The typical bloke that buys these budget/$1,000 super specials wouldn't even consider to change the oil in them.The Unigroup RX7 (which races in prod sports) had a set of these in for one race weekend Turfed! Went to a custom set of Bilstiens with no adjustment what so ever. Been in the car for 3 years now. Is doing a much better job. If you know anyone that has a series 7 RX7, there's a 1 race weekend old set upstairs. Proberbly give them to you for a case of piss.
I've had 4 different sets of stuff in my car. The guy that did the UE RX7 did mine. 14 kg/mm front, 9 kg/mm rear. I know no one will believe me, rides softer and soaked up our shit Sydney roads better than a set of stock giraffe suspension. The guy that put assembled them at Bilstien wanted to know how they rode as the valving in them was so far off what you would consider "normal".
0414 553 021. Give Dejan a call. He will tell you what's wrong with those BC's. I hope you have a bit of time on your hands.