H&R springs or Eibach springs?

[0-60motorsports]

Eibach all the way! the H&R's are a nightmare of harshness LOL

[Nate047]

looks very good ! I am not looking for a coilover slammed look. Too old for that. Just want a mild drop with 1 finger wheel gap all around. OEM + look

I would do Eibach with a B8 or similar shock.

RE: what you said about the Mason brace adding to the rear stiffness, that brace won’t really affect how the car feels over bumps and pot holes etc… That’s more the spring and damper.

[Nate047]

Do your eibach coilovers have linear or progressive springs ? Progressives will give you slightly better ride but will compromise on handling.

I can’t speak for other springs but I recently put on swift linear springs on my KW coilovers and I love how they feel. Firm yet smooth. That being said if you hit a pothole or really bad road you will definitely feel it. They are linear springs.

Which sizes and rates did you go with? I’m toying with the idea of trying linear springs on my Clubsport dampers maybe sometime in the next year.

[Maxima SE]

I would do Eibach with a B8 or similar shock.

RE: what you said about the Mason brace adding to the rear stiffness, that brace won’t really affect how the car feels over bumps and pot holes etc… That’s more the spring and damper.

Why the B8 over the Koni?

[maupineda]

There is no B8 for E46 M.

[Maxima SE]

There is no B8 for E46 M.

They make the B6 which is included with the eibachs in the B12 pro kit. There is another thread with comparison pics of B12 kit and Koni/Eibach and the B12 sits a little higher. Koni/Eibach is the way to go.

[EthanolTurbo]

They make the B6 which is included with the eibachs in the B12 pro kit. There is another thread with comparison pics of B12 kit and Koni/Eibach and the B12 sits a little higher. Koni/Eibach is the way to go.

That makes no sense as the B12 kit is just the Konis and Eibach Pro Kit springs packaged together. They're the exact same thing.

[maupineda]

don't shoot the messenger, I know there are B12 kits, which by definition have B8 shocks (shorter), but the M cars being already lower v non M, the B12 kits are just lower springs + B6. which is idiotic as they are taking bump travel away.

[Nate047]

Correction, they were B6, not B8. My bad.

[Maxima SE]

That makes no sense as the B12 kit is just the Konis and Eibach Pro Kit springs packaged together. They're the exact same thing.

No. B12 is Bilstein shocks and eibach. https://www.turnermotorsport.com/p-2...nsion-package/

The Koni kit is Koni yellows and Eibach. https://www.turnermotorsport.com/p-5...e-convertible/


This post shows how the B12 sits higher than Koni's

1st is Koni/eibach. Then koni rear B12 front. Then B12

https://nam3forum.com/forums/forum/main-forum/e46-2001-2006/71642-my-review-koni-yellows-eibach-springs-on-a-daily-driven-m3?p=76772#post76772

[EthanolTurbo]

No. B12 is Bilstein shocks and eibach. https://www.turnermotorsport.com/p-2...nsion-package/

The Koni kit is Koni yellows and Eibach. https://www.turnermotorsport.com/p-5...e-convertible/


This post shows how the B12 sits higher than Koni's




https://nam3forum.com/forums/forum/m...6772#post76772

Sorry, I read your post wrong. I thought it said the B6 Shocks and Eibach springs are different than the B12 kit.

[Leafsrule531]

Which sizes and rates did you go with? I’m toying with the idea of trying linear springs on my Clubsport dampers maybe sometime in the next year.

I ended up going with the following based on recommendations from swift. 559 lbs is a bit on the higher side for a street car but my ride is still pretty smooth yet firm. It does hit hard though when you do end up hitting a bad pothole but overall I am very happy with switching over. long story short, I had to switch to these springs to install my ground control camber plates.

https://motorsportsammo.com/products/swift-metric-coilover-spring-id-60mm-7-length?_pos=1&_sid=0a0499450&_ss=r&variant=37833239492

[dukeofchen]

I've asked before but figure it might get more traction in this thread. Since the reduction in travel from lowering on Eibachs rides the bump stops more, jacking up the progressive spring rate, wouldn't it seem that slightly trimming the OE bump stops would alleviate the issue, assuming you remain safely within the limits of the Koni shock? Apparently back in the day Dinan offered pre-trimmed bump stops with their kit, but it seems the measurements have been lost with time.

And if so, how would you guys think about determining that safe limit? I presume the amount to trim would be less than the actual difference in ride height.

[cobra]

I've asked before but figure it might get more traction in this thread. Since the reduction in travel from lowering on Eibachs rides the bump stops more, jacking up the progressive spring rate, wouldn't it seem that slightly trimming the OE bump stops would alleviate the issue, assuming you remain safely within the limits of the Koni shock? Apparently back in the day Dinan offered pre-trimmed bump stops with their kit, but it seems the measurements have been lost with time.

And if so, how would you guys think about determining that safe limit? I presume the amount to trim would be less than the actual difference in ride height.

The spring rate and progression stays the same as you lower it. Depending on where you're sitting in the spring rate curve, this may or may not make a real difference.

There are different theories about how to use your bump stop. You can use a long polyurethane bump stop and rely on it as part of your spring rate to create sort of a progressive spring, or you can run a short stiff bump stop that you won't encounter during normal driving. It's merely to prevent a harsh crashing of metal parts. By cutting a soft/stock bump stop, you do run the risk of some harsher bottom out events because it won't do much. Bry5on did some experiments here on his Dinan setup and advised against shortening the bump stops.

I personally prefer a shorter stiffer bump stop for a more linear feel and making sure the springs are stiff enough, but know that once you use up your travel you will feel a notable change.

[Maxima SE]

What bump stops are recommended with Koni yellow and eibach ?