Re: B6 or B8 with new springs?
Hmm.... If you dont care about the looks, go for the B6. As far as i can imagine, with stock springs and B6s you ll have great performance with quite good comfort.
But you still will have the standard looks. If you re interested in imroving the looks, first you should "study" as many 147s as you can with lowering spings and 16" Selespeeds and decide if you like what you see, and not just rely on what you imagine that it will look like.
If you go for lowering, then a combination of HR+B8 will give you a less comfort but not harsh ride. The HR is not a hard spring, and you can really feel that by driving a 147 with HR and stock shocks. B6s are not soft, but they re not hard either. Do note that you WILL feel the road unevenesses but it will pass over them in a sweet way, filtering very well the road noises and not passing any knocks inside the cabin (and thats with the 17"). The 55 profile tyres will help more on this too. The Bilsteins are very quiet shocks, i cant remember my bella being more suspension noise - free than ever, even with the stock shocks, but this doesnt mean that the ride is comfort like the stock setup. The suspension travel is reduced by 3.5cm and
no matter how progressive the springs are or how good the shocks are, the travel is short, so the comfort is quite reduced. I still havent had the chance to travel with high speeds and see it on the high way, but it looks promising.
ABout performance, I cant tell you if the HR+B8 is absolutely better that the stock suspension or not. It surely feels like its much better,
very stable at cornering, giving a very safe feeling even when exceeding the grip limits. But feeling is one thing, absolute numbers is another.
I guess that only a professional driver in a track, having measuring equipment, can tell if one suspension is really better than another. Same goes
for comparing the HR+B8 with Eibach+Koni or any other setups. I m having difficulties on believeing people who say that they can take corners with 10 or 20 km/h faster with their new suspension. How can they tell, the road, the temperatures and a dozen conditions are different each time.. This conclusion can only be certain when
it comes from a professional imho.
Note that whatever you choose, there is no coming back. If you get B6 to fit them with your standard springs, you cant use them with lowering
springs in the future (B6 allow only 2cm of lowering, beyond that limit they bottom out as it is mentioned, check the FAQ at their web site). Same goes
for the B8, if you get the B8s with lowering springs, you wont be able to use them with the standard springs in the future if you decide to do so.
The black B4 Bilsteins can be used with both types of spirngs, but the yellow bilsteins cant.