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Originally posted by ptrhahn The FD Eibach pro-kits are NOT progressive as most of their pro-kit springs are. they are linear rate, 365 f, 275 r. This is directly from the mouth of an Eibach engineer. I do not think that spring rate is the whole story as far as harshness on the road. I think it owes more to the valving of the shocks. I actually think my car is LESS harsh w/ the coilovers as opposed to the Prokits, because it isn't crashing over dips and undulations anymore. Koni yellows don't have alot of compression force, and i think they need the stiffer springs. I'm pretty hot on the rates i have!! |
Pettit used to have their lowering springs made for them by eibach to their own specs... so were PFS's old blue progressive units.
Not sure about yours, but i do know that they are often advertised as progressive because most of the prokit line is, though the particular FD application isn't. In any case, i think you can actually use stiffer springs than you realize without a horrible ride. |
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