

Originally Posted by Crossover Auto

From the early testing, the ECU is highly adaptive to bolt on mods.

Don't you mean susceptible?

Originally Posted by Crossover Auto

MAF g/s airflow vs. load/rpm - how much air does each intake flow
Wideband AFR vs. load - how each affects the stock ECU tune
Short term and long term fuel trims changes - how the stock ECU tune is compensating for air flow changes
IAT(intake air temp) from idle to moving @ 40/70mph - how each reacts to air temperature which affects the ECU tune

That's great, but I leave that to the intake manufacturers ~ after all, they're judged by the end result - and based on their collective performance at the end of the dyno run...



Bob @ Drift-Office, LLC