The official ACUITY Instruments CURL CONTROL Cold Air Intake thread
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Thread: The official ACUITY Instruments CURL CONTROL Cold Air Intake thread

  1. #1
    Supporting Vendor ACUITY's Avatar
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    The official ACUITY Instruments CURL CONTROL Cold Air Intake thread

    Hey guys! So I'm sure a lot of you have seen the HUGE thread that Dave_Si started (click here), anticipating the launch of our then, forthcoming cold air intake. Well, last Thursday we finally launched the CURL CONTROL system, so it seemed only appropriate to create an official thread for it. Please feel free to post questions, installed pictures, dyno graphs, etc. in this thread. If it gets sidetracked, we'll probably edit out unrelated posts to keep it mostly limited to Q&A, testimonials, pics, and graphs. A lot of times when vendors post new products, they copy/paste the text from their site and call it a day. I'm certainly guilty of it. Instead, I'm going to use the space below to kind of explain the design process and choices that made this kit what it is. My hope is that by explaining our goals for the kit, you may appreciate the motives and emotions that went into the design a bit more.

    Click Here to View On Our Site and Purchase

    So we started contemplating building a cold air intake (CAI) kit in mid 2016. We knew roughly how to execute the kit, but it wasn't clear to us WHY we were going to build a CAI. When I say "why," I don't mean in the sense of why a business might make something for profit. The motives there are clear. To understand why we'd ask ourselves "why", you have to understand that we really don't have a desire to design products where we don't believe we can make an impact. There's nothing to be passionate about; we prefer problems that inspire us. While ACUITY is a business, for us, it's also the opportunity to make the automotive community better while doing what we love every day. So for us to commit to making a CAI, we needed to find our "why." Below shows the OE intake manifold kit (shown left), and the RBC (or similar) intake manifold kit (shown right)

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    Making more power is easy. Hold on...don't flip out, I'm going to qualify that statement, haha. Through diligent analysis and testing, there is almost always a gain to be found. The gains get harder to come by as the design improves, so you generally don't start the design knowing if you can beat out a competitor by 0.5hp or 10hp. Power, however, is an obvious goal though for something like this. We wanted a better reason. Ultimately, we decided that if we were going to build a kit, it would be the most well-integrated kit we could offer at the price point we were aiming for. So we started to design a kit, but our "why" was a bit too general. It didn't have actual achievable goals attached to it. After we'd figured out the intake geometry through diligent computer-based analysis and successive dyno testing, we moved onto material selection and chassis integration. The tubing was going to be aluminum, and the whole thing just lacked soul. We weren't interested. We realized that we needed a manufacturing process that would give us more flexibility with geometry. This inevitably led us to the use of carbon fiber. It gave us design freedoms not afforded by aluminum tubing. We wanted to make something people hadn't seen before. So we drew from our personal histories in racing and chose spread tow fabric; (the checkerboard pattern on the intake), which is often a go-to for structural applications like monocoques.

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    Typically on carbon hoods and things like that, manufacturers like to mold nuts into the parts. This often creates long-term problems as the hardware doesn't always bond on well. Instead, we opted for aluminum appointments, carefully bonded on to the carbon to provide a mounting point and MAF mounting feature. A rubber isolation mount goes between the chassis and the stainless steel bracket that supports the carbon to help protect the intake from shocks and to help it move with the engine as load is applied.
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    Last edited by ACUITY; 10-25-2017 at 11:38 AM.
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  3. #2
    Supporting Vendor ACUITY's Avatar
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    Our desire for clean integration drove decisions like adding an aluminum barb in our silicone couplers, something designers often shy away from due to cost.

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    We also have reliefs designed into our silicone couplers where they meet the throttle body, carbon, and velocity stack to help provide a smoother transition for the air as it flows between components. (left two couplers are for OE manifold, right two are for RBC or similar)
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    The battery tray was a really interesting part of the process for us. 9th Gen CAIs generally require some wires to be moved around, and almost certainly require the battery to be relocated. This can often be the most stressful and sloppy part of a CAI install. I think people just accepted that to be ok since it's always been that way. We really wanted to improve here. That's why the MAF wiring is carefully routed around and behind the battery and the harness even clips to the battery tray so no loose wires can fray over time. The same reason drove the addition of the wire routing tab to help secure the MAF wire and battery sensor wire. Another thing that has always bugged us is that grounding of the battery after relocation often seems to always become an afterthought. Many times just screwing the ground to some point on the chassis is good enough, but too often, there can be resulting ground problems. So we built a ground point into the battery tray. The tray has great continuity with the chassis after it's bolted down with the motor mount screws, so this is a really ideal point for a ground. Heavy duty sleeve was added on the harnesses to help make them robust.
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    Last edited by ACUITY; 10-23-2017 at 10:09 PM.
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  4. #3
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    Achieving low pumping losses meant a large filter and velocity stack were essential. We didn't want to use the plastic velocity stacks that have become so common, so we designed our own aluminum parabolic velocity stacks and had them made out of aluminum.
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    Even details like the hose clamps got attention. We opted for German style clamps that have formed threads and rolled edges. They can be a bit more of a pain during install since they tend to have a lot of internal friction, but the formed threads and rolled edges are gentle on the silicone, meaning your silicone couplers are protected from being cut by clamps, ensuring long, reliable operation.
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    We put a lot of love into this design, and we think you guys will love it. Below are some installed images from our OE manifold kit testers:
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    Last edited by ACUITY; 10-24-2017 at 02:50 PM.
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  6. #4
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    Here are a couple of installed pics from our RBC manifold tester:
    Click image for larger version.

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    Last edited by ACUITY; 10-23-2017 at 10:16 PM.
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    Reserved for customer videos, related threads, etc.
    Last edited by ACUITY; 10-23-2017 at 10:16 PM.
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    This post reserved for links to dyno graphs in thread.
    Last edited by ACUITY; 10-23-2017 at 10:17 PM.
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    Super Mod's Pet RujoKinJal's Avatar
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    Quote Originally Posted by ACUITY View Post
    Here are a couple of installed pics from our RBC manifold tester:
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    Just for the record, i am JEALOUS of this setup
    9th Gen Civic POP Crew #88

    2013 RR Si FB6

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    Acuity - Shifter, Cable Bushings, Transmission Spring Upgrade, Coolant hoses, CAi
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  10. #8
    Big Timer!!! lucious's Avatar
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    Quote Originally Posted by RujoKinJal View Post
    Just for the record, i am JEALOUS of this setup

    You picking one up Rujo? Get rid of that Junk2 intake man! lol
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  11. #9
    Super Mod's Pet JDMisland's Avatar
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    I'm jealous of this intake too. I have to hold off on the purchase as I just accepted(today) a position that requires for my family to relocate to Cali. Now only if this was CARB approved!! Shouldn't be hard for that stamp of approval as it's just an intake.
    RujoKinJal likes this.
    2015 Civic Si MSM FB6
    -ACUITY CAI
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    -Ultimate Racing 4pt Strut Brace
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    -BuddyClub Sport Spec Coils W/ Poly Bushings
    Interior
    -Broadway Convex Mirror
    -BuddyClub RS Knob (Donated from Erkon)
    -BuddyClub Quick Shift W/ Hybrid Racing Shifter Base Bushings



  12. #10
    Supporting Vendor ACUITY's Avatar
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    Quote Originally Posted by JDMisland View Post
    I'm jealous of this intake too. I have to hold off on the purchase as I just accepted(today) a position that requires for my family to relocate to Cali. Now only if this was CARB approved!! Shouldn't be hard for that stamp of approval as it's just an intake.
    Our long-term goal is to seek CARB approval on future designs, but at the moment we're a bit understaffed to execute it properly.
    RujoKinJal likes this.
    The best cars are built from the best parts.Visit Hidden Content to give your 9th Gen the upgrades it deserves.

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