Maybe I'm missing something (or a lot), but I can't imagine anyone preferring the later to the former.

 

What I mean is I prefer more of my roll stiffness to come from the springs and shocks than the roll bar.

 

I think there is a happy medium to be found. A car with too much spring can be unstable under braking and acceleration due to lack of weight transfer. A car with too much bar will lack lateral grip due to lack of weight transfer.

 

That doesn't make much sense to me...

Why would car be unstable under braking if it has stiffer springs?

And, I don't think it is a lack of weight transfer - it is that weight transfers too quickly that is a problem. You can't really stop that weight to transfer...

 

A bit of movement and weight transfer can be good. It worked for these guys

 

Weight transfer happening too quickly is damping, damping controls how fast the suspension/chassis moves. Spring dictates how far it moves.

 

MrAWD: If it helps, I explained it to a co-worker like this:
Weight transfer/roll/pitch/dive/etc is the car "giving" a bit before the suspension reaches it's "limit". When it's at it's limit, it can no longer really do it's job. Then the car over reacts to anything that upsets the chassis. Think about why a go-kart is so fast and responsive, but very sketchy.
She was wondering why we don't just run super stiff springs and bars to make the car ultra responsive. I told her we may as well weld everything together, at that point
And like letsgetthisdone said: your shocks and struts should be dampen the speed of weight transfer. That's not the spring's job.

If I am understanding everything.

 

So, for the same damper and its settings, 200 lb spring will take a set just as fast as 600 lb counterpart?

 

What I stated was simplified generalization. There is crossover as to how they effect both, but they largely effect only one. You can see these effects by:

A. watching a car with blown or no shocks/dampers going over bumps, and watching the wheel flop around like a fish out of water.
B. Setting a car on the ground with no springs, only shocks, and watching it sink to the bumps stops at a rate you can change by changing the damping force (valving or maybe even clickers) of the shock.

 

You are going too far from were we started a few post above man...and by doing so, you never answer any of my questions!

So, to get back to car that has shocks and springs, you said that car with stiff springs is unstable under braking - could you explain this a bit?

Next you said that car with too much bar will lack lateral grip due to lack of weight transfer. Interestingly that was the reason you used to say why car is unstable under braking as well. Why do you think that lack of weight transfer is causing any of this?

 

Which part do you think I need to be explained here about?

 

Weight transfer equals grip, to an extent. That is why literally why sway bars reduce grip. That is how they effect the balance of the car. You put ONLY a bigger rear sway bar on. This reduces left-right weight transfer in the rear, reducing rear grip, which can alleviate understeer, or cause oversteer.


It's a principle I have hard time putting into words, but mechanical grip is all about weight transfer. You take the weight transfer away, you're left with only the static grip of the tire. When you have a car with big aero, your suspension setup becomes more about keeping the chassis in a consistent position (so stiff suspension) to keep the aero working then it is to keep the tire on the ground.

 

Just trying to help. Nevermind.

 

I again disagree with your conclusions. I think you're perhaps just being sloppy with the terminology but what you say above is completely incorrect.

 

You seem to have parts of this right and know the general direction of which way to go, but not a full understanding about how this really works