[Tag]

Originally Posted by 86zccrx

Even though they admittedly don't look as good as a fixed caliper, I don't think anybody has complained about the rear braking performance of these cars despite their weight.

Maybe they haven't complained about performance but guess you missed all the posts on the G80 forum of people complaining that you cannot easily change out the pads for track use like you could on the F8x, you need to remove the rear caliper. You also need to retract the electric parking brake motor. Total PIA.

[86zccrx]

Originally Posted by Tag

Maybe they haven't complained about performance but guess you missed all the posts on the G80 forum of people complaining that you cannot easily change out the pads for track use like you could on the F8x, you need to remove the rear caliper. You also need to retract the electric parking brake motor. Total PIA.

I didn't remember reading about that, but it makes sense. Thanks for the information.

[M Division]

Originally Posted by 86zccrx

Here are the next 2 pages of the technical reference guide which is available on the M3 forum and a good read as I would assume a lot carries over to the M2. The first image index numbers are referencing the front end image posted earlier in the thread.

I stuck my head and phone light as far under the G87 as I could (not very far) but from what I could make out - the chassis, reinforcements and suspension arms all looked very much identical to the G82. For example the control arms where aluminium like the Ms and not steel like the G42. The back box on the exhaust looked identical, hubs, brakes, calipers, etc, etc. Even the skid plate and bracing under the S58 looked same same.

Admittedly I was laying on the floor of a dealership with a phone light so I'm sure there's plenty of nuances I missed but any fears I had that the M2 featured G42 components instead of G80/82 (when I discovered the G87 uses cast wheels, for example I was a little worried) - were alleviated.

[Tag]

Originally Posted by M Division

I stuck my head and phone light as far under the G87 as I could (not very far) but from what I could make out - the chassis, reinforcements and suspension arms all looked very much identical to the G82. For example the control arms where aluminium like the Ms and not steel like the G42. The back box on the exhaust looked identical, hubs, brakes, calipers, etc, etc. Even the skid plate and bracing under the S58 looked same same.

Admittedly I was laying on the floor of a dealership with a phone light so I'm sure there's plenty of nuances I missed but any fears I had that the M2 featured G42 components instead of G80/82 (when I discovered the G87 uses forged wheels, for example I was a little worried) - were alleviated.

Yes, I thought the additional bracing was specific to the G87 but as you say it's basically a copy paste of the M3/4.

Not sure if this is a typo but the G87 uses cast wheels.
"(when I discovered the G87 uses forged wheels, for example I was a little worried)"

[donm527]

An M4-Lite with shorter wheelbase for a little more "fun" driving characteristic and 6-speed manual.

Originally Posted by Tag

Yes, I thought the additional bracing was specific to the G87 but as you say it's basically a copy paste of the M3/4.

Not sure if this is a typo but the G87 uses cast wheels.
"(when I discovered the G87 uses forged wheels, for example I was a little worried)"

[M Division]

Originally Posted by Tag

Yes, I thought the additional bracing was specific to the G87 but as you say it's basically a copy paste of the M3/4.

Not sure if this is a typo but the G87 uses cast wheels.
"(when I discovered the G87 uses forged wheels, for example I was a little worried)"

Ah yes typo, I meant cast.. I was worried there might of been other cost cutting around control arms or something, which would explain the weight but happily, no, everything I could see is pure M quality parts under the car. It looks like a super serious bit of kit.

Ive already bought a set of forged wheels for my G87. Now I just need the car!

[M Division]

On the topic of bracing, I'm trying to decide I bother fitting the CSL Strut brace on the G87 or leave it as is. Ive heard so many mixed reviews, everything from it isntantly improves front end feel to it's completely unoticable to it adds too much torsional rigidity and compromised the ride (the latter seems highly unlikely). I can only assume on track it would be noticed, average street driving not so much.

[Tag]

Originally Posted by M Division

On the topic of bracing, I'm trying to decide I bother fitting the CSL Strut brace on the G87 or leave it as is. Ive heard so many mixed reviews, everything from it isntantly improves front end feel to it's completely unoticable to it adds too much torsional rigidity and compromised the ride (the latter seems highly unlikely). I can only assume on track it would be noticed, average street driving not so much.

A stiffer chassis rides and handles better because it makes the suspension work more. The downside of that is a stiffer chassis better be robust or you’ll get damage from metal fatigue which is why BMW adds all the additional bracing. I agree, you probably wouldn’t notice the CSL brace on the street but would on track where you can really push the car. BMW wouldn’t give the CSL a bigger brace if it didn’t do anything.

[M Division]

Originally Posted by Tag

A stiffer chassis rides and handles better because it makes the suspension work more. The downside of that is a stiffer chassis better be robust or you’ll get damage from metal fatigue which is why BMW adds all the additional bracing. I agree, you probably wouldn’t notice the CSL brace on the street but would on track where you can really push the car. BMW wouldn’t give the CSL a bigger brace if it didn’t do anything.

I wonder if anyone has weighed the CSL brace vs stock. Can't be much in it either way.

[zero21]

Originally Posted by M Division

I wonder if anyone has weighed the CSL brace vs stock. Can't be much in it either way.

It's advertised as 3.3lbs lighter than stock. But, crucially it adds another attachment point spreading force across more of the front k member.

[Tag]

Have to admit, it looks awesome. I wouldn't be able to justify the cost though.

[M Division]

Originally Posted by Tag

Have to admit, it looks awesome. I wouldn't be able to justify the cost though.

It is a nice but if engine bay jewlery. Up there with the F chassis carbon strut.

[T_U_D]

Man, do I remember the arguments owners had back in the day when the E39 M5 was new. Dinan strut brace vs no strut brace. Those that purchased it swore up and down that it made a difference and those that refused to purchase it always stipulated that it did not make a damn bit of difference given the vehicle’s torsional rigidity. “Engine Compartment Jewelry.”

[sl0m0]

Originally Posted by Tag

Have to admit, it looks awesome. I wouldn't be able to justify the cost though.

One of these powder coated would be nice.

[M Division]

Originally Posted by Tag

Have to admit, it looks awesome. I wouldn't be able to justify the cost though.

Quite the visual upgrade

[M Division]

I'm not sure if the CSL brace will directly fit the G87 because the outside most strut nuts are covered by the plastic shroud.. is the shroud covering attachments to additional stiffening plates? I assume you might need to at least have to trim the plastic to fit over the CSL brace.

Either way it would be a shame to cover up part of that brace

Ive zoomed in on the suspect areas (albeit opposite sides of the engine bay - drive and pass side are identical)

[M Division]

Originally Posted by Ghostrider.1127

Braking will make the wheels dirty....

It's also bad for fuel economy and thus the environment. Greta says "how dare you" to braking.

[bluebro]

Noticed on the G87 the rubber seal is in front of the EDC plug but on G82 the rubber seal goes behind the EDC plug

[Bee Pee]

Originally Posted by bluebro

Noticed on the G87 the rubber seal is in front of the EDC plug but on G82 the rubber seal goes behind the EDC plug

Some dremel work on g87 plastics likely for csl brace retrofit on new m2 😉

[DFW_M]

Originally Posted by M Division

Quite the visual upgrade

Because that is the view I see every day...

[TallGibbs]

Originally Posted by BimmerFix

Is that what it’s called, Im sorry my car mechanic lingo isn’t the best. The front V shaped struts . I’ll try to attach an image bear with me

Fyi the car incorporates alot more steel than aluminum . If you take a look at the technical diagrams you can see for yourself. Most the suspension of an M car is not aluminum , contrary to what most people believe.

I haven't read through all the threads yet, but is this excerpt of the technical manual available specifically for the G87? I loved reading through the S58 engine technical manual that showed all sorts of technical schematics and would very much enjoy seeing this chasis/suspension technical document in entirety as well.

[GregW / Oregon]

Originally Posted by bluebro

Noticed on the G87 the rubber seal is in front of the EDC plug but on G82 the rubber seal goes behind the EDC plug

I wonder if the G82 plastic seal piece would fit the G87? A lot in common between these cars.