After trying the Aerostar CC850 springs and finding them too short when used with Fatmans dropped spindles I bought some CC851 springs that are supposed to have a installed height 1 1/4" taller than the 850's. After installing them and letting them settle, they were maybe 5/8" taller, neither were enough even with the 5/8" Energy Suspension insulators. Now I realize that if you are not using Fatmans disc brakes and 17" wheels with a 4" backspace you might be ok with the Aerostar springs, but too low for me. So now I am installing the original springs and hopefully be at the height I need. I will post those results. I am going to include a picture comparing the springs just FYI. On the left is the original spring, 15.75" tall, in the middle the CC850, 11.65" tall with an installed height of 8.75", on the right is the CC851 at 13.22" tall and an installed height of 10.00". I have no idea what the installed height spec is for the original spring, could not find that info. One thing of interest if you consider the 851 spring is that the top of the spring is not flat, it is the same at both ends, like the bottom of the original and the 850. It does not set flat on top like it really needs to be IMO.
Just curious, as I have the aerostar springs in my car too and am getting ready to add a dropped spindle kit. What are the dropped spindles from Fatman that you are using, are they 1&1/2"?
I used my stock springs less 1 full coil lopped off. I'm happy with the ride, height could be a bit lower. I do have tire s****e issues going up driveways. So it is what it is.
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