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Good-Win Racing is proud to introduce the Skunk2 Miata 64mm Pro Series Throttle Body for the Mazda Miata in its exclusive, hard anodized finish. The Skunk2 64mm Pro Series Miata Throttle Body is designed to be used with the OEM Miata intake manifold for bolt-on horsepower and torque gains by maximizing engine airflow.
Skunk2 throttle bodies undergo an extensive design and testing process to produce a throttle body that doesn't just provide more flow but retains smooth drivability and OEM Miata throttle characteristics. Each Pro Series Miata Throttle Body is designed using the latest CAE (Computer Aided Engineering) tools, which results in a unit that exceeds industry standards. Pro Series Miata Throttle Bodies are also CNC machined from forged, billet 6061-T6 aluminum and hard anodized for durability in Skunk2 s signature finish. Pro Series Miata Throttle Bodies are also compatible with OEM Miata throttle cables, which simplifies installation. Each Skunk2 Pro Series Miata Throttle body also features sealed bearings for smooth operation and ultra-strong, upgraded shafts for ultimate durability. All necessary hardware and a new throttle body gasket are included for trouble-free installation.
A larger Miata throttle body is key to producing additional power throughout the powerband on modified engines with increased airflow demands. The Skunk2 Pro Series Throttle Body for the Miata features a large 64mm bore, which results in significant horsepower gains throughout the powerband on heavily modified boosted and high RPM naturally aspirated applications.
Dyno Comments posted at Miata.net thread from Tester and CSP class racer Scott Fraser: "So Dyno results are in. (We did not bolt up a stock throttle body that day to back to back test but we have dyno results from every dyno the car has ever had. I did clean up the mating surface of the intake manifold to the throttle body to make it flow better for the larger throttle body (see previous pictures in miata.net thread show what was done.). Below 3200 rpms the engine lost a little hp and tq, from 3500-5000 it had a steeper curve, making more power and tq. At 5000 to rev limiter the car roughly gained 5-6 hp and 5-6 foot pounds of torque. We drove the car last weekend and throttle felt great. Now we need to focus on everything else."
SIZE NOTES: The stock Miata throttle body is 55mm, but stock Miata manifolds are about 59mm. This TB's 64mm opening has about 18% more cross sectional area than the OEM 59mm manifold opening and about 18% less cross sectional area than a typical 2.75" (70mm) Miata cold air intake pipe. Thus, this TB's 64mm ID provides a nice even flow transition going from intake pipe (70mm), to TB (64mm), then to OEM intake manifold (59mm). The upgraded Miata throttle body size of 64mm inner diameter works especially well with the less restrictive JDM flat top miata manifold (also 59mm opening).
Install Notes: Some have found it necessary to crank open the idle screw a little on install. Be sure to watch the little black idle screw base plate, use some thread locker if it starts to back out.