914 Suspension motion ratios, Comparing notes Options

[groot]

I measured my front and rear motion ratios yesterday and wanted to compare notes with any that have done the same.

For the rear suspension I took ~20 data points and did a best fit analysis to come up with 1.00 to 1.00 damper travel to wheel travel with strong statistical correlation.

My front geometry is a bit different than a standard 914, so the motion ratio should be different, too. I measure ~10 points and found 0.83 damper travel to wheel travel, again with strong statistical correlation.

I'm about to order my rear shocks and this is one of the bits of data they need to build the shocks.

[Brett W]

Those books that Kevin listed are considered by most in the industry as the emminent sources for this type of info.

For the rest of you guys that aren't interested in the formulas and major engineering text. Get:

How to Make Your Car Handle by Fred Puhn
Chassis Engineering by Herb Adams
Race Car Engineering by Paul Vanvalkenburg

Although a little older in material, they are easily understood and won't put you to sleep right away. Once you read these and decide that they can no longer explain the finer points of this complex study. Then pick up the books that Kevin listed. They will help with the true nuts and bolts of what really happens.

The offset busings for the rear are an idea that was proposed before. Tough to manufacture for our situation.