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GrimmSpeed · 01-23-2014, 11:07 AM

Intake Dyno Testing - Part 2

Round two! In the second part of our testing, we simply chose to test the Greddy intake as well as the Airaid unit. The two seemed similar in design and function and were were interested to know why they seem to perform so differently. You can probably see the direction that we're headed with our intake by now.

Results - Greddy and Airaid

Alright, same deal. I'm just gonna share the data and we'll go from there. One thing to note is that our chart plotter cuts off our run names in odd places, so follow the labels that I've added to avoid confusion. Here's what you'll see:

1. Greddy installed per instructions, without the OEM snorkel
2. Greddy installed with the OEM snorkel
3. Greddy before and after snorkel
4. Airaid installed per instructions, without the OEM snorkel
5. Airaid installed with the OEM snorkel
6. Airaid before and after snorkel
7. Best Airaid Pull vs. best Greddy Pull vs. Stock

On with the charts. We'll keep our thoughts/theories and analysis for the end. Please remember to keep the conversation civil! We debated naming the specific products that we tested, but our test methods are sound and we knew that you all would appreciate knowing the details. This is not at all meant to be a slam on the other intakes available, this is a fact-finding mission so that we can be sure to offer the best possible product when all is said and done.

Greddy, No Snorkel

Greddy, OEM Snorkel

Greddy Before and After Snorkel

Airaid, No Snorkel

Airaid, OEM Snorkel

Airaid Before and After Snorkel

Best Airaid vs. Best Greddy

So, we see some pretty interesting things happen here. The Airaid performs marginally better without the snorkel and the Greddy performs marginally better with the OEM snorkel. The Greddy, in the recommended configuration (no snorkel) has a pretty wonky looking AFR curve. The snorkel seems to tame it a bit, but it runs very lean. The Airaid performs better without the snorkel, because it is extremely rich when the snorkel is added to the set up.

Now, we triple checked our testing logs (we record details by hand of each pull, just in case), datalogs and dyno records to be sure we had our ducks in a row here. Pretty interesting stuff happening! We've got theories based on some of what we discovered in the design of our intake, but I'd love to hear what you guys think!

Matt Beenen
Engineering

01-23-2014, 11:07 AM	#218
GrimmSpeed Join Date: Nov 2011 Drives: '13 BRZ, '12 WRX Location: Minneapolis, MN Posts: 1,676 Thanks: 271 Thanked 3,553 Times in 886 Posts Mentioned: 218 Post(s)	Intake Dyno Testing - Part 2 Round two! In the second part of our testing, we simply chose to test the Greddy intake as well as the Airaid unit. The two seemed similar in design and function and were were interested to know why they seem to perform so differently. You can probably see the direction that we're headed with our intake by now. Results - Greddy and Airaid Alright, same deal. I'm just gonna share the data and we'll go from there. One thing to note is that our chart plotter cuts off our run names in odd places, so follow the labels that I've added to avoid confusion. Here's what you'll see: 1. Greddy installed per instructions, without the OEM snorkel 2. Greddy installed with the OEM snorkel 3. Greddy before and after snorkel 4. Airaid installed per instructions, without the OEM snorkel 5. Airaid installed with the OEM snorkel 6. Airaid before and after snorkel 7. Best Airaid Pull vs. best Greddy Pull vs. Stock On with the charts. We'll keep our thoughts/theories and analysis for the end. Please remember to keep the conversation civil! We debated naming the specific products that we tested, but our test methods are sound and we knew that you all would appreciate knowing the details. This is not at all meant to be a slam on the other intakes available, this is a fact-finding mission so that we can be sure to offer the best possible product when all is said and done. Greddy, No Snorkel Greddy, OEM Snorkel Greddy Before and After Snorkel Airaid, No Snorkel Airaid, OEM Snorkel Airaid Before and After Snorkel Best Airaid vs. Best Greddy So, we see some pretty interesting things happen here. The Airaid performs marginally better without the snorkel and the Greddy performs marginally better with the OEM snorkel. The Greddy, in the recommended configuration (no snorkel) has a pretty wonky looking AFR curve. The snorkel seems to tame it a bit, but it runs very lean. The Airaid performs better without the snorkel, because it is extremely rich when the snorkel is added to the set up. Now, we triple checked our testing logs (we record details by hand of each pull, just in case), datalogs and dyno records to be sure we had our ducks in a row here. Pretty interesting stuff happening! We've got theories based on some of what we discovered in the design of our intake, but I'd love to hear what you guys think! Matt Beenen Engineering Last edited by GrimmSpeed; 01-23-2014 at 11:21 AM.