Project 987.2 Cayman S: Getting More Out of the Engine to Chase the GT4 Part 3

The IPD plenum uses the 82mm throttle body from a GT3 model. This is much bigger than the stock 74mm one.

We had the Fabspeed cold air intake but we found with the IPD race plenum and the large throttle body that it didn’t fit. We used the carbon fiber airbox plate and the cone filter but had to make our own large diameter intake tube.  The 82mm throttle body was bigger than the 75mm or 3″ tube and we didn’t like this neck down.

We used 3.25″ 90 degree silicone elbows from HPS to make up part of our new large diameter intake tube.

We also used a section of 3.25″ aluminum tube, also from HPS to make the intake.

The Dundon runners were bolted to the heads and the plenum but into place.

The runner clamps were attached to join the runners to the plenum amd all the lines, wires, dash pots and vacuum lines reconnected.