Rear Spring Adjusters - Any real track reviews?

[MPACT]

I am looking at upgrading to a full MCS set up but am looking at rear spring adjusters options. I know Ground Control, Bimmerworld, Turner and others make some but I'd prefer recommendations from you guys that are adjusting them regularly.

Which brands do you like? Not like?

[E90beemerfan]

I'm not sure if I understand what you mean, but I decided to go full coilover on my car. The setup was done by Tom Shirmer in Germany and he uses Nitron dampers and his own spring setup and adjustment. It is worth mentioning that I'm using full coilover without a cage or other reinforcement for the rear shock towers. All working perfectly. To be honest. The low speed comfort is compromised, but high speed comfort improved. And then there is all the benefits of improved cornering ability and agility. Basically a new car in many ways.

[MasterP]

They're all pretty much the same.

MCS/BW/Turner all use similar spanner types. The GC one is different. But the effect is the same. IIRC GC uses different thread pitch so if you want to use different perches like hyperco threaded ones they won't work.

You also may need adapters for the spring diameter you choose.

[MPACT]

Yes, I am looking at the non-rear coilover setup since I am not doing a cage yet and don't like rear coilovers without it. The GC ones seem to be a slip-in and the BW/Turner are a bolt-in. I just wanted to see what people had and how easy/reliable they were for people to adjust.

[Move Over]

All the same...I've used Ohlins, AST, KW on track and they all serve the same purpose with the same strength. The bimmerworld ones are actually manufactured by TC Kline, and they have been my least favorite. I would go with GC, they are the longest and go with a cool locking mechanism.

[RickyBobby]

I've had the ground control rear adjusters and was always wary about how it just wedges itself in the opening hole. Seems like it would put lot of pressure into a smaller concentrated area.

[dogbone]

The JRZ approach is cool. Instead of two small plates that lock together and can get stuck or can strip (which is what they used to have), now they use a bigger, thicker ring that locks in place by an allen screw that tightens the ring down. When you need to adjust, you just loosen the allen screw and the ring turns easily.

They're not cheap, but I like them. Here's what they look like: (I have a spare laying around.)

[Move Over]

Originally Posted by dogbone

The JRZ approach is cool. Instead of two small plates that lock together and can get stuck or can strip (which is what they used to have), now they use a bigger, thicker ring that locks in place by an allen screw that tightens the ring down. When you need to adjust, you just loosen the allen screw and the ring turns easily.

They're not cheap, but I like them. Here's what they look like: (I have a spare laying around.)

Very nice. Does the lock collar spin freely even while under a little bit of spring load? They look very similar to GC Approach. Let me know if you're trying to sell your spare set.

[dogbone]

Originally Posted by Move Over

Very nice. Does the lock collar spin freely even while under a little bit of spring load? They look very similar to GC Approach. Let me know if you're trying to sell your spare set.

I don't have helper springs in the rear to keep tension in the main spring when the car is lifted, so I can't answer your question from experience. The ring spins pretty easily when the hex screw is loosened. My guess is that it would not bind under a light load.

[MasterP]

If you want to be able to rotate the spring under tension use torrington bearings.

[JustAnothaM4]

Originally Posted by MasterP

If you want to be able to rotate the spring under tension use torrington bearings.

This...