I have been ask to chime in as there seems to be a discussion going on here.
Because I am not a trader on the EK9 forum, I am here purely as info based so please feel free to ask me if you have any questions or concerns.
I will do my best to answer them if I can.
You can't compare a chinese copy coilover to TEIN, companies like MeisterR just copy another companies coilover, they have no R&D cost, as long as the copy is somewhat close it will be a decent coilover, the problem is they usually use inferior parts and since they have no RD cost like TEIN they can sell it for very cheap.
Of course your tophats do not have camber adjustability, you do not have mcpherson suspension, camber is adjusted from the upper control arm, not the tophat unless you have a DC5.
First, I am a bit disappointed that you think MeisterR is a cheap Chinese copy company with no R&D cost.
I feel that it is a bit harsh especially you are in So Cal half way around the world, so you never seen MeisterR products.
MeisterR does do R&D and design coilovers to suit the UK Roads. What you have to understand is that factory do not "adjust" their products for everywhere in the world. They normally make ONE product, and the specification is based on their biggest market (AKA America
).
When we were developing the Zeta-S coilovers for the Civic, we took a B20 EG that is our Demo Car and basically step through the entire process. We took a damper and had it damper dynoed (which is over damp for UK roads as it was design for the American Market). With that in our hand, we were able to decide the "range" of damping we need. MeisterR dampers are linear valved damper (like most coilovers on the market), so it isn't very difficult once you established the maximum and the minimum damping value at high piston speed (> 0.2m/s).
Spring rate are tested, and the only way to do it is to try a bunch of different rate. We used everything from 5.0kg/mm to 12.0kg/mm.
The best combination we found for the chassis was F:8.0kg/mm, R:6.0kg/mm.
Then we look at the damper stroke travel. We want to pack in as much travel as we can, but of course people like to lower their car also so you have to take that into account. The good news is that because MeisterR Dual Perch Coilovers (we are not talking about TEIN Super Street here), you don't loose any damper travel when you lower the vehicle ride height. So we found the combination with the most travel with the shortest damper casing that will achieve the ride height we are aiming for, and pack that into the coilovers. I can say for the achievable ride height of the MeisterR Zeta-S coilovers, it will have more damper stroke travel than any other Dual Perch MonoTube Damper Coilovers on the market. We literally use every last mm available.
Then finally, we have to look at material. We use MonoTube Dampers because unlike TEIN, we don't charge alot of money and still provide TwinTube dampers; then give you a page of marketing info on "why TwinTube Dampers are superior for street use". The Top Mount is Anodised T6061, the springs are cold coiled SAE9254 Chrome Silicon Steel, the lower bracket are aluminum (to reduce weight) or strengthen double welded steel for MacPherson Strut Setup, and the PillowBall Bearing (spherical bearing) are Japanese Made.
Of course we did not do that for EVERY CAR, but once you have a target damping range, then you can use it as a "relative" to decide what is the best damping range for other car models.
So that is the process we used to develop our new range of Zeta-S and Zeta-R Coilovers.
Also, one of my “mottos” is that I do not sell any products that I do not use myself.
I am currently using a set of Zeta-R on my 700bhp R32 GTR.
While I am here, I'll chime in the PillowBall Mount Discussion also.
For the purpose of discussion, we will use the term “Pillowball” because it is difficult to re-educate all the customers to use the term "spherical".
We provide the Zeta-S Coilovers with "Harden Rubber" bushing in the aluminum top mount with our tested and specified 8/6 spring rate.
We found that is the best for use in the uneven fast roads we have in the UK.
We provide the Zeta-R for the EK9/DC2 Type-R as we found most of their owners are a bit more "track" oriented, therefore they don't mind giving up a bit of comfort for a little better steering response.
The Zeta-R use pillowball bearing top mount, spring rate are 10/8, and damping valving been increased slightly to suit.
The use of the pillowball mount increase steering response slightly as it still take out the rubber bush, but at the same time increase NVH (Noise, Vibration, Harshness) when compare to the rubber bush. We found that most EK9/DC2 owners are willing to give up that little bit of comfort for increase steering response, and that is the sole reason for the Zeta-R.
Otherwise, for most fast road use, I recommend the Zeta-S as that is what it was design to do from the beginning.
Oh, here is a picture of our test car riding on the Zeta-S coilovers.
(at that ride hight it still retain FULL damper travel.)
Hopefully this give you a bit more info about MeisterR and what we do, and maybe it will help change your opinion about us as "Another Cheap Chinese Copy Company to TEIN".