[Silver BLT]

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I have been sent a PDF file of the progressive spring rate for B&G springs. I hope someone can help decypher the graph into common terms. I have attached the graph. This is from B&G corperate designs.



TIA

Ron

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[Greimann]

OK I did a quick conversion of all that metric mumbo jumbo. Looks like the final rate is about 235# per inch and an initial rate is about 180# per inch. The very initial rates are a little confusing because they are really low, but that may be how springs are. I have never seen data like this. Attached is a PDF of the conversion. of the tabular data.

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[Silver BLT]

Thanks Greimann, for doing the hard math for me & the rest of us 968ers.

Given that the stock springs are rated at #160 I don't think that 180# is too low a starting point, unless the car is heavily used on the track or for DEs every weekend.

After showing the graph to my son, he explained that after the first 1 inch of compression (once loaded) the spring rate almost doubles on its ramp up to 235#. 10mm of compression is less than 1/2". Many people have informed me that they have 200# coilovers and are very happy with that rate for street and occasional track use.

I would have prefered H&Rs (cause thats what most others have) but I think the B&Gs will be very close in performance once the twisties start. I will give a report of my impressions and include photos upon completion of current project.

Perhaps a replacement for the hard to find H&Rs has been found. <img src="/forum/images/smilies/968/cool.gif" class="smilie" alt="" />



Silver BLT

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