I recently (about 8 months ago) lowered my Cally Turbo -30mm. Looked pretty good. Handled really well round corners. That's if I tried to get round them on two wheels. But you can get round them really fast with the standard Turbo springs.
I used a Koni top adjustable kit, but didn't use the top retaining nuts on the struts. No matter how much I tightened up the nuts the bl00dy things rattled like **ck, hence failed the mot. Then took it home. Tightened it up. Back to the MOT place. Failed, still rattling like a bitch. Third time I even tried tightening the nuts up really tight and putting a quick spot of weld on the top of the strut where it meets the nut. No, I used minimal time and the strut hardly got warm, so no damage there. Still failed. Since found out that you have to use special strut retaining nuts.So back home I go again, strip the struts down (I tell you what guys, I'm getting bloody quick at this job now), then put some aftermarket Bilsteins in, which I fortunately had lying around in the garage. Much better, no rattles. Went better on the road too IMHO. All well and good. Hadn't had the tyres very long, 2 or 3 months probably. I'm running 17's with the PROPER OFFSET! Then one day when I parked the car up on full lock I noticed it. The inside of the tyre was showing fabric whilst there was at least 3 or 4 mm of tread on the outside of the tyre. You wouldn't notice it when you park up normally. Talk about lethal!
So now I've decided to go back to standard ride height, with the bilsteins. It looked bad enough with the rear wheels splaying out, let alone the front ones too! There is only a couple of mils difference between the standard and Billy shock. OK, I've noticed that it doesn't seem as responsive round corners, and I can see a bit of the top of the tyre now too. But now I can get out of the works car park without going over the speed hump at about 2 MPH so I don't hit my head on the roof, and I've noticed this bit of repair work on the road near my house no longer fells like its going to rip my suspension off when I go over it at speed. Now I can go home quicker!! I'll try and post a few photos of how bad the tyres are. Lucky I'm still here I reckon.
Anyone got a standard set of rear springs for a Cally or Calibra turbo they don't want or want to sell? Haven't done the rears yet.
If there's any spelling mistakes, I apologise. Not sure if the spell-checker works on posts.
Cheers, Nunny