[DeTomaso] Shock recommendations

[Göran Malmberg]

The 40-60% number was for the 4 resp 6 kg/mm stock springs, as i recall them
from memory. The Mr is different front to rear so the Wr land where you 
describe,
a little higher Hz number for the rear in heave. Then the factory bar 
wheelrate
should be added to calculate roll balance. Factory ar set to understeer, so 
it is not
really zero balance. Whatever it is, if we like to keep the factory balance 
we must
see to that the front to rear wheelrate balance IN ROLL for respective axle 
is
keept the same. This means that if we alter the spring balance, we must 
adjust the
swaybars accordingly. Or put another way, the cornering balance is a 
question
about the wheelrate balance in roll.

For the bars then.
The bars have another mounting point on the A-arms and thereby their own Mr.
I remember the bar Mr to be 0,26 front and 0,54 for the rear. The front an 
rear
bars have different length and arms. This together with Mr makes it tricky 
to tell
anything about the effect of the bars by looking at its diameter.

I may mention that the idea behind having the rear A-arm in parallell with 
ground is
to get the desired camber compensation movement of the wheels. If the car is 
futher
lowered the upper A-arm will get an angle outside the operating window, and
provide by fare to much camber for the outside wheel. This means that if the 
wheels
are larger in diameter, we have to live with a higher ground setting for the 
car.
Goran.


Göran,

With the figures you gave me the other week a spring rate balance of 40/60 
gives a
wheel spring rate of appr 36/64. I assume the sway bars are sized to give a 
car with
this wheel spring rate a proper balance. If you change the spring stiffness
proportionally I assume the swaybars should be resized accordingly to retain 
the
same balance in turns.

Tomas



> The original springs are about the same proportional rate as the
> weight distribution of the car. If we like to go up in spring rate
> (or down) while keeping the corneering balance of the car, we
> must keep this 60-40 balance. If for example 450-550 is used
> we are having 55% rear stiffness. This gives less rear roll rate and
> call for more rear swaybars for the same cornering balance.
> We could also rise the rear spring rate for the same effect as adding
> a heavier rear bar.
> So, what happen if altering the spring balance and compensating
> with swaybars for the same cornering balance? This is that we get
> another balance in pitch. This affect starting vs braking behaviour.
> Or should I say all pitch roll events.
We shouldnt over dramatice these things, just be awhare of what it is
> about.
> Goran
>
>
>>
>>>
>>> What are the spring rates of the "Quella suspensions"?
>>>
>>
>> Normally 450/550, but you can custom-order any rate you want.
>>
>> Mike