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The mkiv Supra Owners Club

Bilstein bouncing on concrete drive way


Guest lamw001

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Guest lamw001

Hi,

 

I have a 93 J-spec RZ. It has about 50,000km on it now. Everything is OEM except a new set of tire riding on OEM 17" which is still the OEM spec, not wider or lower. When I bought it, I already knew that it has Bilsteins on it. What I didn't know is that they are actually OEM upgrades. I would like to ask you experience with them here since it's a J-Spec OEM option and you guys are more familiar with it.

 

I've been enjoy driving lots before the snow comes and I notice that the whole car bounces pretty bad on a stretch hi-way. This stretch of hi-way is made of concrete and has lots of cracks on it. I was driving normal speed at around 110km/hr. I tried slowing down to 70km/hr and it bounced less but still very noticeable. I was reading from other forum that the OEM pillow top mount will aid in stablizing lots of these bumps. Would the Bilstein upgrade call for the change of the rubber mount to metal that causes the bounces? Or the Bilstein itself is a lot harder to start off? Or mine are just getting aged? (Before I bought the car, I have a mechanic went over the whole car and these dampers do not leak.)

 

Thanks in advance. Any comments would be really appreciated.

 

Mav

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The dampers (shocks) are probably plain worn out. They aren't as well made internally as the German made Bilsteins, same as the Jap made Ohlins aren't as good (or as expensive) as the Scandinavian made Ohlins.

 

The top mounts didn't change, just the dampers and springs with the Bilstein factory option. A new set of Bilsteins would be a sensible to try. The mileage is low, but after 14 years they may well have lost their gas charge.

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Guest lamw001

Chris,

 

Thanks for the advice. So even the dampers are not leaking anyway, they still can lose the "gas charge" which may result in less dampering?

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