Handling issues - need adjustment advice Options

[Brian Fuerbach]

When driving large sweepers like freeway on ramps at high speed I experience what I can only describe as front end scrubbing. Not understeer, more like the front is just not planted and tracking. Things get better with a full tank of fuel. Is that just the nature of the 914, full tank factored into weight bias, or can the suspension be tuned to emulate the weight.

Here is what Im working with;
-19mm adjustable sway-bar set about 1” back from full soft.
-Koni yellow adjustable shocks
-Stock front torsions
-Rear springs are aftermarket (reddish orange color) but I do not know the poundage.

Any input would be appreciated.

[Brian Fuerbach]

So I talked with the PO today and he thinks that the rear springs are in the 70 to 80#range. Not sure of the brand though. Would a higher pound spring be added to help balance the the 19mm swaybar? Thinking 100# as long as the ride does not suffer too much.

[Superhawk996]

So I talked with the PO today and he thinks that the rear springs are in the 70 to 80#range.

Not likely. 70 or 80lb/in would be very light springs.

OEM springs are claimed to be around 100 lb/in. Without going into a spring dissertation, there is way more to a spring than simple rate but (IMG:style_emoticons/default/confused24.gif) that is the way the aftermarket handles spring marketing.


Here are the OEM spring parameters:

Wire diameter 9.6mm
Number of coils 11.5
Effective coils 10.

Visually those springs on your car look like they have thicker wire diameter than stock springs. Really the only way to know would be to put them in a spring tester that that compresses a given distance them while simultaneously measuring the load force changed.

I just purchased a set of 100 lb/in springs from 914Rubber. I'll post a photo later today for visual comparison