[Shiny]

67Lemons, thanks again!

[Shiny]

I estimated the stiffness of my current "big-wire" springs (0.66" wire dia), assuming 8 active coils and an average diameter similar to 5401 and 5413. The guess is 179 lb/in. I also assumed a free height of 13.5"... just a guess.

Because the Moog specs effectively show an installed height at a "test load", a direct comparison of installed height in the same car doesn't jump off those pages.

So I assumed 800 lbs on each spring and calculated the installed height when compressed from the published free heights (free height - 800 x rate).

Here's the installed height ranking I came up with. All make-believe, but maybe useful for "relative" heights and at least feels better than nothing.



Mike

[Shiny]

I narrowed my options to cc501 and 5385 and will order the cc501.

They should sit pretty similar, the cc501 being variable rate vs the fixed rate of the 5385. I think both are pretty stiff... hopefully not too much as to ride like a truck.

Like many parts for these cars, it appears Moog has discontinued some of the a-body PNs, or at least no-one sells them. Unfortunately, this includes their 5413, which I think is a replacement for the "stock" HD or "Ride & Handling" spring.

The 5379 would lift the car a little but is soft, similar to the 6319 and 6321.

The UMI spring would probably be good for me, I just don't want to pay for it, at least for now. They told me the free length is 14.5", which would meet the goal of lifting a little over stock.

I still haven't figured out what I put in my car, but I think it must have been used in a wagon or some specialty application. I have to go rent a compressor to get them out because the free length is over 13.5" and it's STIFF.

Here's my updated chart for anyone interested.

[BN]

I've ordered new front and rear springs from Ames for three different cars now using the chart in their catalog and they've been perfect all three times.