Hey guys:

I recently bought a 2010 IS-F, got it home and noticed that the OEM springs had been swapped with Eibach Prokit springs. Needless to say, this is not gonna work for me because I daily drive here in Atlanta. Can I get some ideas on recommended setups for a more comfortable ride? BTW, I'm not interested in a drop, I'd like to keep the factory ride height.

 

I'm not sure about the Eibach springs, but I swapped my OEM springs for Tein H Tech for a moderate drop, and the ride is better than the stock springs. Keep in mind this is a sports sedan... it is not going to ride like a soft, cushy sedan. Depending on what you're used to, the suspension may feel quite firm to you.

Most people will highly recommend Swift springs for great ride and conservative drop.

If you want to keep the factory height, you'll likely need to get factory parts.... or coilovers that can be adjusted to factory height... but either option will likely be more expensive than just buying swift springs.

 

My car came with Swift springs on just the front. I still find it very jarring.

 

Have you ever experienced OEM springs?

As I mentioned, I personally found my OEM springs to feel more harsh than aftermarket springs.

 

2010 was the stiffest OE suspension of the entire model run. Tien H is the softest you're going to find unless you swap to full 2014 coils/dampers but even then it's a sports sedan not an LS400.

 

Even at stock height with the stock set-up (Springs/shocks) on a 2010 it's going to be jarring, stiff, and rough riding for the most part (I guess that's relative to your sensitivity). If you want a smooth soft ride go for a full coil over set-up like the KW's which are under sprung from KW and give a better ride than the 08-10 stock suspension setup.

 

i was just thinking about this the other day.
ill be watching

 

If you don't want to spend a lot of money, I suggest BC coilovers. Keep it at stock height, and adjust the shocks to the softest setting. This should workout well.

 

I have a 2010 ISF.

I got KW v3 coilovers and they made a night and day difference in terms of comfort and performance. You don't have to lower your car with coilovers.

Swift springs are another option for a very comfortable DD experience.

Air suspension is very soft in terms of DD driving also.

Let us know if you need any help. We have them all!

-Josh

 

Do swift springs alone really make that much of a difference?

 

The best bang for the buck is the Tein Street Advance coilovers... Made in Japan 16 way dampening, I have them on my supra, putting them on the Lexus next because the current setup with Teins springs is a bit rough. The Teins are on sale for 6xx....

 

I plan on upgrading to the BC's when I get a chance. Stock shocks just don't provide enough dampening with aftermarket springs.

 

I've been thinking of going to the BC's possibly later this year when individual shock dynos will be provided. It was on another thread a while back that BC was going to implement that for shock to shock consistency.

 

I found a set of 2011 dampers & swift springs on ebay and I was amazed at how much better the ride is than the 2008 stock setup. My wife even noticed it immediately, and usually she only notices stuff like "your car is too loud now, I don't like it". Granted, I haven't ridden in a car with K&W or BC coilovers, so I can't say the 2011 setup is any more comfortable than those, just much better than the 2008 setup.

 

I replaced the stock 2011 dampers and Swift springs with HKS Hipermax GT IV coilovers and the car rides much better.