BMW M Performance Suspension (HAS height adjustable sleeve over kit)

[parabmw]

Does the m4 with EDC require a specific type of or special tool for an alignment?

[Rockshaker]

Here's my before and after pics.




I measured the front at 608 mm and rear at 598 mm. The front has a one finger gap and the rear has 5 mm clearance from the top of tire to the fender and 2 inches to the fender to sidewall.

[E46M3forRay]

Does anyone know the spring rate on the MP Has kit and the CS? I’m looking into installing this on my M3 CS.

[Maitre_Absolut]

Originally Posted by E46M3forRay

Does anyone know the spring rate on the MP Has kit and the CS? I’m looking into installing this on my M3 CS.

We are a few with MP HAS on the CS. No spring rates available. It rides like stock, do it.

[moonluv810]

I installed this kit on my '18 ZCP M3 about 3 weeks ago. I've tweaked the ride height several times and I think I've settled with a good compromise between getting rid of the 4x4 look and staying conservative for a daily driver.

BMW recommended height 633mm in the front and 626mm in the rear. I ended up with 631mm in the front and 615mm in the rear. I thought the recommended ride height made the car look like it's nose diving.

[figure99]

Originally Posted by moonluv810

I installed this kit on my '18 ZCP M3 about 3 weeks ago. I've tweaked the ride height several times and I think I've settled with a good compromise between getting rid of the 4x4 look and staying conservative for a daily driver.

BMW recommended height 633mm in the front and 626mm in the rear. I ended up with 631mm in the front and 615mm in the rear. I thought the recommended ride height made the car look like it's nose diving.

Looks great. I'm currently at 628mm front and 622mm rear... think I need to go at least 5 mm lower in the rear. I agree it looks much better slightly lower than BMW recommended. Plan on getting to it soon now that the weather is getting better.

https://www.bimmerpost.com/forums/sh...php?p=23882452

[moonluv810]

Originally Posted by figure99

Looks great. I'm currently at 628mm front and 622mm rear... think I need to go at least 5 mm lower in the rear. I agree it looks much better slightly lower than BMW recommended. Plan on getting to it soon now that the weather is getting better.

https://www.bimmerpost.com/forums/sh...php?p=23882452

With lowering the rear more than the front, I feel that the car looks "flatter" rather than front rake.

I was really tempted to lower the car a bit more but even with my current ride height (631mm front, 615mm rear) and MP front lip, I scraped a couple times already.

[EricSMG]

Originally Posted by moonluv810

I installed this kit on my '18 ZCP M3 about 3 weeks ago. I've tweaked the ride height several times and I think I've settled with a good compromise between getting rid of the 4x4 look and staying conservative for a daily driver.

BMW recommended height 633mm in the front and 626mm in the rear. I ended up with 631mm in the front and 615mm in the rear. I thought the recommended ride height made the car look like it's nose diving.

Nice work.

Totally agree that too much forward rake doesn't look good (which is funny as most everyone goes for max rake).

[Maitre_Absolut]

Originally Posted by Maitre_Absolut

Parts are in!

This kit seems much more complete than the KW HAS kit I had on my S4, which was only a spring with the adjustable collar. Is the KW kit for the M3 really identical to this (spring rates aside)? Noticeable difference with my prior KWs is the rears have a rubber piece that sits between the spring and collar. The front has the helper spring, is the M3 stock that way too? The plastic piece on the rear spring, is that there to prevent noise when the spring compresses?

I don't see a set screw for the fronts. How does the height stay in place?

What is the large cylinder piece for? Something for installation I presume?

The parts outside the box were part of the recommended hardware kit that I got, as per BMW instructions when ordering this.

This gets installed Friday

Here are some pics with 12/10mm spacers. Height is about 610/620 F/R. Plenty of room to go down in rear. I like the even tire gap but overall looks like rake.

[x.shell]

Originally Posted by Maitre_Absolut

Here are some pics with 12/10mm spacers. Height is about 610/620 F/R. Plenty of room to go down in rear. I like the even tire gap but overall looks like rake.

What a perfect set up.

[shay2nak]

Perfect

[A47]

Originally Posted by CanAutM3

That's nuts. I paid $625CAD ($465USD) for 5 hours of install and $150CAD ($112USD) for alignment at my dealer before taxes. My dealer also included the installation of the GC camber plate in the deal.

All in all, my installed MP-HAS kit cost me $2,992CAD ($2,233USD) including 15% taxes. Not cheap, but definitely worth it to me.

Hi,how did the HAS kit affect the ride of your car?As I understand they are progressive springs,I guess it would be hard to compare the rate to the stock spring.Thanks

[wheelhouse]

Originally Posted by NOLATom

Anyone have the M Perfromance HAS with he Dinan front sway bar? I brought my car to BMW to have the Dinan and M Performance components installed and then a week later brought it to a race shop around the corner to have the car aligned for negative camber and corner balanced. While it was there, they told me they adjusted my sway bar to the stiffest setting. After leaving the shop I could hear a ton of rattling, so I put the car on a lift and found the links to be loose for one and obviously not correctly setup to the point where it actually hit the lower control arm upon extension of the springs when the car was lifted. I had someone I trust look at it and they called Dinan to see what the actual link should be set to and they told him they never did a setup with the MPHAS, so has anyone else went through this and came up with a correct setting?

Thanks for any feedback!

What did you do to fix this? It's like the arms are too long now. Thank you in advance.

[vasi_M3]

Anyone with GC camber plates experienced limitations with setting ride height on HAS springs to BMW spec? My shop could only get 628mm in front(not 633) apparently due to the camber plates. My front camber is about -3.5.

Anyone else heard of this issue?

[RevNev]

Originally Posted by moonluv810

BMW recommended height 633mm in the front and 626mm in the rear. I ended up with 631mm in the front and 615mm in the rear. I thought the recommended ride height made the car look like it's nose diving.

The BMW recommended ride heights will have the roll centre taken into consideration and "roll centre" is theoretical pivot point of the car leaning left and right. The lower the car, the lower the roll centre and the more the body will roll with a given spring rate. Running the rear lower will soften the rear suspension and induce understeer. It's likely that the recommended ride heights maintains the suspension geometry it's designed for and provides the roll centre's that results in optimum handling balance with the spring rates supplied.

Although the HAS is good for cosmetic enhancement, if it doesn't handle well on a race track, the ride heights are possibly outside the recommendations.

[Gsv77]

Originally Posted by RevNev

The BMW recommended ride heights will have the roll centre taken into consideration and "roll centre" is theoretical pivot point of the car leaning left and right. The lower the car, the lower the roll centre and the more the body will roll with a given spring rate. Running the rear lower will soften the rear suspension and induce understeer. It's likely that the recommended ride heights maintains the suspension geometry it's designed for and provides the roll centre's that results in optimum handling balance with the spring rates supplied.

Although the HAS is good for cosmetic enhancement, if it doesn't handle well on a race track, the ride heights are possibly outside the recommendations.

Mineral white 2018 f80 M3 ZCP

BMW HAS Suspension (recommended height)

BBS FI-R 20x9.5 et 23; 20x10.5 et 35

Michelin Pilot Sport 4S 265/30 and 285/30

[allinon72]

Are you sure that's recommended height? Looks awfully low.

[Gsv77]

Originally Posted by allinon72

Are you sure that's recommended height? Looks awfully low.

Yes, had an independent shop install them then had BMW do an alignment/ ride height adjustment.

The wider wheels and 4s's fill in the wheel wells a little more than 666m's and PSS's in my experience.

No rubbing, no scraping and rides perfectly.

[9PointStar]

Is this Canadian pricing? Where did you order it from?

Originally Posted by Maitre_Absolut

Here it is.

Looking at the instructions, it seems I don't have the spanner wrenches included in the MP HAS kit? There should be 2 different ones, front and rear I assume. For those that have MP HAS, was this included?

[CanAutM3]

Originally Posted by RevNev

The BMW recommended ride heights will have the roll centre taken into consideration and "roll centre" is theoretical pivot point of the car leaning left and right. The lower the car, the lower the roll centre and the more the body will roll with a given spring rate. Running the rear lower will soften the rear suspension and induce understeer. It's likely that the recommended ride heights maintains the suspension geometry it's designed for and provides the roll centre's that results in optimum handling balance with the spring rates supplied.

Although the HAS is good for cosmetic enhancement, if it doesn't handle well on a race track, the ride heights are possibly outside the recommendations.

Lowering a car very rarely results in more roll when cornering. It’s actually the opposite, where lowering lessens roll.

It's actually a fair bit more complicated than just the roll center. It also has to do with weight transfer. Lowering a car reduces the amount of weight transfer during cornering which improves total grip and reduces the forces that roll the car. For a car to roll more as a result of lowering, the effect of the roll center displacement relative to the center of gravity needs to be greater than the effect of the reduced weight transfer, and this is very rarely the case.

As for the effect of lowering on the handling balance (over/understeer), it mostly has to do with weight transfer and not with "making it softer". Lowering the rear results in less weight transfer on the rear axle during cornering, which in turn improves total grip on that axle that results in more understeer. This is why it is beneficial to lower a car, because it improves total grip. However, chaging the amount of roll on one axle relative to the other also impacts the handling balance, because if one axle rolls more, the other will suffer greater weight transfer because it is the one resisting the roll.

[Maitre_Absolut]

Originally Posted by 9PointStar

Is this Canadian pricing? Where did you order it from?

My dealer.

[vasi_M3]

Hey guys,

Im on MPHAS and need to drop the rear about 5mm. Can I do that without having to do an alignment?