Originally Posted by DaveW
For discussion sake only... why are you guys using droop to tune your suspension? I know that full scale cars use droop chains/cables to limit overall suspension extension in certain situations... but none of those conditions are seen in 1/10th scale TC racing.
If the chassis is tuned right... you wont NEED droop screws to limit overall travel. A chassis needs to roll and transfer weight in order for its geometry to do its job... unless youre running pan cars. Even then there is still a little bit of roll. Opinions?
There needs to come a point where the roll STOPS. It's going to come some time - and the point of droop is actually two-fold:
1. to limit that roll, that suspension flex. That's when it really
does its turn. (simplistic, but still true)
but mostly. . .
2. to make all of the droop EQUAL. Actually, I don't really care how much droop I have (okay, I do. . .but it's more a "reasonable" amount) as long as it is the same side to side.
If you have 2mm difference in droop from L to R, you're going to have some weird issues.
You can set droop with the shocks - making sure the extension is exactly the same L to R . . . which is actually the old-fashioned way to do it and why the kit instructions say to make your shocks all the same length. Using the droop screws is really just a shortcut (a nice one)
edit: Forgot one thing:
On a really smooth surface (carpet, really groomed asphalt) you can have a really tiny amount of droop. You still want a bit or you'll be traction rolling constantly as you aren't letting your suspension work "down" - but you don't need a whole lot.
On anything that isn't baby-arse-smooth, you need some droop to allow the tires to drop down to grab that surface. Too much and your car will feel sluggish. . . not enough and you'll be bouncing around. . .
Great illustration - think CORR trucks (which are all dropout) vs. F1 (which have almost NO droop) - look at how much F1 cars bounce around the track. They hit the curbing and they bounce - but they react INSTANTLY to drive input.
Now put a CORR (Championship Off Road Racing) truck on the came course - curbing? What curbing? LOL But they're going to be like driving a slug - slow reaction to turns, etc. Use the same spring rates and shock rates, but leave the same amount of shock travel (no limiting droop) and they're still going to wallow since there is nothing to limit the amount of body roll.
Yes - exaggerated example.
One more edit - I used CORR trucks since they run a pretty low ride height (for off-road racing).