[Littierally]

Originally Posted by clutchdj

Lol. IMO 550h&r springs cant really keep the m5 (my base m5 back in ‘19) together on a road course. The rear end gets greasy due to lack of dampening especially when braking (@Pocono).

I’m sure it’ll run faster in a circle with proper coilovers but they need to be good b/c the car has so much power. OTOH, 550’s provide the best look out of all of the spring kits.

Dampening is handled by the strut not the spring.

The H&R ‘550i has a progressive spring rate that matches the stock M5 comp/CS spring rate in a shorter package.

Literally the only effect of install is that the car is lower, thus lowering the center of gravity, and theoretically improving aerodynamics and body roll.

[clutchdj]

Originally Posted by Littierally

Dampening is handled by the strut not the spring.

The H&R ‘550i has a progressive spring rate that matches the stock M5 comp/CS spring rate in a shorter package.

Literally the only effect of install is that the car is lower, thus lowering the center of gravity, and theoretically improving aerodynamics and body roll.

In a nutshell, springs and dampers are a marriage between bound and rebound. Lowering the CG is key but only part of the equation. The spring is what pushes the tires to ground. in other words on cheater tires, the car runs on bump stops due to the lack of sufficient rebound on a road course with the 550’s. Just my personal observations.

[shawnhayes]

Originally Posted by clutchdj

cuz the fvking car is incredible. Needs nothing. Maybe just a square setup 😁

Not at all fella,
BMW have spent countless hours, and $ honing the CS to achieve what it does, and i might add, it does it superbly. I just wouldnt mess with it at all in the chassis department. Ive driven the CS quite a bit, and its head and tails better than the Comp, in how it feels on the road. Each to their own, but i wouldnt touch it, as then, it isnt CS spec anymore, and could be argued, that its not worth as much ?. Im not bothered about what Harris does or doesnt do with his cars, just pointing out, that he hasnt touched his, and hes saying its the best M ever, in the spec its in ?.

Having driven the CS in stock, and square setup, and in comparison to a 2018 pre LCI on track, and around town...

The CS is pretty much perfect suspension setup for a heavy four door sedan on track. A square setup makes a little bit of oversteer possible.

But otherwise, unless you're just into looks, don't mess with it. It's as close to as good as it gets for this weight/power class.

Shawn

[aj_g80]

Originally Posted by shawnhayes

Having driven the CS in stock, and square setup, and in comparison to a 2018 pre LCI on track, and around town...

The CS is pretty much perfect suspension setup for a heavy four door sedan on track. A square setup makes a little bit of oversteer possible.

But otherwise, unless you're just into looks, don't mess with it. It's as close to as good as it gets for this weight/power class.

Shawn

Pretty much. CS will never see the track, did suspension for looks. And it looks MUCH better with the drop.

[Littierally]

Originally Posted by aj_g80

Pretty much. CS will never see the track, did suspension for looks. And it looks MUCH better with the drop.

Same. This conversation will always be full of opinions and no data, but either way, it’s only relevant for those who actually track their car. My CS will not be tracked. That’s what the GTR is for.

BMW’s goal was not to build a purpose-built track car with the CS, idk why everyone thinks it is. They allowed some features to slant away from comfort and toward performance - but not the suspension. Struts and springs are unchanged from the LCI M5C and M8C - with a happy balance of performance and comfort. If performance is all you’re worried about, the suspension could be improved at the sacrifice of comfort.

[shawnhayes]

Originally Posted by Littierally

Same. This conversation will always be full of opinions and no data, but either way, it’s only relevant for those who actually track their car. My CS will not be tracked. That’s what the GTR is for.

BMW’s goal was not to build a purpose-built track car with the CS, idk why everyone thinks it is. They allowed some features to slant away from comfort and toward performance - but not the suspension. Struts and springs are unchanged from the LCI M5C and M8C - with a happy balance of performance and comfort. If performance is all you’re worried about, the suspension could be improved at the sacrifice of comfort.

$16,000 brakes, $4,000 carbon seats, $8,000 suspension (that people think they can improve on). And you're NOT going to track that? That's like marrying a supermodel and not sleeping with her because "she's made for looks".

But to each his own. The car is absolutely KILLER on track, and embarrasses many dedicated track cars, and most lower priced Porsches. But hey, if THIS is your game, why not?



Shawn

[Littierally]

Don’t care so much about what other people do with their cars buddy. You’re just going to make yourself mad.

[shawnhayes]

Originally Posted by Littierally

Don’t care so much about what other people do with their cars buddy. You’re just going to make yourself mad.

Different strokes for different folks. I don't really care, but use the above as a good example. That will RUIN that cars ride. But SOME people think it looks good. Not for me...

But to say that BMW gave "some" nods to performance with that many changes (it got rid of the front camera and the center console, for goodness sakes) and not know that's a barn burner to make good stats is just denying how much work they did to remove a fair amount of weight.

We're all different, and that's fine. But to poo poo the idea that this a a track capable car and looks are more important is also kind of silly.

Shawn

[aj_g80]

I can never imagine tracking something as big as an m5. Lol.

[shawnhayes]

Originally Posted by aj_g80

I can never imagine tracking something as big as an m5. Lol.

Length, height, width, or weight?

Porsche 911 Turbo S

Wheelbase : 96.46 inches / 245.0 cm
Length : 177.44 inches / 450.7 cm
Width : 74.02 inches / 188.0 cm
Height : 51.06 inches / 129.7 cm
Front Axle : 60.67 inches / 154.1 cm
Rear Axle : 62.6 inches / 159.0 cm
Num. of Seats : 4
Aerodynamic drag coefficient - Cx : -
Front Brakes - Disc dimensions : -
(16.14 inches / 410 mm)
Rear Brakes - Dics dimensions : -
(15.35 inches / 390 mm)
Front Tyres - Rims dimensions : 245/35 R20
Rear Tyres - Rims dimensions : 305/30 R20
Front Wheels Width : 9,0"
Rear Wheels Width : 11,5"
Curb Weight : 3693 lbs / 1675 Kg

BMW M5 CS
Wheelbase : 117.4 inches / 298.2 cm
Length : 196.89 inches / 500.1 cm
Width : 74.92 inches / 190.3 cm
Height : 57.8 inches / 146.8 cm
Front Axle : 63.98 inches / 162.5 cm
Rear Axle : 62.76 inches / 159.4 cm
Ground clearance : 4.69 inches / 11.9 cm
Num. of Seats : 4
Aerodynamic drag coefficient - Cx : -
Front Brakes - Disc dimensions : Vented Discs
(- inches / - mm)
Rear Brakes - Dics dimensions : Vented Discs
(- inches / - mm)
Front Tyres - Rims dimensions : 275/35 R20
Rear Tyres - Rims dimensions : 285/35 R20
Turning radius : 41.3 feet / 12.6 m
Curb Weight : 3968 lbs / 1800 Kg

Source:ultimatespecs.com

It's a whole different world. Hard to say if the "sportscars" have gotten fat, or the "family cars" have stayed static while everything else has gotten fat.

Shawn

[Simon H]

Originally Posted by Littierally

Same. This conversation will always be full of opinions and no data, but either way, it’s only relevant for those who actually track their car. My CS will not be tracked. That’s what the GTR is for.

BMW’s goal was not to build a purpose-built track car with the CS, idk why everyone thinks it is. They allowed some features to slant away from comfort and toward performance - but not the suspension. Struts and springs are unchanged from the LCI M5C and M8C - with a happy balance of performance and comfort. If performance is all you’re worried about, the suspension could be improved at the sacrifice of comfort.

What do you think BMW have changed in the suspension, and chassis then ?, as its so much better handling, and riding than the LCI Competition ?. Feels like a different car to me, and thats after jumping from a Competition, to a CS straight away.

[AHall]

Originally Posted by shawnhayes

Length, height, width, or weight?

Porsche 911 Turbo S

Wheelbase : 96.46 inches / 245.0 cm
Length : 177.44 inches / 450.7 cm
Width : 74.02 inches / 188.0 cm
Height : 51.06 inches / 129.7 cm
Front Axle : 60.67 inches / 154.1 cm
Rear Axle : 62.6 inches / 159.0 cm
Num. of Seats : 4
Aerodynamic drag coefficient - Cx : -
Front Brakes - Disc dimensions : -
(16.14 inches / 410 mm)
Rear Brakes - Dics dimensions : -
(15.35 inches / 390 mm)
Front Tyres - Rims dimensions : 245/35 R20
Rear Tyres - Rims dimensions : 305/30 R20
Front Wheels Width : 9,0"
Rear Wheels Width : 11,5"
Curb Weight : 3693 lbs / 1675 Kg

BMW M5 CS
Wheelbase : 117.4 inches / 298.2 cm
Length : 196.89 inches / 500.1 cm
Width : 74.92 inches / 190.3 cm
Height : 57.8 inches / 146.8 cm
Front Axle : 63.98 inches / 162.5 cm
Rear Axle : 62.76 inches / 159.4 cm
Ground clearance : 4.69 inches / 11.9 cm
Num. of Seats : 4
Aerodynamic drag coefficient - Cx : -
Front Brakes - Disc dimensions : Vented Discs
(- inches / - mm)
Rear Brakes - Dics dimensions : Vented Discs
(- inches / - mm)
Front Tyres - Rims dimensions : 275/35 R20
Rear Tyres - Rims dimensions : 285/35 R20
Turning radius : 41.3 feet / 12.6 m
Curb Weight : 3968 lbs / 1800 Kg

Source:ultimatespecs.com

It's a whole different world. Hard to say if the "sportscars" have gotten fat, or the "family cars" have stayed static while everything else has gotten fat.

Shawn

I am surprised the weight difference is less than 300 lbs. I thought Porches were lighter than a feather.

[windtendo]

Originally Posted by Simon H

What do you think BMW have changed in the suspension, and chassis then ?, as its so much better handling, and riding than the LCI Competition ?. Feels like a different car to me, and thats after jumping from a Competition, to a CS straight away.

The CS badge on the back says so. The badge gives it the handling.

[BMA89]

Thought I would share some pics of my car from last weekends BMW car show in Boston!

[shawnhayes]

Originally Posted by Simon H

What do you think BMW have changed in the suspension, and chassis then ?, as its so much better handling, and riding than the LCI Competition ?. Feels like a different car to me, and thats after jumping from a Competition, to a CS straight away.

It is. I'm not sure I buy the "it's the same as the LCI Competition". Everybody who drives it says its different. BMW says its the M8 suspension. I can't say I've driven an LCI Competition and a CS back to back, but the CS is WORLDS different than the base 2018 I had. WORLDS.

Shawn

[shawnhayes]

Originally Posted by AHall

I am surprised the weight difference is less than 300 lbs. I thought Porches were lighter than a feather.

They're not. It's the reason when the Porsche owners get pissed when I pass them at the track I can make them feel better about themselves. I remind them that I'm not that much heavier than they are.

Shawn

[shawnhayes]

Originally Posted by windtendo

The CS badge on the back says so. The badge gives it the handling.

You got any data to show that the suspensions on the Competition and the M5 CS are the same? BMW says it's from the M8, which is better.

Shawn

[windtendo]

Originally Posted by shawnhayes

You got any data to show that the suspensions on the Competition and the M5 CS are the same? BMW says it's from the M8, which is better.

Shawn

As a matter of fact I do.

"Chief among which is the addition of a brand-new set of dampers; BMW says the new M5 Comp “benefits from experience gained in the development of the new BMW M8 Competition Gran Coupe”."

https://www.topgear.com/car-news/fir...cy-new-dampers

The M5 LCI and M8 share the same suspension.

[ResIpsaLoquitur]

Originally Posted by BMA89

Thought I would share some pics of my car from last weekends BMW car show in Boston!

Larz Anderson again! Love it!

P.S. license plate is awesome! 👊

[shawnhayes]

Originally Posted by windtendo

As a matter of fact I do.

"Chief among which is the addition of a brand-new set of dampers; BMW says the new M5 Comp “benefits from experience gained in the development of the new BMW M8 Competition Gran Coupe”."

https://www.topgear.com/car-news/fir...cy-new-dampers

The M5 LCI and M8 share the same suspension.

I still know they're different. May be the same damper, but the spring is different.

"This chassis was adopted to reduce the ride height by around 7 mm. The new Chassis is designed to work with track tires. The suspension system has shock absorbers originally designed for the BMW M8 Gran Coupe. These shocks not only pave the way for a comfortable ride but also reduce tire pressure to improve handling, no matter where you drive. To account for the vehicle’s lower weight and increased tire performance, the front and rear axle bearing springs of the BMW M5 CS have been recalibrated and the damper control has also been revised accordingly."

https://www.hotcars.com/bmw-m5-cs-pe...g-enthusiasts/

Everybody who drives a competition and CS back to back say they're different. I haven't done so, but I knew with that much weight, the springs for the Grand Coupe are WAYY wrong for the CS.

Shawn

[aj_g80]

Originally Posted by shawnhayes

Length, height, width, or weight?

Porsche 911 Turbo S

Wheelbase : 96.46 inches / 245.0 cm
Length : 177.44 inches / 450.7 cm
Width : 74.02 inches / 188.0 cm
Height : 51.06 inches / 129.7 cm
Front Axle : 60.67 inches / 154.1 cm
Rear Axle : 62.6 inches / 159.0 cm
Num. of Seats : 4
Aerodynamic drag coefficient - Cx : -
Front Brakes - Disc dimensions : -
(16.14 inches / 410 mm)
Rear Brakes - Dics dimensions : -
(15.35 inches / 390 mm)
Front Tyres - Rims dimensions : 245/35 R20
Rear Tyres - Rims dimensions : 305/30 R20
Front Wheels Width : 9,0"
Rear Wheels Width : 11,5"
Curb Weight : 3693 lbs / 1675 Kg

BMW M5 CS
Wheelbase : 117.4 inches / 298.2 cm
Length : 196.89 inches / 500.1 cm
Width : 74.92 inches / 190.3 cm
Height : 57.8 inches / 146.8 cm
Front Axle : 63.98 inches / 162.5 cm
Rear Axle : 62.76 inches / 159.4 cm
Ground clearance : 4.69 inches / 11.9 cm
Num. of Seats : 4
Aerodynamic drag coefficient - Cx : -
Front Brakes - Disc dimensions : Vented Discs
(- inches / - mm)
Rear Brakes - Dics dimensions : Vented Discs
(- inches / - mm)
Front Tyres - Rims dimensions : 275/35 R20
Rear Tyres - Rims dimensions : 285/35 R20
Turning radius : 41.3 feet / 12.6 m
Curb Weight : 3968 lbs / 1800 Kg

Source:ultimatespecs.com

It's a whole different world. Hard to say if the "sportscars" have gotten fat, or the "family cars" have stayed static while everything else has gotten fat.

Shawn

I think we can all agree cars are heavier, and still doing some very impressive things. The m5 in stock (non cs form) is a great example of that.


You are reading too much into me and a few others adding springs to the CS, no matter what you say. We already stated the cars wont be tracked, and yet you still keep badgering "why not" basically.

Fortunate enough to have owned a real track car like the 600LT (which is not up for debate) i see 0 reason to track an M5. I'm not saying the CS can't be tracked, it's your car, do as you please. But to say its "made for track use" is a stretch. There are better options out there, if you can afford it. Period.


Let's get this thread back on topic, and not about who lowered their CS..

[shawnhayes]

Originally Posted by aj_g80

I think we can all agree cars are heavier, and still doing some very impressive things. The m5 in stock (non cs form) is a great example of that.


You are reading too much into me and a few others adding springs to the CS, no matter what you say. We already stated the cars wont be tracked, and yet you still keep badgering "why not" basically.

Fortunate enough to have owned a real track car like the 600LT (which is not up for debate) i see 0 reason to track an M5. I'm not saying the CS can't be tracked, it's your car, do as you please. But to say its "made for track use" is a stretch. There are better options out there, if you can afford it. Period.


Let's get this thread back on topic, and not about who lowered their CS..

Ahem, don't really care if you slam the car. But I do encourage people who haven't been to an HPDE to go. Or at least to the M Performance school, or just something other than polishing the intake and exhaust tips.

And this IS about the CS. No, I don't care who lowered the CS. Doesn't matter. But, awesome car. I enjoy mine. I even enjoy the pics of the lowered ones (well, not slammed, ruins the look, and the ride as well, but lowered and slammed are different).

Shawn