Then lift the plenum enough to slide the spacer in. Use needle nose pliers to squeeze the snap in wire connectors and push them out. Set air tube aside. Fully depress the accelerator pedal for approximately 10 seconds. When used with or without a spacer or aftermarket plenum, this modified lower collector will make substantial power gains.
Make sure that the throttle valve moves during above 10 seconds by confirming the operating sound. Remember, a motor is nothing more than a giant air pump, so this increase in flow can mean tremendous gains for your engine. After it is all bolted down you will never need to tighten the bolts again. Verify correct orientation of the gasket when it is placed on the intake manifold then install the lower plenum assembly. Sorry no pics, however there are pics of installation of G35's i'll try to find them. Rev up the engine two or three times and make sure the idle speed and ignition timing are within the specifications. When installed the valve will be hidden under the air intake tube and will have just enough access for manual adjustment. Release accelerator pedal and wait 5 to 10 seconds. Loosen the strut bar jam nuts and turn the center bolt 1. The interior of the plenum may be very oily but this is normal and OK. Resetting The Throttle Body this step is conditional Rough Idle or a SES can sometimes be caused by a change in the throttle body position sensor calibration. With substantial improvements in power and efficiency performance plenums offer excellent bang for the buck. Starting at one side, lift the strut bar bracket just enough to slide in the other three strut bar spacers. Place them underneath the driver side strut bar bracket for additional clearance. Disconnect the air intake tube from the throttle body: The bottom of the plenum post will nest into the cup. Timing is critical for this to work! Standard lower collector with modified Intake Runners for reduced pressure drop. Realign and tighten all the clamps. After assembly, connect the water hoses that were previously going to the plenum and connect them to the copper TB heater. My guess is that its going to be loud. Set the upper plenum down on a rigid surface where you can unbolt the throttlebody. The progressive tightening sequence will help insure compressive force is evenly distributed on the sealing surfaces. Thread washers onto every supplied bolt. About Motordyne Motordyne has worked wonders with Nissan and Infiniti engines, adding impressive numbers to their horsepower and torque figures with items such as its intake plenum spacers, Iso Thermal MREV 2 manifolds, and exhaust systems. The factory ones are HUGE so there is no real way to get around replacing them.
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Kinetix and MREV2 Plenums
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