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Project GD STI, Getting Ready For the Engine Swap

  • Mike Kojima

 

The IAG Street Series Subaru Engine Mounts significantly reduce engine movement from worn-out OEM mounts and provide a solid feel from the drivetrain during spirited driving. The 75A durometer bushings included with the mounts are 5-7% stiffer than the Subaru GROUP N mounts so very little NVH (Noise Vibration Harshness) is added in the cabin. The engine mounts feature cold rolled gold zinc plated steel brackets, gold zinc plated pins, hardware, and aircraft-grade 6061 billet aluminum anodized carriers that are machined in-house.

IAG’s Engine Mounts, have the ability to change out the bushings, adapting to the needs of the user. The Street Series mounts use a 75A bushing but you can upgrade to harder 90A or even Solid bushings in the future. Instead of having to purchase new stiffer mounts, you can easily purchase a bushing kit and change your mounts to Competition or Race level performance.

The IAG Street Series Pitch Stop Mount reduces engine and transmission movement under hard acceleration. The CNC machined billet aluminum mount includes 75A durometer bushings and a black anodized finish for corrosion protection. The street series 75A durometer bushings are slightly stiffer than the Subaru Group N mounts and due to the higher durometer used in the bushings, a slight NVH (Noise Vibration Harshness) increase is perceivable through the interior. IAG’s pitch mounts are specifically designed with the ability to swap bushings. The Street Series pitch mount can be easily upgraded to racing specifications by adding our Competition Series 90A durometer bushings or Race Series Solid Steel bushing that significantly increases stiffness over the stock and GROUP N mount.

We are using IAG’s skid plate o replace our weathered, battered, and cracked factory plastic splash guard. It is 3/16″ thick and bent from a single piece of 5052 aluminum. It is well suited for both lowered streetcars as well as off-road rally cars. It provides protection to the headers and oil pan from the front of the U-frame back to the transmission brace. The bottom of the plate features a brushed finish. A complete hardware set is included along with spacers that allow installation on vehicles that require additional clearance due to aftermarket headers.  The plate probably helps aerodynamics and chassis stiffness as well.

To handle the abuse that AWD can place on the drivetrain yet still be daily driver streetable, we are using an X Clutch twin disk clutch.  To see a video on how this works with all the details, check this out.

We also did an article on the clutch here.

Related

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3 comments
  1. Mitch says:
    January 31, 2022 at 8:44 am

    Love all the updates, and that its all finally coming together!

    One word of caution is any pitch stop mount, from the aftermarket, seems to just perfectly resonate the factory firewall.

    If you have the chance getting a good CLD layer in and as high up as possible on the firewall surrounding that immediate area in-cabin, opposite the mount will make a dramatic difference in reducing NVH. If only 50% of the firewall were covered, that is enough. e.g. 4-5sqft total. Minimal weight added, but very targeted to that part. SecondSkin, Resonix, Dynamat Extreme are all good examples of quality CLD tiles that can handle heat and not put off a strong smell.

    Reply
  2. Spec R says:
    January 31, 2022 at 11:28 pm

    Can’t wait to see this all come together. Best wishes for reliability and longevity. HP per dollar spent be damned lol

    Reply
  3. Luke says:
    February 1, 2022 at 10:28 am

    Any picks of install of the COBB’s Overflow Tank and Washer Reservoir filler? I am interested in that kit and install.

    Reply

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