We have under carriage video of a stock truck hitting the bumpstops going down the freeway. Adding 2" to the ride hieght means you won't be bouncing off the bumpstops as much, but your average guy will bounce off the bumpstops and over compress the stock spring with a 2" spacer coming in and out of an agressive driveway with a little speed.

I'd venture a guess that 15mph over your average speed bump might bounce the truck off the bumpstops using the stock spring and a 2" spacer.

 

so you state you use a thicker wire when wraping your coils, corect?

coil spring desighn 101:
to get the same spring rate out of a thicker wire requires more turns/wraps.

therefore: more turns of thicker material = less useable travel before encountering coil bind.

now i dont have the specs for stock springs vs. yours but the way you posted it is hog wash.

dont get me wrong, im not doubting that you kit rides well and holds up. but trying to say that putting a 2" spacer is going to kill the springs on a truck that doesnt experiance coil bind is bs. your marketing/tech guy who wrote that is bordering on needing a job working for banks....

 

Coil bind is irrelivant in this debate. Niether of the configurations that we're arguing about compress enough to bind, nor do they need to in order to fatigue over time or take a set.

Your barking up the wrong tree when trying to insult my marketing. I'm the last guy in the suspension biz to hype components to make a hard sale, your confusing me with somebody else... I'm one of a handful of guys who will talk a guy down from purchasing one of my Systems that he doesn't need. I've been know to kill an up sale when a customer calls, looking at my 2.5 System, then discribes a driving habit that doesn't match the Systems performance.

Honesty leads to a happy customer who is going to tell the next guy. We're to savy as Americans, to buy into the hype anymore, society is changing, as your responce affirms.

 

im just simply stateing ive never heard of a coil spacer causeing issues unles, it causes aditional preload and or coil bind, and a spacer on our trucks does neither.
there is enough droop available that adding one simply moves the axle down further in the arc of travel. this is why the ride quality diminishes. now when you hit a bump, the axle has to swing forward then up, but that is the result of any form of lift on a short arm setup.

 

This is pretty accurate, I've hit the bumpstops plenty of times coming out of driveways or going over speedbumps in my '05, and I don't even drive like a complete a-hole.

 

i kept the factory springs in my '05 for about 1 week before i yanked them. couldn't believe how soft and spongy they were- definitely not what i want for a hd diesel truck.