BMW M5 Forum and M6 Forums banner

41 - 56 of 56 Posts

·
Moderator
Joined
·
1,973 Posts
Those are some really nice parts, too bad they were installed by some incompetent mechanics. I'd be asking for my money back, wouldn't let them get near the car again. I also diy everything for the same reasons.
 

·
Registered
Joined
·
15 Posts
Nothing worse than paying someone to do a job and then having to do it your self. That is disappointing . Let us know what you think of the suspension set up once you get it sorted. I did a a bilstien coil over convention on my e34 m5 and was never super happy with it. It was just too firm for a the rough roads here in Alberta.
 

·
Registered
Joined
·
6 Posts
I can't believe the coilover install!! Zip tied the spring, missing helper spring... not cheap labour either. I'd remove and install again to see what else they did or didn't do.
 

·
Registered
Joined
·
49 Posts
Discussion Starter #45
Shop said they will look at it and 100% stand with their work, they will do any change till I am happy. However they did not admit to any fault even after I sent them the pictures. For the missing helper spring, they said they can not put it on due to front wheel rubbing with my requested ride height and they believe the front spring will be compressed at normal ride height so the spring wont move and it won't be a problem. I can't believe they seems to have ignored the fact that you can fly over some section of the track so you spring may fully extend then land heavily. They also have no idea why the front wheel sitting has changed. Sounds like they have no experience on lowering our car at all. With McPerson suspension, you may need to increase caster a bit while lowering the car in order to keep the same wheelbase, they seems dont know that at all.

I have ordered another pair of wheel spacer for the front in order to have a bit more space for the shock and will keep everyone updated after I come back from the shop.
 

·
Registered
Joined
·
49 Posts
Discussion Starter #47
Isn't MCS supposed to be available only from suspension specialists? I'd report the shop to MCS.
Yes, you can only buy from their dealership. I will give the shop a chance to fix the problem, if no result, I will talk to MCS directly.
 

·
Moderator
Joined
·
1,973 Posts
Why would you trust the shop that clearly has no business being in the suspension business? I mean defending zip tying the spring? Wtf. Call mcs and make sure they stay on top of your issue (if they care that is).
 

·
Registered
Joined
·
49 Posts
Discussion Starter #49
I dont trust them but they have my money already, rather than spend a lot of my valuable time to get my money back, I would rather have them get it done, at least I will keep both my eyes on my car while they are working on it.
 

·
Moderator
Joined
·
4,341 Posts
Could the mistake be with the thrust arms and the tie rods? It seems weird that the camber-caster plates would alter the wheelbase is such a dramatic way.

There are a few things that are somewhat logical:
-You certainly can run without helper springs in the front & rear
-I googled the shop and their FB has your car on there, looks like they did try the setup with the helper installed
-The zip ties seem to suggest they where thinking ahead to keep the spring aligned and in place at full extension
-The back helper+spacer, where those specifically chosen by the shop, or are they packaged by Eibach

Not trying to defend the shop, but these hurdles are very common when putting together high dollar builds where you're choosing specific components, and setups.
 

Attachments

·
Registered
Joined
·
49 Posts
Discussion Starter #51
Could the mistake be with the thrust arms and the tie rods? It seems weird that the camber-caster plates would alter the wheelbase is such a dramatic way.

There are a few things that are somewhat logical:
-You certainly can run without helper springs in the front & rear
-I googled the shop and their FB has your car on there, looks like they did try the setup with the helper installed
-The zip ties seem to suggest they where thinking ahead to keep the spring aligned and in place at full extension
-The back helper+spacer, where those specifically chosen by the shop, or are they packaged by Eibach

Not trying to defend the shop, but these hurdles are very common when putting together high dollar builds where you're choosing specific components, and setups.
They picked Eibach and all accessories. I am pretty sure they have tried different setup as the spring perch will rub with the front tire when the car is lowered. I think there maybe other way to fix this problem than just let the spring move freely at full extension. I am bringing another wheel spacer that is 5mm wider and it should fix the problem (just dont like to to even wider at the front). However my current wheel is OEM spec (255/40R19) and I have already used spacer to make it 0.3" wider than the OEM setup. If that wont clear the shock then these MCS shocks will not have a chance to fit with OEM spec if you want to lower the car.

The wheelbase issue is really strange, I checked both control arms or tie rod and I think they have been installed correctly. The shock is the only part that control camber and caster, the caster also affects the where the wheel sits. This is something I need them to explain, they should have noticed the wheelbase change before give me the car.
 

·
Registered
Joined
·
49 Posts
Discussion Starter #52 (Edited)
As I am stripping off the interior trims to prepare roll bar, I now have a better idea how light this car can go. It appears that 3300 lbs is only possible when someone want a complete track build without any interior trims. Here are some useful weight information:

Trims and sound dampening in rear trunk: 23 lbs
Speaker amplifier and radio box inside the back trunk: 10 lbs
Rear seats: 38 lbs
Rear seats sound dampening: 8.5 lbs
Rear (door) panel (including speakers): 6.1 lbs x 2
Rear (door) panel sound dampening: 6.1 lbs x 2
Rear trunk trim and sound dampening right behind rear seat under rear windshield (including speakers): 18 lbs

Total: 120 lbs.

I have not yet touched the roof, airbags, front seat and door panels, floor carpets, dash, firewall and heat insulation. The CD and DVD will also go away for sure. My guess is another 150 to 200 lbs room at the front of the car.

There are other places that can save weights as well: the hood I ordered has same weight of OEM which is 28lbs which I dont like, I think it can go down to around 10 lbs with a proper build. I also ordered a set of BBS FI-R wheel just for track use, those wheels will save me 27 lbs at four corners which is amazing. As I have ripped out audio system, navigation and some other electricals, I can remove some of the wire harness carefully, I am very sure that will be 20 lbs at least. That will bring the weight of the car down to 3400 lbs easily. I know HVAC system is very heavy but I do need climate control so they will stay.

So far I have not yet touched the engine and exhaust. My plan is to finish my light weight build and go to 5.7L stroker with DCT swap. With an aftermarket catless header and custom built light weight exhaust system, I can save additional 70 lbs. So technically speaking, the car can down to 3300 lbs and even less. If someone want to push to the limit, the front bumper, fender and doors can be made by carbon fiber, that will cut more weight as well but I have no idea how much they will be.

On the other hand, I will put most trims and a few sound dampening materials back after the cage has been installed. Like I said in the beginning, I dont want it to be ugly so I think my final build will be close 3400 lbs.
 

·
Registered
Joined
·
17 Posts
This is awesome! Love what you’re doing to the car. I also have a 10 M6 and would love to do some of these things!

Could you explain more how you put on the CCB kit on the car? Also, love how the M3 wheels look!

Ismael


Sent from my iPhone using Tapatalk Pro
 

·
Registered
Joined
·
49 Posts
Discussion Starter #54
This is awesome! Love what you’re doing to the car. I also have a 10 M6 and would love to do some of these things!

Could you explain more how you put on the CCB kit on the car? Also, love how the M3 wheels look!

Ismael


Sent from my iPhone using Tapatalk Pro
I posted the complete CCB guide here:

 

·
Registered
Joined
·
6,084 Posts
I know HVAC system is very heavy but I do need climate control so they will stay.
I pulled my HVAC in my e28m5. Why do you need HVAC? Any reason not to run a cool suit and driver air?

I’m using this for my front defrost:

 

·
Registered
Joined
·
49 Posts
Discussion Starter #56
I pulled my HVAC in my e28m5. Why do you need HVAC? Any reason not to run a cool suit and driver air?

I’m using this for my front defrost:

Because this is not a strictly track only car, I still want to be able to drive it to the beach or mountain during weekend. Image you packed the car and go for a lunch then come back with 100 degree inside without AC to be able to cool it down...:(
 
41 - 56 of 56 Posts
Top