Compiled Coilover Information
#31
Lexus Fanatic
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Join Date: Nov 2004
Location: Under an IS F since 2008
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Nice list...!!!
Yes the D2 Racing did the job way back then.. My purpose was only dialing in the ride height when I was running the aftermarket Five Axis wheels.. Love those guys!!
I literally drove those coils to the ground many years / many miles later and blew a seal on the front right.. They made the easily replaceable new cores, but at that point I would be refreshing all 4.. I think they are still sitting in my garage stored..
I do a lot of straight freeway driving, so for a short while the OEM 08' suspension went back on...
While working with Mod in Japan, they set me up with a set of CKS Coilovers which I needed once I planned to put on the 12' wheels..
Definitely add that to your list and figure out your true needs..!! Or look up my posts about them.
Joe Z
Yes the D2 Racing did the job way back then.. My purpose was only dialing in the ride height when I was running the aftermarket Five Axis wheels.. Love those guys!!
I literally drove those coils to the ground many years / many miles later and blew a seal on the front right.. They made the easily replaceable new cores, but at that point I would be refreshing all 4.. I think they are still sitting in my garage stored..
I do a lot of straight freeway driving, so for a short while the OEM 08' suspension went back on...
While working with Mod in Japan, they set me up with a set of CKS Coilovers which I needed once I planned to put on the 12' wheels..
Definitely add that to your list and figure out your true needs..!! Or look up my posts about them.
Joe Z
The following users liked this post:
PJSnow (06-29-20)
#32
Great thread. Thanks for putting this together. While I don't for-see me changing anything suspension related, aside from the LCA piece that seems to be a weak point, it's always interesting to see which direction these conversations go. Suspension is always such a loaded topic (pun intended) with the desire for more low coming at the expense of ride quality. Coming from the FWD Honda world the options are endless yet so many of the available choices offer terrible ride quality, mostly due to the spring and damper not being properly paired. Curious how that optic translates in the RWD V8 world. Here to learn mostly.
After having a few weeks of seat time in my 2012 I can't honestly say that I would have a very hard time exceeding the stock suspension's capabilities on the street. Hoping to hit up the local track later this month to get a baseline and perhaps that will show some weak spots.
After having a few weeks of seat time in my 2012 I can't honestly say that I would have a very hard time exceeding the stock suspension's capabilities on the street. Hoping to hit up the local track later this month to get a baseline and perhaps that will show some weak spots.
#33
How do you mean worse? Did it go slower on a timed course, or did you have more issues with keeping it pointed in the intended direction of travel?
There's a calculator for figuring out lots of this stuff, but you have a lot of homework to do before you can fill in the numbers.
http://farnorthracing.com/autocross_secrets16.html
The entire site is well worth the time it takes to cover each of the sections. Once you've read through it all, there are practical takeaways you can use to find a setup that works best for you. You'll need to invest some time to get the most from it, but that's true no matter how you find your path.
Also - Bill Mitchell's suspension analysis software is no longer available. These guys seem to have a pretty decent tool at a very reasonable price: http://www.auto-ware.com/software/asgp/asgp.htm
Lotus offers excellent suspension tuning software packages, but they're not priced for the hobbyist, they're priced for supported race teams.
There's a calculator for figuring out lots of this stuff, but you have a lot of homework to do before you can fill in the numbers.
http://farnorthracing.com/autocross_secrets16.html
The entire site is well worth the time it takes to cover each of the sections. Once you've read through it all, there are practical takeaways you can use to find a setup that works best for you. You'll need to invest some time to get the most from it, but that's true no matter how you find your path.
Also - Bill Mitchell's suspension analysis software is no longer available. These guys seem to have a pretty decent tool at a very reasonable price: http://www.auto-ware.com/software/asgp/asgp.htm
Lotus offers excellent suspension tuning software packages, but they're not priced for the hobbyist, they're priced for supported race teams.
Car was handling worse at the limit, it was quite a few years ago now so my memory isnt too clear on details.
#34
Pit Crew
Thread Starter
Nice list...!!!
Yes the D2 Racing did the job way back then.. My purpose was only dialing in the ride height when I was running the aftermarket Five Axis wheels.. Love those guys!!
I literally drove those coils to the ground many years / many miles later and blew a seal on the front right.. They made the easily replaceable new cores, but at that point I would be refreshing all 4.. I think they are still sitting in my garage stored..
I do a lot of straight freeway driving, so for a short while the OEM 08' suspension went back on...
While working with Mod in Japan, they set me up with a set of CKS Coilovers which I needed once I planned to put on the 12' wheels..
Definitely add that to your list and figure out your true needs..!! Or look up my posts about them.
Joe Z
Yes the D2 Racing did the job way back then.. My purpose was only dialing in the ride height when I was running the aftermarket Five Axis wheels.. Love those guys!!
I literally drove those coils to the ground many years / many miles later and blew a seal on the front right.. They made the easily replaceable new cores, but at that point I would be refreshing all 4.. I think they are still sitting in my garage stored..
I do a lot of straight freeway driving, so for a short while the OEM 08' suspension went back on...
While working with Mod in Japan, they set me up with a set of CKS Coilovers which I needed once I planned to put on the 12' wheels..
Definitely add that to your list and figure out your true needs..!! Or look up my posts about them.
Joe Z
#35
Pit Crew
Thread Starter
Thanks for chiming in, no I dont want just the feel, I need the car to be more planted and balanced in fast corners. Not competing but get together with a lot of freinds on weekend blasts through the mountains..
I hope I dont regret the HKS on my 2011 isf on oem Sachs shocks.
I went through this a long time ago with a 996 turbo, put on new PSS10 bilsteins and the car handled worse at any settings.
I hope I dont regret the HKS on my 2011 isf on oem Sachs shocks.
I went through this a long time ago with a 996 turbo, put on new PSS10 bilsteins and the car handled worse at any settings.
Is the ride more harsh? Smoother? More comfortable?
#36
#37
Pole Position
Mods lets make this thread a master sticky for all suspension/coilover related discussions...........
#38
HKS coilovers with LCA bushes installed Extremely happy with the outcome, way more compliant over bumps than my 2012 oem suspension, more nimble, better more direct streering. Car seems better balance.
l've booked it in for corner weight balance an a proper wheel alignment.
Thanks for everyones help it's very much appreciated.
New stance
l've booked it in for corner weight balance an a proper wheel alignment.
Thanks for everyones help it's very much appreciated.
New stance
The following 4 users liked this post by Slowlane:
#39
Pole Position
Good to hear! I've been contemplating HKS for a while now and debating whether to jump to them.
#40
Pole Position
iTrader: (2)
HKS coilovers with LCA bushes installed Extremely happy with the outcome, way more compliant over bumps than my 2012 oem suspension, more nimble, better more direct streering. Car seems better balance.
l've booked it in for corner weight balance an a proper wheel alignment.
Thanks for everyones help it's very much appreciated.
New stance
l've booked it in for corner weight balance an a proper wheel alignment.
Thanks for everyones help it's very much appreciated.
New stance
At your current ride height, is that straight out of the box with no adjustment? I am wanting to keep the rear at the same height, just drop the front so it doesnt look like im getting ready to leapfrog.
My F is a 2011 and it feels very harsh on bumps (might just be old suspension)
#41
I too am jumping on the HKS wagon. Just paid the parts merchant in Japan but there is a backorder until September (must be really popular LOL).
At your current ride height, is that straight out of the box with no adjustment? I am wanting to keep the rear at the same height, just drop the front so it doesnt look like im getting ready to leapfrog.
My F is a 2011 and it feels very harsh on bumps (might just be old suspension)
At your current ride height, is that straight out of the box with no adjustment? I am wanting to keep the rear at the same height, just drop the front so it doesnt look like im getting ready to leapfrog.
My F is a 2011 and it feels very harsh on bumps (might just be old suspension)
Yes height is straight out of the box.
My OEM 2012 was a bit harsh as well
#42
Moderator
I’m surprised to hear it’s smoother than 2012 suspension. That’s great.
#43
If your after performance and function, then the conversation changes very quickly, and words like harmonics and geometry become king. The price off entry also changes. It’s very important to differentiate the feeling of performance, and performance. The placebo effect is so powerful that it has actually cured symptoms, and is measured in all drug studies. Google “nocebo” effect if you really want to know how powerful a “feeling” can be.
I've never heard of "nocebo" effect, very interesting. Who knows, I could have a bit of this.
But at least I'm happy with my HKS coilovers
I can see where you're coming from
Thanks for the post.
Google search
Is the nocebo effect real?
In summary, the Nocebo Effect is real and can lead to perceived or actual physical side effects of a treatment simply based on the patients negative past experience, perception or expectations of the intervention.Aug 26, 2014
#44
Intermediate
iTrader: (1)
Came across this nugget on ride height measurement in a years-old from lobuxracer. Figured it should be part of this thread if it becomes sticky...
Summary = Measuring fender gap (or height off the ground) is an imprecise method for determining ride height due to variations in body panels. A more precise method prescribed by Lexus is to measure the height of a control arm or sub-frame reference point vs wheel center. It seems really hard in practice, but makes total sense.
Details:
https://www.clublexus.com/forums/is-...ml#post7998048
Summary = Measuring fender gap (or height off the ground) is an imprecise method for determining ride height due to variations in body panels. A more precise method prescribed by Lexus is to measure the height of a control arm or sub-frame reference point vs wheel center. It seems really hard in practice, but makes total sense.
Details:
https://www.clublexus.com/forums/is-...ml#post7998048
#45
Moderator
Expectations mean everything. Some physicians encourage the thought that “you will get better” for this reason.
I work in the medical field, so I read lots of studies.
I think it’s true. That’s why some folks feel a stiffer ride or more feedback from the road and think their car handles better. For the same reason, people install exhaust and feel a power increase since the car is louder.
Its not to discredit mods. Some are valuable. But performance gains can only be measured with data, such as lap times.
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lobuxracer (07-31-20)