Coilover Revalving and Springs combination Advice

[C-unit]

I've seen alot of coilover thread but most of the guy I see just get them off the shelf and put it on the car without much fine tuning. So I started this thread looking for some help. I just got a set of used Aragosta Coilover for my car. They came with 7.6k and 5.5k Progressive springs. Before I upgrade the springs, I have some questions regarding it.

- I am looking to get a better performance over all since I am planning to start drifting and do some track day next year. I am planning to upgrade to Swift 10k front and 9K rear. What are the advice?? Will I sacrifice alot of ride quality over the progressive springs?

- Before determining the spring rate, Should I take the car to corner weight first? I assume if the front end of the car is lighter, I don't need a spring that's as hard!?

- Also do I need a re-valve on those?? I am planning to rebuild it since the coilovers already have 13,xxxmiles on them. Although they are fine right now but who know how long they will last. I've talked to SPLparts but they couldn'
t really do since I got the coilover from Japan.

Finally, any thought of suggestions or advice, feel free to post.Thanks very much.

[mmdb]

- I am looking to get a better performance over all since I am planning to start drifting and do some track day next year. I am planning to upgrade to Swift 10k front and 9K rear. What are the advice?? Will I sacrifice alot of ride quality over the progressive springs?.


Nice choice of coilovers! I have the same set, except they're called ASTs here in the states. As far as spring rates, swift uses a hallow spring correct? Although they're much lighter than non hallow springs, springs tend to lose their rate over time due to heat and wear, and from what I've read and seen in professional racing, I don't know who uses Swift springs. In other words I'm not sure if they're proven. Also, I'd do some research to determine if Swift guarantees their rates within a certain amount of error. Other than that Eibach and Hyperco are always a great choice. With an linear rate spring you will lose comfort, but you will gain consistency on the track as far as feel goes and it'll make your car easier to tune. Those rates you listed will definitely make your car harder to drive and much more uncomfortable. There's not much around that.


- Before determining the spring rate, Should I take the car to corner weight first? I assume if the front end of the car is lighter, I don't need a spring that's as hard!?

Before determining the rate you need to determine a few things. One of them being the tire compound you're going to run. The stiffer the spring is the quicker the weight is going to transfer to the loaded tire. If you go too stiff on the spring your tires will act like the spring and ultimately make your car harder to drive (ie snap oversteer conditions). There's a lot of things you need to keep in mind before determining the rate. I highly recommend speaking with Bruce or Andrew at Performance Shock in Sonoma. Let them know you have Aragosta/AST suspension and what you want to do. They worked on my car so they can roughly give you an idea of what rates you might want. They should be able to revalve those dampers according to your corner weights, unsprung rates, motion ratios etc.... yeah it's a bit of a pain, but definitely worth it.


Also do I need a re-valve on those?? I am planning to rebuild it since the coilovers already have 13,xxxmiles on them. Although they are fine right now but who know how long they will last. I've talked to SPLparts but they couldn'
t really do since I got the coilover from Japan.

You might not have to revalve. ASTs/Aragostas, if they have same design concept, should have a wide range of dampening adjustment, so you might be able to get away with no revalving, but since you bought those used it doesn't hurt.