I've been reading all the shock/spring thread on this forum and " the other forum " . As I have the back suspension apart to replace all the bushings . So while I'm in there I might as well look at shocks/springs .
Rebuild the Koni's with threaded outer for ride height adjustment . This seems quite expensive once you have added the rebuild , new bushings and threaded sleeves and nuts . the Koni's are not really easily adjusted for dampning/rebound . But are the closest to stock , if that matters
QA1 from a cost perspective are brilliant and they seem to work well for a lot of people
Ohlins STJ ( as mk e ) at $600 per shock
Ohlins TXX36/40 the ultimate shock . Not sure if they could be made to fit ??? They come on quite a few superbikes . I was wondering if these could be used as they can be had at a similar price to the STJ off eBay . Possibly the valving would need changing , luckly they are fully rebuildable .
Adapt another make of coil overs to fit ( I've found a set of Penske's although they are a bit short
So here's my real question . With all the talk about spring rate
The stock Koni's on a 308GTB are 200 pounds all round ( that's the springs on them ).
For QA1 anything from 250 to 400
m ke 450 front 400 rear ( IIRC )
BUT what about the preload we put on the spring ? On the Koni rear shock the spring is preloaded by +/- 100mm ???? what does that do to the spring rate ?????
In a QA1 situation the ride height can be dropped . As you lower the spring seat to drop the car you are reducing the preload and as such reducing the the spring rate ( am I understanding this correctly ?? ) So yes you start with a higher poundage spring , but you don't preload it as much .
Has anyone measured the actual spring rate of an assembled Koni shock ?
In m ke's case everyone is supprised at his hard spring rates , but we don't know how much preload he is running ?