Question about helper springs.

[Wendall]

Those of you that have them, do you run a set on front and rears or fronts alone? What length helper spring do you normally use?

[M3SQRD]

Helper spring is only used to prevent the main spring from unseating at full droop. Length of helper springs needs to be long enough to keep the main springs seated when the suspension is at full droop.

Tender spring is used to help "push" the main spring down as the suspension starts to droop/extend (i.e., keeps the main spring "preloaded") as well as soften the effective spring rate if it is not fully compressed (two springs in series). Length and rate of tender springs are important.

I use helper springs on the front struts, and no helper or tender springs on the rear height adjusters.

[Richard@M-World]

OP: is there a specific kit you are looking at?

Originally Posted by M3SQRD

Helper spring is only used to prevent the main spring from unseating at full droop. Length of helper springs needs to be long enough to keep the main springs seated when the suspension is at full droop.

Tender spring is used to help "push" the main spring down as the suspension starts to droop/extend (i.e., keeps the main spring "preloaded") as well as soften the effective spring rate if it is not fully compressed (two springs in series). Length and rate of tender springs are important.

I use helper springs on the front struts, and no helper or tender springs on the rear height adjusters.

Well said

[Wendall]

Yes, I have been looking at the JRZ RS1 primariy, but I have been also tempted by TCK DA, Ohlin RT, and Nitron R1 (not anymore on since getting info that the rear is not a divorced set). I have seen alot of helper springs used on JRZs but not on many other sets. So im looking at the necessity of them. I have seen the rear kits that allow quick change of the springs.

Originally Posted by Richard@M-World

OP: is there a specific kit you are looking at?



Well said

[Wendall]

Originally Posted by M3SQRD

Helper spring is only used to prevent the main spring from unseating at full droop. Length of helper springs needs to be long enough to keep the main springs seated when the suspension is at full droop.

Tender spring is used to help "push" the main spring down as the suspension starts to droop/extend (i.e., keeps the main spring "preloaded") as well as soften the effective spring rate if it is not fully compressed (two springs in series). Length and rate of tender springs are important.

I use helper springs on the front struts, and no helper or tender springs on the rear height adjusters.

M3SQRD, thanks for all your advice. You are truly a suspension guru. Never seen anyone test so many kits. I think I want your exact set up with 500f/800r rates. Can you tell me all the parts you ordered to complete your set? And do you think I need camber plates if its mostly a street car?

[M3SQRD]

Originally Posted by biggynuts01

M3SQRD, thanks for all your advice. You are truly a suspension guru. Never seen anyone test so many kits. I think I want your exact set up with 500f/800r rates. Can you tell me all the parts you ordered to complete your set? And do you think I need camber plates if its mostly a street car?

I've seen RS1 setups with helper and tender springs.

MCS has released their e9x M3 SA damper!!! This is another great option. Also, it can be upgraded in the future; e.g., you could send the dampers back to MCS and have them converted to 2-way remote-reservoir dampers

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