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Message: <blockquote data-quote="adian" data-source="post: 3866582" data-attributes="member: 690">Yes the Teins surprised me in their comfort levels! Most coilover type suspension are always over damped!!Back in my R3 days, I actually met wth Toshio Fujimoto, the MD of Tein at the Tokyo Auto Salon. We got as far as signing an MOU to test out a few Tein sets and have a joint collaboration, and he made a few trips down to see us. Unfortunately, the supply costs were too high to make commercial sense for a Proton enthusiast, so it didn't work out. But the Tein's build quality was very good and durability was close to OEM levels!The problem is when the coilover suspension tuners dial-in too much rebound. Having rebound damping which is a bit harder on the low-speed damping improves driver confidence, as he 'feels' that the car is 'hugging the ground' as the unsprung weight (the wheel) pulls the car down over undulations. And they also stiffen the low-speed bump settings so that the car doesn't seem to 'fall into corners' when you turn-in.Too much tho, and the ride becomes a joke (dont have to look far: Honda FD2 Type-R is a perfect example!!). Another example are almost all the locally made and tuned coilovers (Hotbits, Top Perfect, etc).In the case of luxury cars like Lexus, they maintain the slightly stiff bump damping, but go softer on rebound so the car feels like it's 'gliding' over undulations. Which to some drivers also feels like it's 'wallowy'.In general, you want to use as soft a spring as possible in order to maximise traction. You want the tyres to flow with the road, to always stick to the tarmac, not bump or skip over the imperfections. This goes too for all forms of competitive driving, be it circuit racing, rallying, or drifting. Unfortunately it has become a trend that the understanding for street racers is "harder is better". Which is the opposite of what you want.Having said that, for road use and our cars which weigh anywhere between 1350kg to 1500kg (1JZ-GTE conversions wil probably end up weighing that much!) you'd want to run the 8kg/6kg combo that Tein does. With the 1JZ installed, probably 9kg to keep the front hooked up. And dial in some extra compression damping to suit.Anyone know what the standard spring rate is for the Altezza?</blockquote>

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