08-29-2006, 03:55 AM
Wanted to confirm the stock front spring rate for an M030. I cannot determine from reading around if it is different from a 951 Turbo S, though the 968 M030 shocks seem to have stiffer valving. The Turbo S spring rate seems to be 160 - 175, with 175 perhaps being the '89 Turbo S. Also the 968 has the 100 Coil Spring Rate, 60 Effective Rate coilover spring in the rear that the 951 does not. So the additional rear rate would seem to change the balance of the 968 M030 unless the front wheel width increase (plus .5" or sways made up the difference.)
Also, want to get my recenlty acquired 1993 M030 set up for DE. Was thinking of:
400lb up front and;
25.5 (175lb) stock torsion with 375lb Coil Spring Rate (211lb Effective Rate rear) = 386lb rear.
...initially using stock M030 wheel sizes and stock M030 sways.
Aiming for car to be relatively neutral, with tendency if any toward understeer. Seeing different opinions about whether the car should be biased spring rate wise to slightly stiffer front or stiffer rear to accomplish this (wheels and sway bars beeing stock.)
Also have Koni stock M030's rear that need rebuilding. Have to make a decision to rebuild, revalve, and perhaps add double adjustable capability to rear Koni's, (and perhaps rebuild, revalve fronts and upgrade them to double adjustable at same time though they are servicable) or think about other dampers since they Koni's would be out of the car and incurring expense.
Primary interest right now is DE.
Would welcome any tweaking from those with experience.
Also, want to get my recenlty acquired 1993 M030 set up for DE. Was thinking of:
400lb up front and;
25.5 (175lb) stock torsion with 375lb Coil Spring Rate (211lb Effective Rate rear) = 386lb rear.
...initially using stock M030 wheel sizes and stock M030 sways.
Aiming for car to be relatively neutral, with tendency if any toward understeer. Seeing different opinions about whether the car should be biased spring rate wise to slightly stiffer front or stiffer rear to accomplish this (wheels and sway bars beeing stock.)
Also have Koni stock M030's rear that need rebuilding. Have to make a decision to rebuild, revalve, and perhaps add double adjustable capability to rear Koni's, (and perhaps rebuild, revalve fronts and upgrade them to double adjustable at same time though they are servicable) or think about other dampers since they Koni's would be out of the car and incurring expense.
Primary interest right now is DE.
Would welcome any tweaking from those with experience.
