H&R M550i Sport Springs on the M5 F90

r33_RGSport · 02-28-2019, 09:13 AM

Different suspension geometry and shock length is the main key here.

soooma · 02-28-2019, 09:22 AM

Quote:

Originally Posted by r33_RGSport

Different suspension geometry and shock length is the main key here.

There you go!
That's wha tI am talking about Abd did suspect that M550i will not have the same drop cosmetically like the M5,

Another question r33_RGSport Ben, how come it's for M550i and feel that noticeably stiffer? I feel I just jumped into an M5C which I have heard about but never tasted the forbidden fruit

soooma · 02-28-2019, 09:26 AM

Quote:

Originally Posted by Vic55

Quote:

Originally Posted by soooma

So we surmise that I sometimes actually listen to you guys

Dropping the mic again

I would not say you listen but in this case you only posted maybe 22 times about lowering. So Id say you were beaten into submission here and finally gave in hahahahahahhaha. Soooma Posting Double Secret Probation Officer Police.

You will be picking up that proverbial mic yet again once you change your Dinan LOL.

Did you align the car after the drop? How many miles since the process? I have no doubts on the form, the question I have is the functionality piece. Is it more bouncy or less? How is the ride over deeper undulations and uneven pavement. Can you drive it in Sport Plus still or do you ever?

I never drive in sports plus before

It's certainly less bouncy, it's firmer stiffer and reminds me of the R8 V10 rose a year ago! Was that flat on cornering which I appreciate a lot, honestly did it for looks but got some handling improvement thrown in too, didn't expect that from mundane M550Xi springs!

With that said, as far as undulations are concerned it's slightly but noticeably for sure less comfy but not in an annoying way, call it a nice trade off? And for someone who has been having M5C envy as of late reading some reviews! I'll take it if it's jarring, but it's not! Had my old my in the car last night and no complaints!

I did get it aligned and shop charged me 150$ just for that besides the agreed upon 500$, not sure how fair that is because it was never brought up before we have agreed on 500$

, I'm thinking it should have been built in the 500$?

I shouldn't bit**? Right?

I drove it more than 100 miles and I like it more 80% for the looks and 20% because of the other gains thrown in as a bonus in my mind!

Ever34 · 02-28-2019, 10:02 AM

In terms of performance would these springs have any negative impact on the overall feel of the car. I'm asking because one (me) would assume that springs for a 550 would be " softer " than those for a performance car like the M5. Any input would be appreciated. I want to lower mine before my new wheels come in.

soooma · 02-28-2019, 10:12 AM

Quote:

Originally Posted by Ever34

In terms of performance would these springs have any negative impact on the overall feel of the car. I'm asking because one (me) would assume that springs for a 550 would be " softer " than those for a performance car like the M5. Any input would be appreciated. I want to lower mine before my new wheels come in.

I may need more time, and I was warned by shop not to expect improvement in the TRACKING department which I don't care about, but if to my total surprise car just handles better and flatter on cornering and up above all less bouncy!

Anybody wakes who can chime in? Because I don't want my mind to be playing tricks on me and my wishful thinking gets the best of me

soooma · 02-28-2019, 10:31 AM

Quote:

Originally Posted by EDDYFIG

Car looks great ! I'm so happy I was able to help you make the decision and most of all keep you away from F90 H&R springs !!!!

Hey as you see we got a few of questions about handling, cornering, bounciest and stiffness and since I am sure you had a lot more behind the steering time than my self with this set up, we would love to hear your thoughts?

r33_RGSport · 02-28-2019, 12:40 PM

Quote:

Originally Posted by soooma

There you go!
That's wha tI am talking about Abd did suspect that M550i will not have the same drop cosmetically like the M5,

Another question r33_RGSport Ben, how come it's for M550i and feel that noticeably stiffer? I feel I just jumped into an M5C which I have heard about but never tasted the forbidden fruit

In general, there are 2 ways in making lowering spring.
1. H&R generally uses style where it have lower spring rate on the top few coils and high spring rate on the rest.
2. Eibach generally uses style where it have more gradual spring rate from lower to higher from top to the bottom.

With H&R style, you'll gain more drop with a compromise of stiffer ride most of the time. If your shock valving is not up to par or close to it, you will feel bounciness.
With Eibach style, you'll gain less drop but ride will be similar or close to stock.

Maybe Miko M will have better answer since he is in the spring manufacturing business.

soooma · 02-28-2019, 12:42 PM

Quote:

Originally Posted by r33_RGSport

Quote:

Originally Posted by soooma

There you go!
That's wha tI am talking about Abd did suspect that M550i will not have the same drop cosmetically like the M5,

Another question r33_RGSport Ben, how come it's for M550i and feel that noticeably stiffer? I feel I just jumped into an M5C which I have heard about but never tasted the forbidden fruit

In general, there are 2 ways in making lowering spring.
1. H&R generally uses style where it have lower spring rate on the top few coils and high spring rate on the rest.
2. Eibach generally uses style where it have more gradual spring rate from lower to higher from top to the bottom.

With H&R style, you'll gain more drop with a compromise of stiffer ride most of the time. If your shock valving is not up to par or close to it, you will feel bounciness.
With Eibach style, you'll gain less drop but ride will be similar or close to stock.

Maybe Miko M will have better answer since he is in the spring manufacturing business.

Either too technical or English being my second language is the issue? LOL
Wanna give it another go in English!

r33_RGSport · 02-28-2019, 12:52 PM

Quote:

Originally Posted by soooma

Either too technical or English being my second language is the issue? LOL
Wanna give it another go in English!

Uh, Miko M English also a second language.
Same as mine, lol.

Maybe Vic55 can translate it. ::throwing the mic to Vic::

Vic55 · 02-28-2019, 01:07 PM

Quote:

Originally Posted by r33_RGSport

Uh, Miko M English also a second language.
Same as mine, lol.

Maybe Vic55 can translate it. ::throwing the mic to Vic::

vic catches mic and sets it on fire

Burn Soooma burn

soooma · 02-28-2019, 01:57 PM

Quote:

Originally Posted by Vic55

Quote:

Originally Posted by r33_RGSport

Uh, Miko M English also a second language.
Same as mine, lol.

Maybe Vic55 can translate it. ::throwing the mic to Vic::

vic catches mic and sets it on fire

Burn Soooma burn

soooma picks up the Mic thrown at him by Vic,
You wish

LOL

pjdizzle94 · 02-28-2019, 02:14 PM

M550i springs are definitely solid. I loved mine!

Ever34 · 02-28-2019, 02:29 PM

Quote:

Originally Posted by pjdizzle94

M550i springs are definitely solid. I loved mine!

So you did not feel like they were a compromise at all?

Miko M · 02-28-2019, 04:39 PM

Quote:

Originally Posted by r33_RGSport

Quote:

Originally Posted by soooma

There you go!
That's wha tI am talking about Abd did suspect that M550i will not have the same drop cosmetically like the M5,

Another question r33_RGSport Ben, how come it's for M550i and feel that noticeably stiffer? I feel I just jumped into an M5C which I have heard about but never tasted the forbidden fruit

In general, there are 2 ways in making lowering spring.
1. H&R generally uses style where it have lower spring rate on the top few coils and high spring rate on the rest.
2. Eibach generally uses style where it have more gradual spring rate from lower to higher from top to the bottom.

With H&R style, you'll gain more drop with a compromise of stiffer ride most of the time. If your shock valving is not up to par or close to it, you will feel bounciness.
With Eibach style, you'll gain less drop but ride will be similar or close to stock.

Maybe Miko M will have better answer since he is in the spring manufacturing business.

I really didn't feel much of a difference from stock to H&R Springs
I wanted to check the spring rate on both but never got to it

What RG is referring to is, multiple rate Springs( progressive rate ) vs single rate ( liner rate )
You can usually see on variable pitch and also inner diameter ( like tapered Springs )
It gets very tricky when you change the rate and, at what hight you are changing it.
Another thing when you shorten up the spring the Load is changing at preloaded hight off the car, there is a way compensating for that by changing the end coils or even the wire diameter.
I have a software that i can change the hight of a Spring but maintain the same rate of stock Springs, usually that requires changes to wire diameter or variable pitch.
Hope this didn't confuse anyone. Lol

soooma · 02-28-2019, 04:46 PM

Quote:

Originally Posted by Miko M

Quote:

Originally Posted by r33_RGSport

Quote:

Originally Posted by soooma

There you go!
That's wha tI am talking about Abd did suspect that M550i will not have the same drop cosmetically like the M5,

Another question r33_RGSport Ben, how come it's for M550i and feel that noticeably stiffer? I feel I just jumped into an M5C which I have heard about but never tasted the forbidden fruit

In general, there are 2 ways in making lowering spring.
1. H&R generally uses style where it have lower spring rate on the top few coils and high spring rate on the rest.
2. Eibach generally uses style where it have more gradual spring rate from lower to higher from top to the bottom.

With H&R style, you'll gain more drop with a compromise of stiffer ride most of the time. If your shock valving is not up to par or close to it, you will feel bounciness.
With Eibach style, you'll gain less drop but ride will be similar or close to stock.

Maybe Miko M will have better answer since he is in the spring manufacturing business.

I really didn't feel much of a difference from stock to H&R Springs
I wanted to check the spring rate on both but never got to it

What RG is referring to is, multiple rate Springs( progressive rate ) vs single rate ( liner rate )
You can usually see on variable pitch and also inner diameter ( like tapered Springs )
It gets very tricky when you change the rate and, at what hight you are changing it.
Another thing when you shorten up the spring the Load is changing at preloaded hight off the car, there is a way compensating for that by changing the end coils or even the wire diameter.
I have a software that i can change the hight of a Spring but maintain the same rate of stock Springs, usually that requires changes to wire diameter or variable pitch.
Hope this didn't confuse anyone. Lol

Miko Miko Miko
You the king man!
Wanna elaborate on handling? Stiffness? Cornering? Insulation and your overarching impression!

Thx

Miko M · 02-28-2019, 04:46 PM

Here is example of a multi Rate spring I made
It has veritable pitch and reduced end coils

soooma · 02-28-2019, 04:48 PM

Quote:

Originally Posted by Miko M

Here is example of a multi Rate spring I made
It has veritable pitch and reduced end coils

Too scientific for my boorish layman's term LOL
Thanks
Have more to add?

Miko M · 02-28-2019, 05:15 PM

Quote:

Originally Posted by soooma

Quote:

Originally Posted by Miko M

Quote:

Originally Posted by r33_RGSport

Quote:

Originally Posted by soooma

There you go!
That's wha tI am talking about Abd did suspect that M550i will not have the same drop cosmetically like the M5,

Another question r33_RGSport Ben, how come it's for M550i and feel that noticeably stiffer? I feel I just jumped into an M5C which I have heard about but never tasted the forbidden fruit

In general, there are 2 ways in making lowering spring.
1. H&R generally uses style where it have lower spring rate on the top few coils and high spring rate on the rest.
2. Eibach generally uses style where it have more gradual spring rate from lower to higher from top to the bottom.

With H&R style, you'll gain more drop with a compromise of stiffer ride most of the time. If your shock valving is not up to par or close to it, you will feel bounciness.
With Eibach style, you'll gain less drop but ride will be similar or close to stock.

Maybe Miko M will have better answer since he is in the spring manufacturing business.

I really didn't feel much of a difference from stock to H&R Springs
I wanted to check the spring rate on both but never got to it

What RG is referring to is, multiple rate Springs( progressive rate ) vs single rate ( liner rate )
You can usually see on variable pitch and also inner diameter ( like tapered Springs )
It gets very tricky when you change the rate and, at what hight you are changing it.
Another thing when you shorten up the spring the Load is changing at preloaded hight off the car, there is a way compensating for that by changing the end coils or even the wire diameter.
I have a software that i can change the hight of a Spring but maintain the same rate of stock Springs, usually that requires changes to wire diameter or variable pitch.
Hope this didn't confuse anyone. Lol

Miko Miko Miko
You the king man!
Wanna elaborate on handling? Stiffness? Cornering? Insulation and your overarching impression!

Thx

Thanks brother!

The drop on mine car was 7/8" front and only 3/8 on the back.
Which means very little changes are actually being done ( specially on the back )
It's literally cheep way to duplicate the Spring just making the F.L. shorter
That's why cornering and compression is almost the same.
Now with M550 Springs could be different because the Springs are shorter and you could potentially bottom out and hit the stops.

Miko M · 02-28-2019, 05:18 PM

Quote:

Originally Posted by soooma

Quote:

Originally Posted by Miko M

Here is example of a multi Rate spring I made
It has veritable pitch and reduced end coils

Too scientific for my boorish layman's term LOL
Thanks
Have more to add?

On our cars the Springs have open end coils
I make them to at work but most Springs are actually made close end end ground so they sit square. See picture

soooma · 02-28-2019, 05:19 PM

Quote:

Originally Posted by Miko M

Quote:

Originally Posted by soooma

Quote:

Originally Posted by Miko M

Quote:

Originally Posted by r33_RGSport

Quote:

Originally Posted by soooma

There you go!
That's wha tI am talking about Abd did suspect that M550i will not have the same drop cosmetically like the M5,

Another question r33_RGSport Ben, how come it's for M550i and feel that noticeably stiffer? I feel I just jumped into an M5C which I have heard about but never tasted the forbidden fruit

In general, there are 2 ways in making lowering spring.
1. H&R generally uses style where it have lower spring rate on the top few coils and high spring rate on the rest.
2. Eibach generally uses style where it have more gradual spring rate from lower to higher from top to the bottom.

With H&R style, you'll gain more drop with a compromise of stiffer ride most of the time. If your shock valving is not up to par or close to it, you will feel bounciness.
With Eibach style, you'll gain less drop but ride will be similar or close to stock.

Maybe Miko M will have better answer since he is in the spring manufacturing business.

I really didn't feel much of a difference from stock to H&R Springs
I wanted to check the spring rate on both but never got to it

What RG is referring to is, multiple rate Springs( progressive rate ) vs single rate ( liner rate )
You can usually see on variable pitch and also inner diameter ( like tapered Springs )
It gets very tricky when you change the rate and, at what hight you are changing it.
Another thing when you shorten up the spring the Load is changing at preloaded hight off the car, there is a way compensating for that by changing the end coils or even the wire diameter.
I have a software that i can change the hight of a Spring but maintain the same rate of stock Springs, usually that requires changes to wire diameter or variable pitch.
Hope this didn't confuse anyone. Lol

Miko Miko Miko
You the king man!
Wanna elaborate on handling? Stiffness? Cornering? Insulation and your overarching impression!

Thx

Thanks brother!

The drop on mine car was 7/8" front and only 3/8 on the back.
Which means very little changes are actually being done ( specially on the back )
It's literally cheep way to duplicate the Spring just making the F.L. shorter
That's why cornering and compression is almost the same.
Now with M550 Springs could be different because the Springs are shorter and you could potentially bottom out and hit the stops.

Now you just stepped on sore toes

I think I tried to reproduce that taking a very deep slope at 60mph with 2 adults and 2 children and a semi full trunk, yet if it happened it was subtle and in the back only,

How bad is it to hit stoppers?

Miko M · 02-28-2019, 05:32 PM

Quote:

Originally Posted by soooma

Quote:

Originally Posted by Miko M

Quote:

Originally Posted by soooma

Quote:

Originally Posted by Miko M

Quote:

Originally Posted by r33_RGSport

Quote:

Originally Posted by soooma

There you go!
That's wha tI am talking about Abd did suspect that M550i will not have the same drop cosmetically like the M5,

Another question r33_RGSport Ben, how come it's for M550i and feel that noticeably stiffer? I feel I just jumped into an M5C which I have heard about but never tasted the forbidden fruit

In general, there are 2 ways in making lowering spring.
1. H&R generally uses style where it have lower spring rate on the top few coils and high spring rate on the rest.
2. Eibach generally uses style where it have more gradual spring rate from lower to higher from top to the bottom.

With H&R style, you'll gain more drop with a compromise of stiffer ride most of the time. If your shock valving is not up to par or close to it, you will feel bounciness.
With Eibach style, you'll gain less drop but ride will be similar or close to stock.

Maybe Miko M will have better answer since he is in the spring manufacturing business.

I really didn't feel much of a difference from stock to H&R Springs
I wanted to check the spring rate on both but never got to it

What RG is referring to is, multiple rate Springs( progressive rate ) vs single rate ( liner rate )
You can usually see on variable pitch and also inner diameter ( like tapered Springs )
It gets very tricky when you change the rate and, at what hight you are changing it.
Another thing when you shorten up the spring the Load is changing at preloaded hight off the car, there is a way compensating for that by changing the end coils or even the wire diameter.
I have a software that i can change the hight of a Spring but maintain the same rate of stock Springs, usually that requires changes to wire diameter or variable pitch.
Hope this didn't confuse anyone. Lol

Miko Miko Miko
You the king man!
Wanna elaborate on handling? Stiffness? Cornering? Insulation and your overarching impression!

Thx

Thanks brother!

The drop on mine car was 7/8" front and only 3/8 on the back.
Which means very little changes are actually being done ( specially on the back )
It's literally cheep way to duplicate the Spring just making the F.L. shorter
That's why cornering and compression is almost the same.
Now with M550 Springs could be different because the Springs are shorter and you could potentially bottom out and hit the stops.

Now you just stepped on sore toes

I think I tried to reproduce that taking a very deep slope at 60mph with 2 adults and 2 children and a semi full trunk, yet if it happened it was subtle and in the back only,

How bad is it to hit stoppers?

Lol
I haven't done it. But with shorter springs like the one from M550 chances are much higher, specially full loaded car

Ever34 · 02-28-2019, 05:41 PM

Quote:

Originally Posted by soooma

Quote:

Originally Posted by Miko M

Quote:

Originally Posted by soooma

Quote:

Originally Posted by Miko M

Quote:

Originally Posted by r33_RGSport

Quote:

Originally Posted by soooma

There you go!
That's wha tI am talking about Abd did suspect that M550i will not have the same drop cosmetically like the M5,

Another question r33_RGSport Ben, how come it's for M550i and feel that noticeably stiffer? I feel I just jumped into an M5C which I have heard about but never tasted the forbidden fruit

In general, there are 2 ways in making lowering spring.
1. H&R generally uses style where it have lower spring rate on the top few coils and high spring rate on the rest.
2. Eibach generally uses style where it have more gradual spring rate from lower to higher from top to the bottom.

With H&R style, you'll gain more drop with a compromise of stiffer ride most of the time. If your shock valving is not up to par or close to it, you will feel bounciness.
With Eibach style, you'll gain less drop but ride will be similar or close to stock.

Maybe Miko M will have better answer since he is in the spring manufacturing business.

I really didn't feel much of a difference from stock to H&R Springs
I wanted to check the spring rate on both but never got to it

What RG is referring to is, multiple rate Springs( progressive rate ) vs single rate ( liner rate )
You can usually see on variable pitch and also inner diameter ( like tapered Springs )
It gets very tricky when you change the rate and, at what hight you are changing it.
Another thing when you shorten up the spring the Load is changing at preloaded hight off the car, there is a way compensating for that by changing the end coils or even the wire diameter.
I have a software that i can change the hight of a Spring but maintain the same rate of stock Springs, usually that requires changes to wire diameter or variable pitch.
Hope this didn't confuse anyone. Lol

Miko Miko Miko
You the king man!
Wanna elaborate on handling? Stiffness? Cornering? Insulation and your overarching impression!

Thx

Thanks brother!

The drop on mine car was 7/8" front and only 3/8 on the back.
Which means very little changes are actually being done ( specially on the back )
It's literally cheep way to duplicate the Spring just making the F.L. shorter
That's why cornering and compression is almost the same.
Now with M550 Springs could be different because the Springs are shorter and you could potentially bottom out and hit the stops.

Now you just stepped on sore toes

I think I tried to reproduce that taking a very deep slope at 60mph with 2 adults and 2 children and a semi full trunk, yet if it happened it was subtle and in the back only,

How bad is it to hit stoppers?

This bad

))))))))

02-28-2019, 09:13 AM	#23
r33_RGSport General 12914 Rep 18,685 Posts Drives: G09 XM, G05 X5 40, 991.2 T Join Date: Oct 2009 Location: So. Cal iTrader: (6)	Different suspension geometry and shock length is the main key here. __________________ Email:sales@rgsport.com \| IG:RGSport_USA \| Web:RGSportShop.com PM for Everyday DEALS!! MSS • iSweep • RaceChip • Sterckenn • AutoTecknic • Akrapovic • Vossen Wheels • Eventuri Active Autowerke • KW • H&R • Ohlins • Remus • and more...
	Appreciate 1 soooma1376.50 Quote

02-28-2019, 10:02 AM	#26
Ever34 Lieutenant 325 Rep 519 Posts Drives: F90 M5 Join Date: Jun 2018 Location: Ottawa, Canada iTrader: (0)	In terms of performance would these springs have any negative impact on the overall feel of the car. I'm asking because one (me) would assume that springs for a 550 would be " softer " than those for a performance car like the M5. Any input would be appreciated. I want to lower mine before my new wheels come in.
	Appreciate 1 soooma1376.50 Quote

02-28-2019, 02:14 PM	#34
pjdizzle94 Brigadier General 843 Rep 3,146 Posts Drives: e92 m3 and others Join Date: Sep 2010 Location: Yorba Linda, CA iTrader: (10)	M550i springs are definitely solid. I loved mine! __________________ Bagged F90 M5 Gen 2 Raptor IG thatcarguypj
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02-28-2019, 04:46 PM	#38
Miko M ///M 6651 Rep 3,683 Posts Drives: 2020 M2C. 2020 X3M Join Date: May 2018 Location: Wisconsin iTrader: (0)	Here is example of a multi Rate spring I made It has veritable pitch and reduced end coils Attached Images __________________ Life is too short...enjoy your life ///M
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