KW suspension and major service for classic Porsche 964

This 1990 Porsche 964 Carrera is the latest 911 to benefit from our extensive experience with KW Suspension fitting and set up, including chassis geometry. Arriving in the JZM workshop for a service and attention to tired suspension, the high quality KW Suspension Variant 1 kit for Porsche 964 was the obvious choice to replace worn-out original equipment.

The KW V1 kit is the ideal suspension upgrade for customers wishing to rely on the experience of KW engineers to set the damper setting, yet determine their own degree of lowering. In extensive driving tests, KW Suspension engineers have set the dampers for the best balance between sporty driving, comfort and safety. Once the durable stainless steel dampers have been fitted, the 911 owner is then free to decide the best height setting for their use and preference.

In service for almost thirty years and with 150,000 miles on the clock, it’s perfectly reasonable that the suspension of this classic Porsche 911 would be past its best. Fitting the superb modern technology of adjustable dampers and springs from KW Suspension of Germany is the easiest way to set the car up for the next thirty years! Email service@jzm.south.co.uk to discuss what we can offer in KW dampers for your 911.

KW Suspension for classic Porsche 911 SC

We’ve just fitted KW Suspension’s latest V3 kit for impact bumper 911s to this 1979 Porsche 911 SC. The conversion from standard Bilstein struts and rear dampers to the adjustable KW kit was very straightforward. We also took the opportunity to change the rear spring plates complete with suspension bushes and covers as the originals were in a pretty bad state.

Our photos show just how much wear the spring plate bushes had endured since 1979: almost forty years ago! Such wear is common on an old Porsche and causes big changes in suspension geometry under acceleration and braking. Sudden geo changes are the root cause of the dangerous rear-steer characteristics found in many older 911s. Suspension bushes deserve careful inspection every service and replacement when worn.

KW’s latest suspension kit is one of two full kits suitable for the impact bumper 911s. The kit fitted to this Porsche 911 SC uses the original torsion bar setup, while the track-friendly Clubsport kit does away with the torsion bars and goes to full coilover suspension. This would be overkill for purely road-use 911s. The V3 kit with its galvanised steel body and adjustable rebound and compression certainly impressed our very own tame racing driver on road test, following a full 4-wheel alignment once the new dampers had been fitted.

“The new KW suspension feels great on this classic 911,” said JZM Technical Director, Steve McHale. “Not too stiff but solid on the road. By replacing the old parts with modern KW dampers, the car feels planted and confident. This kit is the perfect upgrade for cars with older, worn-out dampers, especially when the suspension bushes may also be in need of replacement.”

Email JZM Parts to discuss fitting details and prices for the V3 kit for impact-bumper 911s including the Porsche 911 SC, Carrera 3.2 and 930 Turbo models.

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