General suspension questions

[Jezza_hr]

Hey guys, I'm trying to gather some suspension info if you're willing to help out?

I've been running quite a stiff set up on the 86 since I first got it and I'm looking to soften up and heighten the ride a bit for road use as it doesn't get enough track action to warrant the intensive spring rate that it's running and it's getting to a point where I think other components of the car are taking a beating as a result.

Now, my only real gripe is, I don't know what spring rates on there, although I would hazard a guess by how little play there is in each corner it's running the popular 8kg front and 6kg rear spring rates. I would like to aim to 6 front and 4.7 rear with some added height to reduce the skittish behaviour and grounding I sometimes get at the lowest point of the manifold. But it's the question of where to start.

My car is running a front coilover conversion (supposedly TRD but I see no mark to resemble this) and uprated springs and separate shocks at the rear (These do look like TRD). Now, I would like to keep the coilover conversion at the front and adjust them appropriately to gain the right ride height, comfort and performance but I need to make sure the springs at the back are running an appropriate ride height to maintain an equal balance throughout. I also want to be able to adjust the corner weight appropriately to make sure everything seems to match up, although I'm guessing this is a little bit more difficult when only running coilovers at the front?

I have been looking at the TRD 4.7kg springs for the rear as the appropriate ones for the job (correct me if you think there is anything better value out there, otherwise let me know of the cheapest place to get a set of TRDs if you know of a place) but I don't know where to start to get springs for the front coilovers. Are they pretty much all of the same diameter or is that wishful thinking? I also seem to be having trouble finding them being sold separately from an entire coilover set.

Any help with these questions, as always, would be greatly appreciated. I also wouldn't mind hearing other peoples set ups to get a feel for the best road performance, if you care to share?