Cold Air Intakes - Page 2 - Infiniti Q50 Forum
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post #11 of 53 (permalink) Old 09-05-2019, 11:24 PM
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Originally Posted by jodedor View Post
I meant the reusable dry filters...like AEM.

Still, I don't mind the factory replacements at all as there is just about zero gain on these cars with a drop in.

I got a set from Amazon and they were a little thicker than factory and hard to get in. I gave up and just run WIX replacement filters. I compared the WIX and Fram. They looked almost identical in colors, the rubber, the paper...but, the WIX ones looked better built with tighter tolerances.

Edit: Avedis, if it takes a minute for air to pass through your filters, it is time to change them.

Been using WIX for >10k miles now and it's relatively tighter to fit in than OEM but more surface area (to hold more dirt).
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post #12 of 53 (permalink) Old 09-06-2019, 07:12 AM
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Aren't the stock intakes basically cold air intakes? They aren't taking the air in from the engine bay.
Correct.
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post #13 of 53 (permalink) Old 09-06-2019, 11:36 AM
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Aren't the stock intakes basically cold air intakes? They aren't taking the air in from the engine bay.
Yes! and as there are two of them (each with its own filter) I find it hard to believe that is where a bottleneck could be. And, if there is any restriction in the induction system at all. Even at 7,000 RPM I would think enough air enters the engine.

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post #14 of 53 (permalink) Old 09-06-2019, 12:13 PM
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Yes! and as there are two of them (each with its own filter) I find it hard to believe that is where a bottleneck could be. And, if there is any restriction in the induction system at all. Even at 7,000 RPM I would think enough air enters the engine.
Aye most intakes are pretty well optimized from the factory which is why their is very little improvement to be had without a tune,
that said nearly all intake are setup to isolate the cabin from sounds in the engine bay and will include expansion chambers
or odd-routing to do so.

Those small changes do limit the car when you start tuning and trying to squeeze every bit of power out of the engine.

This is just an example from the G37, but it's the housing just below the vacuum line.


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post #15 of 53 (permalink) Old 09-06-2019, 01:25 PM Thread Starter
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If you can afford it and you think you'll eventually do every bolt on you can do, then why not? I went with the AMS Infiniti logo version.
That was the initial thought do it for the **** of it and looks if there was a clear cut performance difference it wouldn't be a question....but thats not case sooo now I'm on the fence... maybe user preference at this point lmao
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post #16 of 53 (permalink) Old 09-06-2019, 01:38 PM
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post #17 of 53 (permalink) Old 09-06-2019, 01:47 PM
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^^^

Aaaaaaand that is why I haven't bothered.

Even with my turbo subaru. Only reason I got an aftermarket intake is because I went full [email protected] with bigger turbo.

I believe intakes make a bigger differences in an NA application.
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post #18 of 53 (permalink) Old 09-06-2019, 02:15 PM
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While I understand why the dynos are run with the hood open for cooling purposes, doesn't that help the intakes that don't have boxes to isolate the hot air inside the hood? I'd think it would be more real-world to test with the hood closed. Regardless, the OEM CAI performs the best under stock conditions. Have they done similar testing yet on the modified Q50 they said they would be doing to see how the CAIs perform with bolt-ons and a tune?

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post #19 of 53 (permalink) Old 09-06-2019, 02:30 PM
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Originally Posted by Ddnspider View Post
While I understand why the dynos are run with the hood open for cooling purposes, doesn't that help the intakes that don't have boxes to isolate the hot air inside the hood? I'd think it would be more real-world to test with the hood closed. Regardless, the OEM CAI performs the best under stock conditions. Have they done similar testing yet on the modified Q50 they said they would be doing to see how the CAIs perform with bolt-ons and a tune?
I haven't seen any updates videos comparing intakes with a tune. As far as open vs closed hood, I'm not sure it would impact IAT much since hot air rises and your only air source is typically an undersized fan out in front of the car. The cold air kit would have more effect with w closed good if it was getting true air pressure coming into it....at least that's what does reasonable in my head haha.

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post #20 of 53 (permalink) Old 09-06-2019, 07:25 PM
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Just saved me a bunch of money by not buying an aftermarket intake In my 40 years of modding cars, I have never found an intake replacement alone to do any good.
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