#### Ralph

##### New member

The format could perhaps be as follows:

Year 1982

Model 505

Variant GR (Sedan/Estate)

Front or rear spring (f/r) Rear

Colours on spring (COS) Red Yellow Yellow

Free spring height (FSH) 419mm

Number of coils (NOC) 7

Coil diameter (CD) 15.5mm

Spring rate (SR) not calculated

Spring rate could be calculated by the formula provided by Thanos:

Spring rate in lbs/inch = 11500000 times the coil thickness in inches to the fourth power divided by the coil diameter in inches to the third power, divided by eight, divided by the number of active coils.

I could see this as being very useful for those who want to know what springs are on their car and what they could be upgraded to. This topic regularly surfaces on AF when members ask questions about modifying their car's suspension. All information will be usefull if enough of it was provided to building up the overall picture So if any of you have some springs up in you shed, grab your calipers and start measuring! Also have a look at what is fitted to your car, you can still get info on colour codes and coil diameter which will be helpful although free length and number of coils will be impossible to measure. Here's my contribution to start the ball rolling:

1982

505

GR Sed

Rear

COS Red Yellow Yellow

FSH 419

NOC 7

CD 15.5

SR not calculated (I'm still trying to figure out the formula provided)

1983

505

GR Sed

Rear

COS Yellow White

FSH not measured, on car

NOC not measured, on car

CD 15.8

SR not calculated

1985

505

GTi Sed

Rear

COS Red Red Yellow

FSH not measured, on car

NOC not measured, on car

CD 15.5

SR not calculated

1984

505

SR Sed

Rear

COS Red

FSH not measured, on car

NOC not measured, on car

CD 14.7

SR not calculated

If there is enough interest shown and the specs are posted, I'll collate them into a database and publish it here on AF for all to enjoy. I'll post more as time permits.

Cheers,

Matt.