In our last article we focused on freeing up the exhaust side of our 9A1 engine. Now we are working on freeing up the intake side of the engine for better breathing. We are going to be using parts from Dundon Motorsports, IPD Plenums, Fabspeed Motorsport and some of our own fabrication. Porsche has many variants of the same model and different models have more or less power. For the Cayman, the S has more power than the base model and the R has more power than either so we are going to maximize the potential of uncorking the engine. A lot of the power variation in between the models is differences in the intake, exhaust with corresponding ECU tuning tricks so we are simply doing things the same way the factory does. With our car our goal is to come close to the power output of the expensive GT-4.
Our first step is to remove the stock intake manifold plenum, runners, throttle body and airbox.
The clamps holding the runners to the plenum are removed.
All the hoses, lines, clamps, and connectors are removed from the plenum, intake and throttle body.
The throttle body is removed from the plenum and intake tube.
The vacuum lines to the dashpots that control the plenum butterflies are removed and the center plenum can be removed from the car.