Vervish

iTrader: (4)

Just installed the coilovers - initially, the ride feels the same as the swift springs/stock struts. They are also very quiet overall. I have not driven it too aggressively so far, but I am sure the handling will be on par or slightly batter than before. Body control is great and it soaks up bumps well...very streetable.

MileHIFcar

Cool, thanks for the feedback! Looking forward to more feedback as you drive the car aggressively.....

Max16

So now i'm hesitating between the HKS GT and the BC.

Kojak77

All I can say is the HKS Hipermax IV GT's are a ****load smoother and more refined than the stock/Swift springs set up I was running. I've never been in an ISF with BC's.

Supraman16

iTrader: (5)

Its not even a comparison. I've had both and all I can say is HKS all the way!!!

MileHIFcar

Do you guys think they are approaching Ohlins quality or KW quality, or just slightly below them quality wise?

MileHIFcar

Here is a review of them from the Supra forums and one member has an ISF, don't know if it's Supraman here but he offers some good insight as well as the OP on the HKS hypermax IV coilovers:

http://www.supraforums.com/forum/sho...at-Thunderhill

Max16

You have the stock spring rates?
HKS can upgrade the springs but recommend not going more than +2.
Do you think this upgrade can be good or the 16-10 they offer is perfect?

Supraman16

iTrader: (5)

Yup, went with the stock HKS Spring rates for the Swift Spring upgrade as well: 16K front and 10K rear. I liked how neutral the car felt with HKS spring rates were, the Swift Springs in the same rates made it just a tad bit smoother.

Max16

Bought the HKS and installed them.
What are the damping setting you're running?

So far, way better than the DGR. Still some unstable feeling on large bumps but probably not noticeable for most users.

Supraman16

iTrader: (5)

I kept at the HKS recommended settings of 15/15 clicks from full stiff, front and rear. Don't go too soft because I noticed that the rear especially gets a bit squirrely if it's too soft.

MileHIFcar

Do you guys think that they the GT's are undersprung for an occasional track day vs the SP's that are more track focused/oriented?

Actually I don't know if HKS even makes the Hipermax IV SP for our application?

Max16

I'm at 10-10 from full hard right now.
Maybe I didn't try 15-15 long enough

Max16

I think it all depends on the track.
It's an ok kit for occasional track use but if it's your toy (not DD) you can easily go higher rates.
They don't do the SP but you can go +2 on the spring rates from factory at no charge.

It's a really smooth suspension, well damped.

MileHIFcar

So would that put the spring rates at 18k/12k? Then you can go with swift as an upgrade too correct with those spring rates?

I wonder if you go with the 18k/12k set-up if it will still ride smooth and retain the well dampened character of these coil overs since that's what HKS was aiming for with the GT's?