Ive had H&R springs on my R for at least 2 years and never had any problems and our roads over here arent great lol

 

No. And that's also with 15mm adapters. (Can't use 17mm adapters).

 

That sounds like quite an aggressive drop. Any pics? Would like to see since yours sounds really low.

 

Based on the specs, the drop isn't as much as the H&Rs. However, if the Eibach coils are built with thinner wire, they could compress more than the H&Rs when hitting a bump, causing the liner rub. I've never heard of liner rubbing with the H&Rs or the VAPs. The only complaints have been tire rubbing on the fender lips if the offset with adapters is too radical.

 

I don't think that can be the case because that would mean the coils on the H&R springs limit travel by essentially hitting one another which would be a massive design flaw. This is why I'm really curious to see a picture in this case.

 

I think that is sort of the idea with a progressive rate spring. Think of it like this: when you lower a car you have somewhat less suspension travel remaining before bottoming out the suspension than you did with stock height. If the spring was the same strength as stock, you'd risk bottoming out when hitting large bumps. If you make the spring stiffer than stock, the ride gets noticeably harsher. So the best lowering springs are progressive rate - they have thinner coils at the top, tapering to thicker ones on the bottom. Over small bumps the thinner top coils absorb the small impacts, hence the ride seems mostly unchanged. But when you hit a larger bump, the small coils at the top collapse fully which then forces the thicker mid and lower coils to start absorbing the energy of the bump and since they are stiffer, they resist compressing fully and this prevents the suspension from bottoming out (or in this case allowing the tire to hit the liner). This gets you the closest thing to a free lunch - you get an almost factory quality ride (at least over small bumps) that is only a bit harsher over big bumps.

We had a post recently by someone that had lowering springs installed and his mechanic forgot to re-install the factory rubber wrap that protects the upper coil which is designed to quiet the springs when the top coils compress fully. He could hear the springs clanging on mid size bumps and knew something was odd.

Additionally, I have the VAP springs and can verify what Stuart is saying - they have a very obvious taper to the thickness of the coils.

It may be that the Eibach springs are progressive rate too, but perhaps not as progressive as the VAP or H&R springs and hence while lowering the car less than the H&R overall, they are still allowing more compression over large bumps and hence the rubbing of the tire and liner.

 

No, what I'm suggesting is that the spring rate on the H&R is higher than that on the Eibach as it nears full compression. I'm guessing you are experiencing a relatively soft ride with more body roll than stock.

 

Ahh yes, now that I think it through, all valid points. Maybe the "softer" coils are indeed contacting one another.