[Tag]

I just ran across this thread searching on the AST 4100 setup. I'm still trying to figure out what spring rate to get. I'm not planning on tracking my car and want a rate that is forgiving when I come across crappy roads. Everyone here with AST's seems be saying 400F/800R rides like stock. Is that really true? I would think that it's slightly harsher. After reading how comparable the ride is to the stock ZSP suspension I'm once again lost. Do I go with 336F/672R or 392F/784R w/Swift springs?

If you lived in a place where some parts of your commute were pretty bad what spring rates would you go with if you were getting the AST 4100 w/Swift springs?

[rcusick]

Believe it or not. Does ride more comfortably than stock.

[dvpouldar26]

Hey everyone. I've been shopping around for coilovers and would love to go with KW Clubsports, AST's with swift, hyperco or eibach springs, but my budget doesn't allow for those setups. After some research about the large difference in motion ratios between the front and rear of e9x's, and how this translates to the high spring rate needed in the rear because of the 33% motion ratio on the rear compared to the ~85% motion ratio in the front, i think that a 400/800 setup would be the best setup for me. My question is that is it possible to run an aftermarket linear spring with these spring rates on such coilovers as a KW v1 or v2, or the ST V1 (galvinized version of the KW's)? Do you think that the unadjustability of the ST and KW v1's would affect the handling in a bad way? Is using a linear spring conversion on these kits a bad idea even these kits are all that are in my budget range at the moment? Also, what about the sonic tuning s1's (come out of the box with 400F/500R, but can custom order 400F/800R)? The S1's also come with camber plates so I can dial in some neg. camber up front which would also help with some of my understeering issues. Let me know what you all think. Thanks in advance.

[tibra1]

Originally Posted by rcusick

Believe it or not. Does ride more comfortably than stock.

That def seems to be the general consensus and you heard Berk talking about 400/800 controls spring oscillations better..

i took the plunge on 400/800 and went with AST 4200 D/A..from HP Autowerks...so now waiting on delivery from Holland.

[tibra1]

Originally Posted by dvpouldar26

My question is that is it possible to run an aftermarket linear spring with these spring rates on such coilovers as a KW v1 or v2, or the ST V1 (galvinized version of the KW's)?

Harold at HP Autowerks sells the swift spring conversion kit for KWs..it suppose to really make a big difference

[swifty]

hey, I just got the Tc Kline True match coilovers. For those who live in the cold weather area, do you guys rust proof the koni yellows with rustoleum etc since these are not stainless steel shocks?

[HP Autosport]

Originally Posted by tibra1

Harold at HP Autowerks sells the swift spring conversion kit for KWs..it suppose to really make a big difference

Thanks for the plug.

Yes, the Swift spring coversion can really transform the KW V-series coilovers from a run of the mill lowering coilover kit to something capable of aggressive street driving and track duty.