[slicer]

Originally Posted by FrozenGT

Most people reading this will probably get upset-

But don't go and throw Jenkee springs on your $90,000 car expect the vehicle to perform the way that it was developed to. If you can afford $90,000 for a vehicle you should be able to afford a proper spring adjustment height kit.

I'm telling you you're going to ruin your adaptive dampers using springs that were not developed for this car. The only kit that I would trust is the MPERFORMANCE HAS Kit. If you look up the part numbers the M2CS has the identical adaptive dampers from the M3/M4/M4CS.

This is why I would never buy a used M car because you never know the Jenkee things that have been done to them!

I would like to offer a counter point to this perspective. I think the only true, proper way to improve the suspension is to get proper coilovers. That is the route I will be going.

In my opinion a HAS kit is no better than a lowering spring, and in fact opens up the potential to be worse. The HAS allows you to lower the car even further than a typical lowering spring. Thereby further reducing suspension travel and often taking it to the point of riding on the bump stops. The only real advantages to a HAS kit is that it allows you to dial in your desired ride height and corner balance. However, they add complications. Going too low is a problem and they reduce inner wheel clearance. I would seek a lowering spring that is in the height range that I like, a spring rate that is decently matched to the shocks and isn't so low that it rides on bump stops. I have repeatedly seen people slamming their car with HAS kits causing more damage to the dampers than any lowering spring.

[michaeldorian]

Originally Posted by slicer

I would like to offer a counter point to this perspective. I think the only true, proper way to improve the suspension is to get proper coilovers. That is the route I will be going.

In my opinion a HAS kit is no better than a lowering spring, and in fact opens up the potential to be worse. The HAS allows you to lower the car even further than a typical lowering spring. Thereby further reducing suspension travel and often taking it to the point of riding on the bump stops. The only real advantages to a HAS kit is that it allows you to dial in your desired ride height and corner balance. However, they add complications. Going too low is a problem and they reduce inner wheel clearance. I would seek a lowering spring that is in the height range that I like, a spring rate that is decently matched to the shocks and isn't so low that it rides on bump stops. I have repeatedly seen people slamming their car with HAS kits causing more damage to the dampers than any lowering spring.

What springs are you planning on going with?

[GimmeanM]

Originally Posted by slicer

I would like to offer a counter point to this perspective. I think the only true, proper way to improve the suspension is to get proper coilovers. That is the route I will be going.

In my opinion a HAS kit is no better than a lowering spring, and in fact opens up the potential to be worse. The HAS allows you to lower the car even further than a typical lowering spring. Thereby further reducing suspension travel and often taking it to the point of riding on the bump stops. The only real advantages to a HAS kit is that it allows you to dial in your desired ride height and corner balance. However, they add complications. Going too low is a problem and they reduce inner wheel clearance. I would seek a lowering spring that is in the height range that I like, a spring rate that is decently matched to the shocks and isn't so low that it rides on bump stops. I have repeatedly seen people slamming their car with HAS kits causing more damage to the dampers than any lowering spring.

MP HAS or KW HAS? The MP kit is different from the KW kit in spring rates and a limited collar that prevents lowering too much.

[slicer]

Originally Posted by michaeldorian

What springs are you planning on going with?

I'm not doing springs on this car.

I will be testing a few different coilovers kits:
Ohlins R&T standard
Ohlins R&T with custom springs

Moton 2-way
Ohlins TTX 2-way

That being said I have had great results with HR springs on my daily drivers. Currently have them on my X3M and previously used them on my F31 330i with good results on both.

[slicer]

Originally Posted by GimmeanM

MP HAS or KW HAS? The MP kit is different from the KW kit in spring rates and a limited collar that prevents lowering too much.

My option applies to either one. However I agree that the BMW version is the better of the two.

[ScullyD]

Originally Posted by Davil

Yes. "Stance" over handling. I'll never get it. Maybe because I am over 30 and actually like taking corners.

Yeah I'm in this camp. The reason the car is sought after is because of the handling, and then lowering negates that at some level. So I don't really get the appeal of it.

[slicer]

Originally Posted by ScullyD

Yeah I'm in this camp. The reason the car is sought after is because of the handling, and then lowering negates that at some level. So I don't really get the appeal of it.

There is a ton of room for improvement with the car's handling. Stock suspension is nice but pedestrian standards, required snow chain clearance, and generally conservative OE setup is designed to please the masses. Additionally if you have any desire to track the car, the shortcomings will be amplified. OE camber will kill the outer edge of the front tires in one or two fast 20 minute track sessions. If you are part of the masses that desires a conservative setup then consider yourself fortunate. Taking the car to the next level is not cheap. I agree that 1/2 a$$, compromised, "stance" driven alterations make no sense given that this car is very nicely setup out of the box.

[kyrocks]

Originally Posted by ScullyD

Yeah I'm in this camp. The reason the car is sought after is because of the handling, and then lowering negates that at some level. So I don't really get the appeal of it.

Man, you guys think the handling of the CS is perfect??? Have you driven other cars? I'm not saying it's bad, but there is definitely room for improvement. It's always going to be a battle between those who swear that BMW OEM Is perfect versus those who like to do some modifications. Both are okay. Some people are afraid to mod. Some people can't afford to mod especially if they think the warranty is void. I get it. However, saying that you ruin handling by lowering a car is a vague generalized statement with no substance. I personally think my lowered M Perf HAS with proper alignment corners better than the original setup. Each to his own. I don't put down those who keep it stock.

[ScullyD]

Originally Posted by kyrocks

Man, you guys think the handling of the CS is perfect??? Have you driven other cars? I'm not saying it's bad, but there is definitely room for improvement. It's always going to be a battle between those who swear that BMW OEM Is perfect versus those who like to do some modifications. Both are okay. Some people are afraid to mod. Some people can't afford to mod especially if they think the warranty is void. I get it. However, saying that you ruin handling by lowering a car is a vague generalized statement with no substance. I personally think my lowered M Perf HAS with proper alignment corners better than the original setup. Each to his own. I don't put down those who keep it stock.

I never said the handling was perfect, and i never said lowering ruins the handling. I'm merely saying, the defining characteristic compared to the M2C is how the M2 CS handles combined with the ride quality from the adaptive dampers. I do believe lowering could negate the ride quality to handling balance of the car.

I personally have no desire to find out if it does or doesn't, and will be leaving my car stock. Not tracking my car either, its meant as a backroads car.

[michaeldorian]

What are ya'll thoughts on doing just something modest like 10mm-15m using something like this...

MSS F87 M2 Height Adjustable Spring Kit

https://ind-distribution.com/product...ble-spring-kit

Thoughts on the MSS stuff?

[Ilikemike]

Originally Posted by michaeldorian

What are ya'll thoughts on doing just something modest like 10mm-15m using something like this...

MSS F87 M2 Height Adjustable Spring Kit

https://ind-distribution.com/product...ble-spring-kit

Thoughts on the MSS stuff?

Based on the replies I've had so far, in summary, I think the H&R springs are the way to go, not the adjustable (M perf.) type, 2cm drop is modest at best but will improve the looks and POSSIBLY the handling or at least not significantly change those dynamics. The coilover solution is fine if you're tracking and $$$ is not an issue.

[michaeldorian]

Interesting. Apparently there is a different part number for M2 CS H&R springs now?

[michaeldorian]

Looks like H&R 28802-1 is for M3, M4. and M2 Adaptive Suspension and 28802-5 is for M2, M2C standard...

But oddly 28802-1 is listed as a Super Sport Spring for the M3 and M4
Lowering Specs:
Front - 1.6"
Rear - 1.0"

but Sport Spring for M2 CS

F87 M2 Competition Lowering Specs:
Front - 1.0"
Rear - 0.8"

https://www.hrsprings.com/applicatio...e/4/Suspension

[mfarrzhp]

Originally Posted by michaeldorian

Looks like H&R 28802-1 is for M3, M4. and M2 Adaptive Suspension and 28802-5 is for M2, M2C standard...

But oddly 28802-1 is listed as a Super Sport Spring for the M3 and M4
Lowering Specs:
Front - 1.6"
Rear - 1.0"

but Sport Spring for M2 CS

F87 M2 Competition Lowering Specs:
Front - 1.0"
Rear - 0.8"

https://www.hrsprings.com/applicatio...e/4/Suspension

Interesting. I put the 28802-5 springs on my M2CS and they work just fine with the adaptive suspension. The quoted ride height change seems accurate on my car.

It makes it look just right, any lower and I'd surely be scraping out of my driveway.

[Ilikemike]

Originally Posted by michaeldorian

Looks like H&R 28802-1 is for M3, M4. and M2 Adaptive Suspension and 28802-5 is for M2, M2C standard...

But oddly 28802-1 is listed as a Super Sport Spring for the M3 and M4
Lowering Specs:
Front - 1.6"
Rear - 1.0"

but Sport Spring for M2 CS

F87 M2 Competition Lowering Specs:
Front - 1.0"
Rear - 0.8"

https://www.hrsprings.com/applicatio...e/4/Suspension

But the lowering spec on the M2 CS is
identical to the M2 C
F87 M2 Competition Lowering Specs:
Front - 1.0"
Rear - 0.8"

[michaeldorian]

According to this thread. the M2 CS spring part numbers are exactly the same as the M2C.

https://f87.bimmerpost.com/forums/sh...90&postcount=1

The coil spring part # for the the M2 CS,
Spring Front: 31337853271, shared with M2/M2 LCI/M2 Competition
Spring Rear: 33537853275, shared with M2/M2 LCI/M2 Competition

And of course EDC are carried over from the F80/82/83, albiet having a different tuning,
Spring strut, EDC, front left : 31318008627
Spring strut, EDC, front right : 31318008628
Shock absorber for EDC, rear left: 33528008629
Shock absorber for EDC, rear right: 33528008630

[3t3p]

I find it interesting some feel the M2 is really high stock..looks great to me maybe 1-2cm less.

See VW for stock ride heights and really you will see the SUV effect!

[michaeldorian]

Originally Posted by 3t3p

I find it interesting some feel the M2 is really high stock..looks great to me maybe 1-2cm less.

See VW for stock ride heights and really you will see the SUV effect!

Ha. Yeah, looking just for 10mm / 1cm.

[medphysdave]

Is anyone that's lowering their stance using a "diff lift" kit. I was watching a video by Misha charoudin. They modified their OG M2. They should this kit and the logic made sense to me. It seems to correct the geometry from lowering. They also slid mounted the diff etc. I wonder if the CSR has this?

https://f87.bimmerpost.com/forums/sh....php?t=1834869

[chris719]

Originally Posted by kyrocks

Man, you guys think the handling of the CS is perfect??? Have you driven other cars? I'm not saying it's bad, but there is definitely room for improvement. It's always going to be a battle between those who swear that BMW OEM Is perfect versus those who like to do some modifications. Both are okay. Some people are afraid to mod. Some people can't afford to mod especially if they think the warranty is void. I get it. However, saying that you ruin handling by lowering a car is a vague generalized statement with no substance. I personally think my lowered M Perf HAS with proper alignment corners better than the original setup. Each to his own. I don't put down those who keep it stock.

It might corner better on a good road, but you are making some trade-offs for that. Obviously, it's fine, but on a car this expensive I would just do it the right way with coilovers where you know what you're getting.

The engineers didn't deliver the car like that from the factory for a reason. I don't think BMW is always perfect, but I do think without knowledge of the reasons that went into their decisions it is sometimes difficult to say what is a good idea and what is not. In this case, it's fairly standard to assume the overall impact is slightly negative and could wear the dampers faster. Lowering springs always take the system out of the range it was designed for. Not a big deal, but I'm sure it's worse than stock over really bad surfaces.

[ptgltw]

Originally Posted by medphysdave

Is anyone that's lowering their stance using a "diff lift" kit. I was watching a video by Misha charoudin. They modified their OG M2. They should this kit and the logic made sense to me. It seems to correct the geometry from lowering. They also slid mounted the diff etc. I wonder if the CSR has this?

https://f87.bimmerpost.com/forums/sh....php?t=1834869

Lowering the car 3/4" won't need this part. Lowering it to CSR specs likely would need to have something changed.

I'm just guessing but the kinematics on BMW Motorsport cars are totally different and wouldn't need an after market diff lift kit.

[medphysdave]

Originally Posted by ptgltw

Lowering the car 3/4" won't need this part. Lowering it to CSR specs likely would need to have something changed.

I'm just guessing but the geometry on BMW Motorsport cars are totally different and wouldn't need an after market diff lift kit.

What's the diff lift kit look like?

Hard to explain what it looks like. There is an active thread in the suspension setting showing more detailed pics. Someone bought it and had it installed. Looks like a high cost install since the diff has to be dropped.