Ok lets see if this is of any help.
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1) The distance in compression from resting to the final compression point of the bump stops.
- ride height from standard is increased by approx 30mm (the trucks can be hard for some to climb into and we don`t have a wheel clearance issue 30mm (1.5 inches) works for us ) - this will of course change with - type an size of - Engine / Bullbar / winch / roof rack / motor bike rack / seat type etc fitted to the truck. For referencer EarthCruiser EXP is standard with most of these (including an engine)
2) Could you lift the vehicle from the center of the two front wheels and tell me how much the vehicle rises before the wheels come off the ground.
- How much droop? Good question and one we tried to answer in the video in real life, sorry if that was not helpful it getting the information you are looking for. The most important component (who falls up hill after all??) is droop- It is relative to some degree to the start point above.
Perhaps a more telling is to figure out how the system (the rear axle needs to move as well) works with one wheel lifted and the other drooped as in the 4x4 worlds ramp tests and competitions . The EC in the image ( i like bush setting for testing , never seen the need for a EarthCruiser drive up a fork lift) is allowing the front axle to droop roughly 24 inch (600mm) both wheels on the same axle can not droop like this at the same time of course ( why would you want that on a camper?) . This truck is a 2850 mm wheel base (112 inch) most US FG are the 134 inch (3450mm) wheel base.
For the EC AND THE NEW SUSPENSION:
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3)quantitatively what did you modify: Spring length? Spring number? Spring thickness? Geometry?
- Every thing except Geometry. The EarthCruiser after market solution (the system i guess would guess interest most on the forum) has less droop than the photo, 18 inches is conservative number for your research purposes.
4) what shocks are you providing (make and model) What extension do they have and how much of that extension do you use.
I am sure you can respect the time and effort put in by us and colleagues in doing this and will understand why we will not offer this information.
At the end of the day, we build a system that works for a given GVM that is tested reliable and affordable for use in recreational vehicles. Proof is in the pudding as they say
All of this is relative to the load placed on the suspension by the rest of the truck.
I hope this answers your questions a little better.