Geo said:
I'm going to disagree here somewhat. The problem with lowering springs is their rate is too low. The car bottoms out in this case.
I don't autocross at all and the only track driving I do is at the DE (driver education) event at the annual convention. Still, I would put my car or Kyle's car up against anyone else's here for ride quality (any car with aftermarket springs that is).
I would only consider aftermarket lowering springs a cosmetic mod. They do not really enhance performance. My SE-R has Prokits, but it will be getting Konis and GC coilovers.
Ok, I've got to go with Geo on this one! Though it's true that you don't have to get adjustable "coil overs" to have a nice ride in a car that is lowered.. but find a solution out there that is cost effective for a P10 or P11? The only way I know of doing this is to goto a spring maker and have them custom make you a set of springs.. big bucks. Also, you have to know the exact stiffness you want the springs and length.. also will they be progressive? Do you want them progressive, and do you have 20 + buddies that want the same thing?
As for the matter of existing products and ride quality, I've riden in and driven a P10 with Eibach Prokits and GAB's (same as AGX's). The car rode rougher than my G20 with GAB's and GC's, and it bottomed out! Same goes for Sprintline springs (I believe that's the brand name). As well as Intrax.. ah hell, Intrax I think was the worse (Justin's old setup)..
Other than the JIC's, and the SHigSpeed setup, I haven't personally seen anything else that will give me the kind of ride quality and handling increase I'm looking for.
I have not riden in a JIC equip'd car, but I have driven a SHigSpeed equip'd P10. I'm just guessing from the look of quality of the JIC that they will work well. Time will have to tell on that one.
"and that's all I have to say about that"