RS Motorsport :: Classic Speed Restored

Roger,

I know you have a rear sway bar, do you also have a locked solid diff ?

Perhaps its time to divide this up..............

For the daily driver,
go ahead, put on your RS traction arms and a off the shelf pan bar, and lower it 2 plus inches.

Will be real good for drifting then !



What I know.............

The RS traction arms inhibit travel in fact bind the suspension up, in travel causing the inside wheel to go lite.

The off the shelf pan rods raise the roll center ....quickest way to promote over steer

Lowering the car causes some serious rear steer [understeer]
so this cancels out some of above.


I have just converted to 300lbs fronts, from 480lbs, raised the ride height front and back [back via longer shackles] and seeing real gains, I wont be going back.





The problem is stiffening the back and raising the roll height [adding oversteer] is masking the need for attention at the front.

If u got understeer best thing is remove it not mask it.

And before JSA says "yeah a rear bar will cause oversteer" yeah it will with 146 lb springs not 130 here.

Roll control with squat, to allow drive off the corners

I think usere assuming its a fat thing

lsd here

I love it and I haven't had to say anything yet

Danny

Come on Don't fence sit or sit around eating popcorn, add to the discussion

Mark, the problem is u english folk aint got it yet.

Crossplies are dead. therefore u blokes need to do a rethink!

Radials need more suspension angle due to carcus construction.


When we did suspension changes on supercar[s] all we did was roll center changes, at the track. Readers will note this is what they crank/wind with speed brace in rear window at tyre changes, this screws roll center height.

[The other setup was done in the workshop before it got to track, out of interest.......... thats how its supposed to be done.]
The rollcenter is key to fine tuning. this is a 2 to 5mm change at a time so having a pan bar 20mm higher is dramatic difference



Understeer is speed relative.
The faster u go the more u have.
Therefore front needs more and more attention.

Flattening the spring is all wrong.
This produces the most in the way of turn steer.
The front spring eye is level and sometimes below axel cetre line.
This means as wheel travels up it travels forward [like a motorbike swing arm] causing wheel to point into center of car creating rear steer in understeer mode.
Lowering an Escort makes it worse.

Also the tramp bars/radius rods/traction bars (call em what you prefer Wink ) I have always found to be a improvement, yes they may bind the suspension at certain travel (not felt this badly myself though) but the reduction in axle tramp as the spring unwinds has to be a good thing, personally I like my car setup stiff so maybe the reduced suspension travel means I am less affected by this

Old school thought is to have the suspension stiff......this rids car of movement and stops most of the above mentioned problems. [Actually this is a good cure]

Modern? thinking says lets use this travel to an advantage.