How different are the springs for a heavy duty suspension fc i.e. turbo2 and an FD model....I look on all the sites and they look the same each time just wondering?

 

FD springs rate are a lot higher on most aftermarket coilover systems. I don't know about stock though.
Like the JIC for an FC is 8F/6R while the FD is 12F/9R.

 

what about the sizes because i was looking at the eibachs and racing beats and they look almost identical with a spring rate exception

 

i doubt they're close enought to be able to swap in and out....but I could be wrong. I think that the rear spring on the FD is A LOT longer, but don't hold me to it.

 

anyone else

 

Do you mean stock-style springs for an FC and FD? By stock-style, I mean ones that would fit on the stock shocks (as opposed to an adjustable coil-over conversion). If this is what you are talking about, I would be very surprised if you could install FD springs on an FC or vice-versa.

Aftermarket coil-overs for all cars typically use standard 2.25" or 2.5" ID racing springs, which come in different rates and lengths but are otherwise interchangable. This is one of the advantages of such a setup -- you have a huge range of options and the cost is generally low ($50-70 a spring). Eibach ERS and Hyperco Hypercoil springs are the main race springs used in the U.S.

-Max

 

Yes i found out the easy way....i looked on the factory service manuals for an 88 and 93 so yeap that settles that.... thanks