[ZM2]

Originally Posted by TProfit

Bumping an old thread but ... doesn't seem that a resolution was made.

What option would you go with for:
1)Softest ride/comfort
2)Stance (nice drop)
3)Handling

But what I'd reallywant is this:
https://f87.bimmerpost.com/forums/sh....php?t=1478200

Without tracking down custom springs rates on various coil over setups, I believe the most compliant off the shelf solution is Dinan. The springs rates are minimally increased, and since they’re linear the car is more comfortable over small bumps (removes the stock progressive spring bounciness) and only slightly harsher over big bumps.

I was able to drop 20mm in the rear and 15mm in the front (rear rake track setup) without comfort impact.

Handling is much better. Much less dive, squat, and roll, and I can still attack the curbs on track.

[ronin1k]

Originally Posted by ZM2

Without tracking down custom springs rates on various coil over setups, I believe the most compliant off the shelf solution is Dinan. The springs rates are minimally increased, and since they’re linear the car is more comfortable over small bumps (removes the stock progressive spring bounciness) and only slightly harsher over big bumps.

I was able to drop 20mm in the rear and 15mm in the front (rear rake track setup) without comfort impact.

Handling is much better. Much less dive, squat, and roll, and I can still attack the curbs on track.

are you using this setup on track? I would be really interested to know how these spring affect handling when pushing to the limits

[ZM2]

Originally Posted by ronin1k

are you using this setup on track? I would be really interested to know how these spring affect handling when pushing to the limits

I am, with lots of track days on it. While it’s not as stiff other options for the track, I’ve only ever thought the Dinan setup could be a little stiffer in a few high load corners. I think stiffer sway bars would be the proper fix for that, tho, vs more spring. The best part is that daily driving overall is more comfortable, while handling dynamics on track is much better.

This won’t be a popular opinion here: a lot of guys like to run stiff setups on track, but suspension setup is always a compromise. Stiffer helps in some corners, but hurts in others, plus you lose time by not being able to use the curbs as much. You also spend a bunch of time fiddling with damper and bar settings, and thinking about spring rates, when you should be focused on where your driving sucks on track and could be better.

I use my M2 for a fun track day car and to learn new tracks. I hop in the race car when it’s time to get serious and start playing with suspension setup on track.

[ronin1k]

@ZM2 appreciate your feedback, I know stiffer is not always = better performance wise, I would consider Dinan coilovers as an upgrade to stock as long as it generally benefits performance of the suspension while driving close to the limits, from my experience with E46 M3, most of the coilovers will sacrifice comfort while shorted springs + stock shocks will sacrifice performance, for instance one the favorite choises for well rounded setup among e46 community was a combo of Koni/Bilstein shocks and Dinan springs

[QM]

Just installed Dinan HAS today. Can't speak for the track but initial impression on the street is that there so far appears to be no degradation in comfort. Instead, I would agree with ZM2 that this setup actually makes the car more compliant and more comfortable at least over small and medium bumps. There is generally less bounciness. Definitely less body roll in tight corners. I'm lowered 1" front and 3/4" rear on stock 19's.

[Saanen]

I am running the Ohlins with 80 N/mm front and 160 N/mm rear and at 20 clicks it is still more firm than stock....but really super planted and no more bounce over larger road undulations....awesome. On the track I ran them at 3 clicks all the way around...again awesome.
If you want softer than stock you may need to go 70/140 which is about as soft as Ohlins recommends given the valving.

[atlas]

https://f87.bimmerpost.com/forums/sh....php?t=1463804

[DrKevM5]

The Dinan coilover conversion is magical

[QM]

Originally Posted by DrKevM5

The Dinan coilover conversion is magical

Did your front height settle at all after the install? I'm supposed to be lowered 1" upfront but still seems like it should be a bit lower. I'm wondering whether I should expect it to settle or whether it's not actually at 1". It's only been a bit over week.

[chief1richard]

Originally Posted by ZM2

I am, with lots of track days on it. While it’s not as stiff other options for the track, I’ve only ever thought the Dinan setup could be a little stiffer in a few high load corners. I think stiffer sway bars would be the proper fix for that, tho, vs more spring. The best part is that daily driving overall is more comfortable, while handling dynamics on track is much better.

This won’t be a popular opinion here: a lot of guys like to run stiff setups on track, but suspension setup is always a compromise. Stiffer helps in some corners, but hurts in others, plus you lose time by not being able to use the curbs as much. You also spend a bunch of time fiddling with damper and bar settings, and thinking about spring rates, when you should be focused on where your driving sucks on track and could be better.

I use my M2 for a fun track day car and to learn new tracks. I hop in the race car when it’s time to get serious and start playing with suspension setup on track.

Are these the adjustable coilover springs on the Dinan web site, or just none adjustable springs? I am thinking of doing the same to my car. Do you have the part #s. I want to add camber plates, and slightly lower car. Will be getting 265/18/35 dedicated wheels.

[ZM2]

Originally Posted by chief1richard

Are these the adjustable coilover springs on the Dinan web site, or just none adjustable springs? I am thinking of doing the same to my car. Do you have the part #s. I want to add camber plates, and slightly lower car. Will be getting 265/18/35 dedicated wheels.

Height adjustable. They only offer one set for the M2.

[DrKevM5]

Originally Posted by QM

Did your front height settle at all after the install? I'm supposed to be lowered 1" upfront but still seems like it should be a bit lower. I'm wondering whether I should expect it to settle or whether it's not actually at 1". It's only been a bit over week.

After one year

[Daleb]

I run the Bilstein PSS10’s on mine. I like that compression and rebound are both adjusted with one adjustment knob opposed to 2 separate ones like the KW V3’s I ran on my last car. From another memeber I believe the spring rates are around 500 F and 800 R on the Bilstein.

Both are great coilovers and can get you where you need comfort wise. I’ve found on both that the car is technically firmer however due to the better matched damper/spring they work much better together and offer better compliance which in turn gives a certain amount of comfort.

[CJW2OO4]

I like the fact that the Dinan kit has the warranty but I wish the drop was a little bit more.