Ohlins TTX Pro - Porsche 991 GT3 RS

Öhlins Road & Track - 991 GT3 RS

• Cancellation kit available for vehicles with OE electronic dampers. Electronic damper functionality is lost.
• System does not function with factory lift system. 
• System offers independent rebound and compression adjustment via separate compression and rebound knobs.

TTX McPherson strut cars, like BMW and Porsche front suspensions (and Cayman rears), feature a through rod strut design where the shaft passes entirely through the shock where it extends out into the lower section of the damper that is clamped by the upright.  This creates no displacement of fluid by the shaft position (only by temperature expansion hence the tiny nitrogen reservoir) and shields the lower seals from any debris.  The main structural body is a high strength 7000 series aluminum alloy that has significant weight savings over steel while retaining the necessary strength.  These struts have seen tremendous abuse in GT4 classes and do not fatigue out or bend unless crashed severely.  The damper rod is a rather large 30mm diameter shaft that is far stronger and more rigid than the typical 22mm units in other common brands.  This also allows the core of the 30mm shaft, where the least stress is located, to be bored out and save weight while also allowing the installation of a shock potentiometer inside.  The structural shaft load bearings are still inside the damper oil, unlike inverted designs that rely on grease and can get packed with dirt, which eliminates the increased maintenance and associated runout from worn bearings in inverted setups.  These bearings are also far apart reducing friction, loads and thus wear especially in extended damper positions.  Strong, lightweight and rigid.

What is involved when I upgrade to a 3-way or 4-way?

Most people will naturally want to have a discussion with us prior to doing this, but either way it is necessary we speak.  Any TTX damper can be upgraded this way.  We require the system to be delivered to us for the revalving work which we will automatically take care of.  If you are pairing this with different spring rates than Öhlins originally specified we definitely will take this into consideration with our specifications.

Can a shock potentiometer be added to the inside of the McPherson strut assembly?

Yes, a potentiometer can be added to the inside of the McPherson shaft with the wire below the damper.  The sensor is inside the damper shaft which is completely shielded from dirt and debris and actuates exactly with the damper shaft 1:1.  It also has the advantage of being insensitive to steering input since it is along the axis of the damper shaft.