Originally Posted by NitroWD
what i meant is that the droop screws are limiting my shocks from becoming longer to get higher ride height.
seems like i've got to use droops of either 0 or 1 to get the height i wanted.
Droop / aka upstop.
Droop blocks have always puzzled me, as droop is relative to tyre diameters and the base ride height. As my foams wear, my ride height will change, hence as too will droop.
10mm Ride height: 64mm tyres.
Example scenario only: Assuming we run full tyre 64mm (we dont) and we for the sake of this exercise run 10mm ride height (we dont) with 2mm droop, I assume taking wheels off and placing the car on 10mm blocks, with a 10mm offset guage it would produce to 2mm deviation of upstop/droop
6mm ride height 64mm tyres.
Now to correct ride height to 5mm.. we need would be using suspension to lower, hence this would rincrease the up travel (droop) by 4mm, hence droop would need to be reduced to -2mm of offset upstop/droop.
6mm ride height and 61mm tyre
Now true off 3mm off the tyre, Your ride height dropped 3mm, Increasing ride height by 3mm will then need 3mm more droop. Droop is now at +1 offset with 10mm blocks.
NOTE: ensure your shock pistons do NOT bottom out and unwind ball cup to extend shock length so this does not happen. Droop also prevents this but not if shock isnt long enough, or you'll blow out the shocks as they are axcting as your droop stop.
Have I got this right guys?
Got this wrong...
Droop block still have me preplexed. 64mm wheel = 32mm height from wheel hub center to track. How low/high are the hubs, where to measure from. Where's the arm pivot connected to bulkheads high/low. The bottom of chassis isnt the same level as bottom of wheelhub. Do you need an offset from base of chassis plate to biottom of wheel hub. Is the droop block a levelling or measuring tool. Do you use a sdpecial set of wheels to do a droop check?
As ole mate "El Battoni" pointed out, tyre wear has nothing to do with droop, ride height reduces. Reset ride height and THEN droop comes in to play. My issue was more to do with how do we measure it. Without ZEROing the loaded suspension once it's on droop blocks, what to measure and how to compensate for the suspension preload?
So Im assuming I should choose my tyre diameters. 60F and 62R.. true down a set of old tyres to 50F/50R SORRY
gives me 5mmF and 6mmR ride height. Put these wheels on chassis and ZERO the suspension and chassis plate <1mm off ground. Now I have relative ZERO preload. If I put up on blocks, I need to allow for 2mm of droop, take the shocks off, measure, place shocks on ensuring they arent bottoming out and I should be done.
I cant think of any another way without defining the tyre diamaters,
Last idea.. measurement.
Setup with trued tyres, setup ride height (CH), measure height at bottom of wheel hub (WH) and desired, droop (DH).
Assuming 10mm offset of droop blocks setting measured at wheel hub WH
WH = (10mm - (CH - WH - DH))
and now for a way to measuer wheel hubs while the wheels are on. ROFL... I give up now :/