did a test max speed touched 150km/h, roads empty and straight with a bit of unleveled regions for high speed, 80-90 km/h on okayish roads which has a good amount of irregularities like some patches come of with the rains not exactly potholes. 40km/h on a road just done after extensive digging and caving in at few places(terrible work done), cornering 40-80km/h speed breakers bad ones at 10 km/h good ones at 20 km/h.
well this modification will suit people who don't mind sacrificing a tiny bit of comfort. I went through some rough patches at 20 km/h it felt better but the impact gets through the cabin and the dashboard notifies you as well as the steering rattling is back and louder but occasional. Drove through a straight empty road which had very less irregularities but the car would bounce a lot her prior to the spring change the front seems planted now but the rear bounces and wobbles id say its a 45% improvement on high speeds, if the rear would've been modified id say way better.
drove on some roads where the car would wobble a lot at 80-90 this time wobbling was way to less just the rear being soft gives a sea saw kind of feeling. Improvement 25%.
drove at 40km/h on a very bad un leveled road again the front was way better then what it used to be but the sea saw feeling was even more worse here the rear is degrading this in fact it feels more worse then before. Don't find any improvement here.
Did a few cornering at different speeds started of at 40km/h just to get to know the suspension, as i was cornering it kept playing in my mind the feeling of the car overturning but as i did it nothing very well done, upped the speed to 50 still splendid 60 then 70 still going good only rear feels not in control. 80 still awesome got a major smile on my face. earlier at 40km/h id feel the car about to overturn or go out of line. Improvement 70%.
comforts: well i don't mind throwing it away for high speed handling and some cornering but then again the decrease in comfort is very less though my dashboard was giving the noises.
road noise: considerable increase in noise extremely rough roads i could get the feeling in the steering.
Absolutely no bottoming out.
overall improvement 40-50% but let the pro(dad) see what he feels.
P.s: these are my own findings it may vary depending on your engine, liking and expectations.
currently I'm happy just have to check my alignment it seems to be out again
but will have to see whats it like after some km as the previous ones started to degrade as km were put in.
if you guys want to change yours they will do so if the car bottoms out or you tell them of suspension noise. And by the way the auto pothole sensing wipers are there and come in at an early speed for me say 50 km/h