onesloryd,
All the springs we make for Hemi, 2nd Gen. and 3rd Gen. Rams offer progressive rates.
I think you're referring to a new coil we now call "VR" for "Variable-Rate. " For the last year there have only been four of these coils in existence on trucks and only 20 sets used for testing. Where did you see them?
Two different coil pitches are combined into one coil. The advantage these coils offer is a dramatically non-linear rate curve allowing them to ride more softly than an OE coil on the street and over small bumps. When you hit large obstacles, they "ramp up" exponentially as the axle reaches full bump. When you plot them on an xy diagram they look impossible. On a truck they're simply amazing. To provide maximum bottoming resistance, the final segment of travel is only a few hundred inch lbs. less than what would warp your spring bucket - which is why we test every single coil to ensure they are built perfectly to spec - and also one of the many reasons why we include bump stops that provide more consistent performance than OE units.
We formally released these coils at SEMA. They'll be available in Spring, 2006 as part of a new KORE suspension system.
Doubleclutch,
To answer your question: Yes.
Additionally, Daimler Chrysler is currently testing two variations of KORE bump stops for use on the Powerwagon and potentially other models. DC told us they ran into the same problems we have with their rubber bump stops. Engineering requested a box of samples for testing, so we obliged. Soon you may see KORE parts coming straight from Michigan as OE.
Gents, we have very specific reasons behind our designs, reasons not apparent to dilettantes. They're reasons we're not going to divulge only to be copied later. These days we're so guarded about our products that we specially-built faux components for our displays at SEMA. Every new part that we exposed to the public was intentionally made an inch or two out of spec. - so Backyard Billy couldn't stroll by with a tape measure and gather useful data while our backs were turned.
2006 is going to be a great year. KORE will release three new Dodge-specific wheels and four new Dodge Ram suspension systems - one for 2nd and 3rd Gen. Rams, one for 3rd Gen. only, and two for the hot new IFS 1500 4x4, a truck that may end up being the next KORE race platform.
Over and Out,
Kent Kroeker