Sealing Airaid Intake (Take 2) Comparison Modded K&N vs Stock VS Modded Airaid

[ShoBoat]

TSBs/repairs performed on the car were, front hubs (again), PTU fluid change and other regular maintenance bits oil changes, plugs I was running the same type of plugs. Before the 5/14 runs I did have a bunch of stuff done. Fuel pump and others I can't remember off the top of my head. I have sold my old K&N last fall so a back to back is not possible.


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[metroplex]

So what's the long-term consensus on the sealed/modified Airaid versus stock? With just a tune and 93 octane fuel, I'm running the same 1/4 ET as ShoBoat with my stock airbox but my STFT data shows there's inefficiency above 5400 RPM. Will I see any improvement in using the modified Airaid?

[ZSHO]

Check out this thread,hope it helps any.  Z
Here's my Airaid Cai with the upgraded seal which is taller than the original and provides a better overall seal for comparison. Z
  http://www.ecoboostperformanceforum.com/index.php/topic,4705.0.html

[metroplex]

Thanks! That link helped a bit, but the modified Airaid doesn't seem to offer much of a power gain over the stock airbox. Apparently Rich ran the 12.4-12.5 times with catless DPs, summer tires (explains the 1.7 60' times), as well as the CAI. He said that once he installed the Corsa exhaust, it dropped another 0.1 seconds. I wonder how much of that is attributed to the CAI if he was able to get comparable times with the stock airbox in the first place?

I'd also love to see some datalogs of those running Airaids to see how their STFT looks at WOT and whether it resolves the anomaly of STFT dropping like a brick above 5400 RPM.

Are they now including the revised weatherstriping or do we need to perform our own mods?

Has anyone removed parts of the weatherstriping from the hood that surround the Airaid at the front and not just the snorkle port? I saw BPD1151's pics and he only removed the striping in front of the snorkle and kept the second strip intact. It seems as if you removed part of that second strip (the one that surrounds the hood sensor) it would open up the intake to more incoming air.

[SHOdded]

Might be a nod to retaining weatherproofing, but IDK.

[FoMoCoSHO]

Thanks! That link helped a bit, but the modified Airaid doesn't seem to offer much of a power gain over the stock airbox. Apparently Rich ran the 12.4-12.5 times with catless DPs, summer tires (explains the 1.7 60' times), as well as the CAI. He said that once he installed the Corsa exhaust, it dropped another 0.1 seconds. I wonder how much of that is attributed to the CAI if he was able to get comparable times with the stock airbox in the first place?

I'd also love to see some datalogs of those running Airaids to see how their STFT looks at WOT and whether it resolves the anomaly of STFT dropping like a brick above 5400 RPM.

Are they now including the revised weatherstriping or do we need to perform our own mods?

Has anyone removed parts of the weatherstriping from the hood that surround the Airaid at the front and not just the snorkle port? I saw BPD1151's pics and he only removed the striping in front of the snorkle and kept the second strip intact. It seems as if you removed part of that second strip (the one that surrounds the hood sensor) it would open up the intake to more incoming air.

So are you saying you think airflow is choked at 5400 for the stock box?

Is that anomaly at all boost levels or does it change as you crank it up?

I thought I read something over in HPT world saying that meant your airflow model was off a bit...I don't remember if they said more or less than expected.

[metroplex]

Thanks! That link helped a bit, but the modified Airaid doesn't seem to offer much of a power gain over the stock airbox. Apparently Rich ran the 12.4-12.5 times with catless DPs, summer tires (explains the 1.7 60' times), as well as the CAI. He said that once he installed the Corsa exhaust, it dropped another 0.1 seconds. I wonder how much of that is attributed to the CAI if he was able to get comparable times with the stock airbox in the first place?

I'd also love to see some datalogs of those running Airaids to see how their STFT looks at WOT and whether it resolves the anomaly of STFT dropping like a brick above 5400 RPM.

Are they now including the revised weatherstriping or do we need to perform our own mods?

Has anyone removed parts of the weatherstriping from the hood that surround the Airaid at the front and not just the snorkle port? I saw BPD1151's pics and he only removed the striping in front of the snorkle and kept the second strip intact. It seems as if you removed part of that second strip (the one that surrounds the hood sensor) it would open up the intake to more incoming air.

So are you saying you think airflow is choked at 5400 for the stock box?

Is that anomaly at all boost levels or does it change as you crank it up?

I thought I read something over in HPT world saying that meant your airflow model was off a bit...I don't remember if they said more or less than expected.

I ran 11 psi and saw the STFT start dipping at a bit higher RPM (5700? RPM) and actual lambda starts to get a bit richer as well but the magnitude wasn't nearly as much when running more boost.

If using a CAI changes the STFT behavior with the same tune, one could conclude the stock box is a restriction at higher RPMs. K&N claimed their panel filter in the stock box is limited to 750 cfm because of the small airbox. I'm sure at that flow rate, the restriction might be fairly high.

[metroplex]

The latest from Airaid is that they no longer suggest/recommend the longer blade weatherstrip and claim it doesn't exist in their inventory. They also said the weatherstrip's purpose is not to seal the airbox to the hood, but rather act as a gasket to prevent the airbox from rubbing a hole in the hood liner. Yet, their website for the CAI kit clearly said the airbox is supposed to seal to the hood.

[ZSHO]

The latest from Airaid is that they no longer suggest/recommend the longer blade weatherstrip and claim it doesn't exist in their inventory. They also said the weatherstrip's purpose is not to seal the airbox to the hood, but rather act as a gasket to prevent the airbox from rubbing a hole in the hood liner. Yet, their website for the CAI kit clearly said the airbox is supposed to seal to the hood.

That was the exact statement that was related to me a few yrs ago but they were still kind enough to send me a taller blade at no cost since i purchased the intake directly from them.  Z
I think the Taller Blade can be had for roughly 20.00.IIRC
http://www.ecoboostperformanceforum.com/index.php/topic,3492.195.html

[Frozen Blue]

I ran 11 psi and saw the STFT start dipping at a bit higher RPM (5700? RPM) and actual lambda starts to get a bit richer as well but the magnitude wasn't nearly as much when running more boost.

If using a CAI changes the STFT behavior with the same tune, one could conclude the stock box is a restriction at higher RPMs. K&N claimed their panel filter in the stock box is limited to 750 cfm because of the small airbox. I'm sure at that flow rate, the restriction might be fairly high.

Any updates on your results?

[FoMoCoSHO]

Thanks! That link helped a bit, but the modified Airaid doesn't seem to offer much of a power gain over the stock airbox. Apparently Rich ran the 12.4-12.5 times with catless DPs, summer tires (explains the 1.7 60' times), as well as the CAI. He said that once he installed the Corsa exhaust, it dropped another 0.1 seconds. I wonder how much of that is attributed to the CAI if he was able to get comparable times with the stock airbox in the first place?

I'd also love to see some datalogs of those running Airaids to see how their STFT looks at WOT and whether it resolves the anomaly of STFT dropping like a brick above 5400 RPM.

Are they now including the revised weatherstriping or do we need to perform our own mods?

Has anyone removed parts of the weatherstriping from the hood that surround the Airaid at the front and not just the snorkle port? I saw BPD1151's pics and he only removed the striping in front of the snorkle and kept the second strip intact. It seems as if you removed part of that second strip (the one that surrounds the hood sensor) it would open up the intake to more incoming air.

So are you saying you think airflow is choked at 5400 for the stock box?

Is that anomaly at all boost levels or does it change as you crank it up?

I thought I read something over in HPT world saying that meant your airflow model was off a bit...I don't remember if they said more or less than expected.

I ran 11 psi and saw the STFT start dipping at a bit higher RPM (5700? RPM) and actual lambda starts to get a bit richer as well but the magnitude wasn't nearly as much when running more boost.

If using a CAI changes the STFT behavior with the same tune, one could conclude the stock box is a restriction at higher RPMs. K&N claimed their panel filter in the stock box is limited to 750 cfm because of the small airbox. I'm sure at that flow rate, the restriction might be fairly high.

My dip with the stock box and paper filter was only about 3% and its a 400 rpm window in third targeting around 15PSI. (4800-5200)

With the CAI, the dip is a little worse (5%) but that could be other factors as well so IDK.

[metroplex]

Are you targeting a desired TIP of 15.0 psi (about 29.5 psi TIP) or at the MAP?
I tried 15 psi at one point and didn't see a difference in the RPM range (drop occurs in the 5400 to 6200 RPM window).

[FoMoCoSHO]

Are you targeting a desired TIP of 15.0 psi (about 29.5 psi TIP) or at the MAP?
I tried 15 psi at one point and didn't see a difference in the RPM range (drop occurs in the 5400 to 6200 RPM window).

DSD TIP after conversion for BARO