Dual Spring Rate Coilovers
Dual Spring Rate Coilovers
(OP)
Has anyone ever heard of a coilover with dual spring rates? The purpose I have in mind is that you would be able to drive around town with a nice soft ride, but when you take the car autocrossing or whatnot, you can quickly adjust the coilover so that your wheel rate is increased. You could put a smaller spring inside the main spring that would normally be loose and not compressed, but when you want the higher wheel rate you could crank down the perch for the inside spring so it is compressing.
Has anyone ever considered this type of coilover or seen one already in production? It seems like it is a feasible design.
-Joel
Has anyone ever considered this type of coilover or seen one already in production? It seems like it is a feasible design.
-Joel





RE: Dual Spring Rate Coilovers
Much better would be to drop the perch on the low rate spring
Cheers
Greg Locock
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RE: Dual Spring Rate Coilovers
RE: Dual Spring Rate Coilovers
Regards
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RE: Dual Spring Rate Coilovers
Not an endorsement, just an example:
http://www.racerpartswholesale.com/long70.htm
RE: Dual Spring Rate Coilovers
Shenanigans, on the Porsches, is the "coil locker" an automatic adjustment that can be made from the driver's seat or is it something that someone would have to put on the coils or engage themselves?
Patprimmer, I really like this idea. It appears to be similar to the blade style anti-roll system. Do you know where I could find some pictures of this system?
Cibachrome, I had forgotten about the spring rubber. This is probably the easiest way to effectively change the spring rate. Thanks for the input.
-Joel
RE: Dual Spring Rate Coilovers
RE: Dual Spring Rate Coilovers
Regards
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RE: Dual Spring Rate Coilovers
RE: Dual Spring Rate Coilovers
I haven't tried it because we are limited by the design of our coilovers (short stroke, not enough room to fit >8" of spring) and our spring manufacturer. I hope this was what the OP was getting at though.
RE: Dual Spring Rate Coilovers
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Dual Spring Rate Coilovers
There was an article in Racecar Engineering some time ago about it.
RE: Dual Spring Rate Coilovers
99 Dodge CTD dually.
RE: Dual Spring Rate Coilovers
Regards
"Some off road racers used a torsion bar as a secondary spring that could be bought into action by rotating the fixed end a few deg. This was preloaded in compression by a droop stop and the droop stop was set to maintain the torsion bar lever or arm contact point to just above normal ride height, so it only came into play during bump or on the outboard side during roll"
RE: Dual Spring Rate Coilovers
Regards
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