Are the M Performance HAS and KW HAS identical?

[JcLusso]

Has anyone confirmed this yet? I've reached out to numerous vendors non of which can confidently confirm if the KW HAS is identical to the M Performance HAS besides the obvious color. I know they updated the KW HAS around the same time of release and I'm currently torn between spending 2x for what may be the same exact thing. If anyone has had both and can confirm noticing any differences that would be greatly appreciated.

[ObiChen]

I'm curious too

[jstnstr]

Not gonna be the "YOU NEED TO SEARCH" guy but... found this with a search and it probably answers your question:

http://f80.bimmerpost.com/forums/sho....php?t=1384481

[JcLusso]

Originally Posted by jstnstr

Not gonna be the "YOU NEED TO SEARCH" guy but... found this with a search and it probably answers your question:

http://f80.bimmerpost.com/forums/sho....php?t=1384481

Originally Posted by jstnstr

Not gonna be the "YOU NEED TO SEARCH" guy but... found this with a search and it probably answers your question:

http://f80.bimmerpost.com/forums/sho....php?t=1384481

I know everything from that thread. I basically am looking to confirm spring rates. Surprising nobody has just measured them by now on some machine that can apply force or maybe that's not that easy to do....

Also the thread mentions the guy in the MP HAS gigantic thread who says he went from KW. He didn't post if he had the original or v2.

[jmr0311]

Is there a part number for KW's that can be used to identify if it's V2 or not?

[SanchoDivine]

Originally Posted by jmr0311

Is there a part number for KW's that can be used to identify if it's V2 or not?

You can tell by the front perches. If they look similar to the MP HAS then that is v2 (I believe KW is black and purple). If they are brass colored with a bigger purple screw than those are v1.

[jaspercasidino]

Does anyone know if there is a ride quality different between the KW HAS and M Performance HAS? Spring rate differences? Would like to get the KW system and some spacers for the same price or less as the M Performance system.

[LOW4LYF]

Originally Posted by jaspercasidino

Does anyone know if there is a ride quality different between the KW HAS and M Performance HAS? Spring rate differences? Would like to get the KW system and some spacers for the same price or less as the M Performance system.

Yes, different spring rates

[allinon72]

I don't think the MP HAS spring rates are public, but just from testimonials of both kits, they are most certainly different. The KW seems to be more aggressive and rougher. Spring design is different. MP HAS ride quality is damn near perfect and highly recommended IMO.

[JcLusso]

Originally Posted by jaspercasidino

Does anyone know if there is a ride quality different between the KW HAS and M Performance HAS? Spring rate differences? Would like to get the KW system and some spacers for the same price or less as the M Performance system.

I had the first version of the KW kit back in 2015 and it was most definitely different. I've heard now the new updated version is the same but spring rates aren't confirmed last I checked.

[jaspercasidino]

Originally Posted by JcLusso

I had the first version of the KW kit back in 2015 and it was most definitely different. I've heard now the new updated version is the same but spring rates aren't confirmed last I checked.

Thanks for the reply! I've seen the newer version of the KW kit and it does look pretty much the same as the M Performance kit aside from the colors. Can't tell spring rates or other nuances through pictures though!

[Maitre_Absolut]

There are many differences, not similar at all.

Go with MP HAS

[LOW4LYF]

Originally Posted by Maitre_Absolut

There are many differences, not similar at all.

Go with MP HAS

KW V2 HAS is almost identical with the MP except spring rates.

[JcLusso]

I have MP HAS second time around. Much better than KW HAS was but like I said I had v1 in 2015 right when it came out. Not sure how much was the refinements between 2015 and 2018 M3 and the kit though.

[jaspercasidino]

Thanks for the replies everyone! I was also doing some more searching and I came across a huge thread and there as another guy who switched from KW to M Performance. He seemed quite pleased with the change. Sounds like M Performance is the way to go! Thanks again!

[matty088]

I read that mp has has nearly Identical spring rates to ZCP. Kind of a bummer. Would hope to firm up the ride. Lowering the car at this price point without an increase in handling seems foolish.

[allinon72]

Originally Posted by matty088

I read that mp has has nearly Identical spring rates to ZCP. Kind of a bummer. Would hope to firm up the ride. Lowering the car at this price point without an increase in handling seems foolish.

Multi-page thread with testimonials disagrees with your assessment.

[CanAutM3]

Originally Posted by matty088

I read that mp has has nearly Identical spring rates to ZCP. Kind of a bummer. Would hope to firm up the ride. Lowering the car at this price point without an increase in handling seems foolish.

I had also read the same, but I don't believe ir is true. The MP-HAS have a progressive spring rates on the front spring whereas the Comp pack springs are linear, so they cant have the same rate across the entire wheel travel.

Further, lowering the car does benefit handling even if the springs aren't stiffer. Lowering the car reduces the amount of weight transfer during cornering which increases total grip. On the other hand, stiffer springs do no necessarily translate to an "increase" in handling. As a general rule, a softer suspension improves grip while a stiffer suspension improves response. The fine art of suspension tuning resides in achieving the perfect balance.

[henrylee]

Similar yes, identical no.

[FaRKle!]

Originally Posted by CanAutM3

I had also read the same, but I don't believe ir is true. The MP-HAS have a progressive spring rates on the front spring whereas the Comp pack springs are linear, so they cant have the same rate across the entire wheel travel.

I wonder how many of the MP-HAS spring's coils are in bind at static ride height. I've seen companies (like Bilstein) use progressive springs, however all of the low-rate coils were bound already at static height. They're using the low-rate coils to keep pre-load during droop, performing the same function as a helper spring in a dual-spring configuration. It's possible then that since the MP-HAS spring has to be able to allow a lower ride height, that the final rate could be similar to ZCP rates, and reasonable since they probably wouldn't change the rate drastically while keeping the damping the same.

[allinon72]

Originally Posted by FaRKle!

I wonder how many of the MP-HAS spring's coils are in bind at static ride height. I've seen companies (like Bilstein) use progressive springs, however all of the low-rate coils were bound already at static height. They're using the low-rate coils to keep pre-load during droop, performing the same function as a helper spring in a dual-spring configuration. It's possible then that since the MP-HAS spring has to be able to allow a lower ride height, that the final rate could be similar to ZCP rates, and reasonable since they probably wouldn't change the rate drastically while keeping the damping the same.

Here's what mine looks like (not sure why the pic is upside down)

[matty088]

Originally Posted by allinon72

Multi-page thread with testimonials disagrees with your assessment.

allinon72

I didn’t share an assessment. I said i read that the spring rates between the mp has and the ZCP are nearly identical. If you have facts that disagree then by all means share them.

With that said, i saw tons of people say mp has improved the firmness of their civic.