The torsion bar and springs are more important, they have to at least be in the ballpark for wheel rate with the tire size/compound being used.
The sway bars are of course important, but they’re basically only handling lateral transfer, so you still need the torsion bars and springs close to handle acceleration and especially braking, too much dive will really screw up your weight transfer as well.
It’s not that clear cut in the real world, obviously on the road or on the track suspension forces are rarely all in a single direction. You’re accelerating or braking while still having lateral motion and trying to keep it all hooked up at the same time. So yeah, it all has to work together.
Set up and raced sprint cars and many other classes for years. If it don't transfer weight it don't turn. To stiff it goes straight . When or where did you ever race and set up a car to turn . No where but the street I presume.
A good friend of mine Tony Hirschman owns and builds Troyer modified nascars . His son Tony is Kyle Bush's Spotter . His son my sons friend.Matt Hirschman is now a three time Champion. Their advise is far from yours. But you read the book. You really do believe yourself.
I believe all your technical advice is from a book. Mine is from hands on from Pennsylvania to Texas and as far south as North Carolina with help from the Hirschman's. You don't have a clue what I know but you keep assuming you do.
I never saw anything you have accomplished except your hand full of cars. That is your only accomplishments and experience , except from what you claim .
PLEASE STOP QUOTING ME AND EVERYONE ELSE WITH YOUR UNJUSTIFIED REMARKS. YOU MAKE YOURSELF LOOK FOOLISH PUTTING OTHERS DOWN TO LIFT YOURSELF UP. I don't bother you why do you have to bother me accept for your obsession and jealousy? Get a life . Stop trolling me and others.
So with that kind of experience, why are you giving such terrible advice for a basic street car?
I’ll quote and reply to whomever I like. I don’t care about your previous experience if you’re giving lousy set up advice, which you are.
The OP’s car set up is pretty basic, and adding Hellwig bars front and rear will absolutely improve his handling on the street which is what he’s trying to do. It’s basic stuff, I’ve done it, it will help. How you get that so wrong with the experience you claim to I have no idea.
Ok. So you’re at 110 lb/in in the rear and 120 lb/in in the front.
But you’ve also got the sway bar up front and a significant tire stagger, plus radials vs the bias ply’s the suspension was initially set up for.
I’d still run more torsion bar up front, even with 200 lb/in bars (1”) and 225’s on all for corners I had a significant amount of body roll.
I wouldn’t add just the rear Hellwig, you’d still benefit from the larger bar up front as well and you don’t want to have more rate in the back than in the front. So either go Hellwig up front and in the back, or source a factory sized rear bar to go with the factory front. And yeah, for a street car I’d still consider going up to something like 1” or 1.03” bars if back roads and handling are something you want to do.