General Information:
Plenum Spacers:
Instantly add 10-15 horsepower and a deeper engine note to your Z or G with a Motordyne plenum spacer. The Motordyne Plenum spacers are stealth. The 5/16" spacer is designed to work with your car's stock engine cover and strut bar. Installation is fast and easy; other than unbolting the stock collectors to switch in parts, nothing else is modified or changed. There are two sizes of plenum spacers to choose from and each offers an advantage for different applications. Both add power and a deeper growl under the hood. The 1/2" spacer typically yields 1 to 1.5 HP more than the 5/16" plenum spacer.
For turbo charged and super charged vehicles, the gains can easily exceed 17-23 HP.
Iso Thermal and Copper Iso Thermal:
Iso Thermal and Copper Iso Thermal upgrades reduce heat transfer to substantially reduce upper and lower plenum temperatures. Cooler intake air temperatures increase air density and reduces the tendency for detonation or ping.
1) The first component is an Aramid thermal isolating gasket that is installed between the lower plenum and intake manifold. By installing a Motordyne Iso thermal Aramid gasket between the intake manifold and lower plenum, the heat soak is significantly reduced.
2) The second component is the throttle body Coolant Control Valve (CCV). The CCV allows you to selectively heat (or not heat) the plenum assembly. With local weather temperatures below 55'F the valve is left open. In warmer weather the valve can be closed for maximum thermal benefits.
3) The third thermal management component is the Iso Thermal plenum internal supports. The plenum internal supports are self retaining and self sealing. In addition to providing sealing and support, the internal supports are thermally non-conductive to effectively shut down heat transfer through the six plenum internal posts.
4) The fourth thermal management component is the Copper Throttle Body heater. Copper Iso Thermal is a premium set and forget component that can be used in place of the Coolant Control Valve (CCV). It doesn't matter how hot or cold the weather is, you don't have to adjust a valve based on the season or ambient temperatures. Install it and the throttle body remains heated while the plenum continues to remain thermally isolated. Keeping the throttle body heated prevents ice formation on the throttle body butterfly valve when driving in cold weather. If it snows or gets really cold in your area, use the Copper Iso Thermal so your engine can take full advantage of the cold air you are driving in.
MREV 2 Manifold:
The Motordyne MREV 2 Manifold is high-torque plenum mod designed for use on any VQ engine.
When used with a 5/16" spacer on the REVUP engine, every test to date shows MREV 2 Manifold will add a "minimum" of 15+ HP and 18+ TQ at 4500 RPM. MREV 2 Manifold is easily the single most effective bolt on modification available for the REVUP VQ engine.
When used with on the non-REVUP engine, the gains are very similar to that of the 5/16" spacer but the MREV 2 Manifold will show a slightly lower peak value, with a slightly higher average value and a slightly higher TQ value. Overall, MREV 2 Manifold provides "area under the curve" and is the highest gain plenum mod available.
Stealthy and Discrete:
All Motordyne plenum modifications are stealthy. When installed, most people looking at them wouldn't even know a high performance modification was there. The CNC cut spacers conform very tightly to the stock plenums complex shape for a professionally engineered look. And they have a grit blast finish that allows them blend in with the OEM sand cast plenum. The spacers are cut from alloy aluminum and can resist any amount of thermal soak or boost.
