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Old 06-30-2016, 03:14 PM   #51
maperformance
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No it does not.

Quote:
Originally Posted by SubbieNoob View Post
Did the intake used in the testing sit as low as the MAP intake?
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Old 06-30-2016, 03:19 PM   #52
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Wasn't the testing done on a GS stealthbox? I thought that sits relatively low
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Old 06-30-2016, 03:19 PM   #53
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Where were these temps taken at? And you are saying that IAT's post intercooler don't mean anything?

Quote:
Originally Posted by GrimmSpeed View Post
Quoting this just to drive the point home again. You'll hear this over and over again from reputable tuners and companies. You'll also read people's personal experience on this very subforum about having issues with their intakes that go away when they install the heatshield.

And when it's so easy to obtain this data, why aren't more companies posting it? It can be easily accomplished in minutes, no sense in waiting for anything.



Temperature deltas of over 10 degrees F in identical situations, same day, same roads, and same RPM. It's really hard to argue with these results, and it's even easier to replicate it yourself.

I would also be hard pressed to see IATs decrease as a result of an intercooler upgrade, considering the intake air temperature is measured well before it :P

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Last edited by maperformance; 06-30-2016 at 03:27 PM.
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Old 06-30-2016, 03:29 PM   #54
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lets see the iat's from a stock airbox too.
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Old 06-30-2016, 03:31 PM   #55
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Thinking about doing that. Throwing my stock intake back on, vs our "super hot air intake" then throwing a box on it to see the difference.

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Originally Posted by n2oiroc View Post
lets see the iat's from a stock airbox too.
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Old 06-30-2016, 03:33 PM   #56
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Quote:
Originally Posted by maperformance View Post
Thinking about doing that. Throwing my stock intake back on, vs our "super hot air intake" then throwing a box on it to see the difference.
I'm super excited to see, when do you think results will be in?
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Old 06-30-2016, 03:34 PM   #57
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I have a few cars on the dyno today and tomorrow. But should be able to get this done next week.

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I'm super excited to see, when do you think results will be in?
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Old 06-30-2016, 03:35 PM   #58
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Quote:
Originally Posted by SubbieNoob View Post
Did the intake used in the testing sit as low as the MAP intake?
Nope, it doesn't sit nearly as close to the major sources of heat down there (turbo, exhaust manifold), it's about 5 inches higher up in the engine bay. Although the difference in temperatures is minor, especially if the testing (dyno specifically) if the hood is open.

It's also not made of stainless steel, which takes a little longer to heat up, but also takes longer to cool down (which occurs in a moving car as airflow moves across it as well as through it.

Quote:
Originally Posted by maperformance View Post
Where were these temps taken at? And you are saying that IAT's post intercooler don't mean anything?
IATs are taken at the MAF sensor. I believe you're thinking of charge air temps, which certainly do matter.

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Old 06-30-2016, 03:37 PM   #59
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Quote:
Originally Posted by GrimmSpeed View Post
Nope, it doesn't sit nearly as close to the major sources of heat down there (turbo, exhaust manifold), it's about 5 inches higher up in the engine bay. Although the difference in temperatures is minor, especially if the testing (dyno specifically) if the hood is open.

It's also not made of stainless steel, which takes a little longer to heat up, but also takes longer to cool down (which occurs in a moving car as airflow moves across it as well as through it.

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SHOTS FIRED.
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Old 06-30-2016, 03:39 PM   #60
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Shhhhh, these forums have an anti gun policy...


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SHOTS FIRED.
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Old 06-30-2016, 03:42 PM   #61
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BUT BUT BUT, they said... you test with open hoods to make IATs lower!
AND, they said... you put your intake right near the HEAT!
AND, they said... you made it out of metal that doesn't cool down!
AND! they said you need a heat shield!

***GASP***
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Old 06-30-2016, 03:48 PM   #62
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Yep. Here at MAP, we try to fabricate parts that hurt your vehicles performance as much as possible.

Quote:
Originally Posted by SubbieNoob View Post
BUT BUT BUT, they said... you test with open hoods to make IATs lower!
AND, they said... you put your intake right near the HEAT!
AND, they said... you made it out of metal that doesn't cool down!
AND! they said you need a heat shield!

***GASP***
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Old 06-30-2016, 03:56 PM   #63
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The box is not just a temperature thing... check out this quote from Cobb:

Quote:
Originally Posted by Cobb Tuning View Post
[...]
We also cannot, at this time, endorse any intakes for the 2015 WRX that do *not* include an airbox or thorough shield. When the MAF sensor is near the air filter on the DIT cars, the resulting turbulence can greatly skew air fuel ratio and fuel trims. We'd like to test any units we will be supporting to make sure this effect is minimized. Hopefully all of the manufacturers have been cognizant of this concern during the design stage and we won't need to worry about it on any of their final products.

Cheers

LL
I've never seen any reputable tuner recommend an intake without a box for the 15+ wrx
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Old 07-05-2016, 11:56 AM   #64
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Subscribed.
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Old 07-05-2016, 01:10 PM   #65
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Quote:
Originally Posted by ColdSoda View Post
The box is not just a temperature thing... check out this quote from Cobb:



I've never seen any reputable tuner recommend an intake without a box for the 15+ wrx
THIS. There's a reason Grimmspeed was advertising their CFD usage so heavily. The flow characteristics of the air moving over the MAF wire are so important to a proper calibration. The box/snorkel makes sure the air flows in the same way all of the time. An open intake can just suck in randomly tumbling air from the engine bay. Think about how slightly varying the position of the filter relative to the velocity stack can have such a big influence on the MAF cal.

Yeah the box keeps hot engine bay air out (probably only really important at low speeds) but that isn't its only purpose.
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Old 07-09-2016, 02:50 PM   #66
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I realize I won't get much if any gains from an aftermarket intake, but I am a sound junkie. Which ones have a good sound to them?
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Old 07-09-2016, 06:20 PM   #67
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Quote:
Originally Posted by h3llsp4wn View Post
I realize I won't get much if any gains from an aftermarket intake, but I am a sound junkie. Which ones have a good sound to them?
Pretty much ALL the aftermarket intakes increase sound. What constitutes "good sound" is strictly a matter of personal taste, much like an exhaust. What I'd be concerned with is which intake is preferred by the top tuners for being the easiest to tune. So far, I think Grimmspeed has that spot all sown up...SC
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Old 07-09-2016, 09:05 PM   #68
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I love the sound of my Cobb intake and the flutter of the Grimmspeed EBCS. I was tuned by Cobb/Surgeline locally and the tune/logs are great. But Clark says all intakes other than Grimmspeed have issues so I must have gotten lucky.
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Old 07-10-2016, 02:02 AM   #69
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Quote:
Originally Posted by subarulz! View Post
But Clark says all intakes other than Grimmspeed have issues so I must have gotten lucky.

Hey, I'm just going off all the research I've done over the past year. In the end, I stayed with the stock intake and am staying at Stage 1 for the foreseeable future. Of course, YMMV ...SC
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Old 09-20-2018, 11:29 PM   #70
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Bringing up an old thread...Did MAP ever do the test?
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Old 09-21-2018, 01:56 AM   #71
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Default J-pipe

Quote:
Originally Posted by SubbieNoob View Post
Hi

So after a little bit of research, I was contemplating an aftermarket intake.

Some people tend to think the stock intake flows relatively well and will provide only a little gain if changed.

Does anyone happen to know the gains typically associated with an intake?

Because for the price and only a "5hp" or less gain I'd rather stick to stock and keep the convenience of a drop in filter. But if it's near or above the 10 hp range, I think I might opt for changing it.

Furthermore, does anyone know where the most restrictive part of the intake is? My guess is the 90 degree bend but I could be far off. My assumption is based off of the fact that it seems to taper off a little before the bend and the bend itself poses a restriction.
Stock Intake is good, install J-pipe
Factory pipe is restricted with 2 cats, small dia
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