Has anyone here actually weighed their vehicle?

[Arlen4369]

This is extremely impressive and where I hope to end up.

Do you have any threads documenting the loss weight?

No I don’t unfortunately but pm if you have any questions I’ll be glad to answer

[samthejam]

Nothing too remarkable here. I assume this is what most street/track oriented cars weigh without crazy carbon everything.



Things that would change the weight from stock/when I got it:

6 Speed swap
Recaro Profis with Brey Krause brackets (drivers side is electric passenger is manual rail)
Vorsteiner CF Trunk Lid
SSR Wheels on 265/35R18 RS4s
ST40 BBK
MCS Shocks
Hotchkis Front Swaybar
Nardi Steering Wheel
Megan headers, bimmerworld street track exhaust (stock section 1)
Replica CSL Bumper
OE Halogen Headlights
Driver airbag was missing and they RTV'd over the airbag light when I got the car.
Bimmerworld Race Camber Arms

Everything else is how the car came from the factory.

I usually keep a jug of coolant and some quarts of atf and oil in the engine bay drug bin. I run with it on track like that, so I assume this weight is with that in there. I want to say this was half a tank, but I can't find my notes. This was with the stock airbox.

[bigjae46]

I need to reweigh my car soon. 3020lbs with 240lbs of ballast, I weigh 223, and 30l of fuel.

30l fuel x 1.7 lb/l = 51 lbs. 3020 - 240 - 223 - 51 = 2506lbs. I'm about the install a CF dash...so should be right at 2500lbs while slowly moving the CG rearward - 50.9% Front weight distribution.

[bmw m3 s50]

This is with the gas light on. Full OE csl inside and out down to the correct insulation.

This is extremely impressive and where I hope to end up.

Do you have any threads documenting the loss weight?

[Arlen4369]

This is with the gas light on. Full OE csl inside and out down to the correct insulation.

[bigjae46]

What is the neo mag midbass in the front doors which doesn't cost a lot and will cut some weight?

Its been years. I remember Pioneer and Alpine making a reasonably priced mid. I used a pair of Hybrid Audio mids which were outstanding but they aren't cheap.

[Bry5on]

No I see the spread sheet but it is just an image, it is just not a fillable spreadsheet.

Must be the way you’re viewing the forum. I see it when logged in and also when not logged in using an incognito window.

[bmw m3 s50]

Pros: 25 lbs lighter
cons: no 6th

people claim the 5 speed is more reliable, but I think that’s bogus-- 420g is a tank, and all the 5’s seem to develop 5th gear lean.

Agreed, I also think having that extra gear is worth the weight penalty.

[bmw m3 s50]

You don’t see this? Looks like at least 3 others have. Man I’ve had so much trouble attaching excel files on here for some reason.

No I see the spread sheet but it is just an image, it is just not a fillable spreadsheet.

[bmw m3 s50]

Sound deadnening is like 30lbs, I prefer to remove it and keep more interior parts instead

Complete audio with wiring harness can be removed and just get a Bluetooth speakers and put it on passanger seat for longer ride!

Door airbags can be removed and coded like CSL.

You can drill holes into trunk hinges, cut some sheet metal and drill holes into dash bar. On the lower steering wheel cover, you can drill plastic rivets and remove the foam and metal plate. Remove the foam from dash bar, remove some foam under floor carpet.

Can also use titanium hardware!

Are there any threads about the sound deadnening removal?

I don't think I will be pulling the interior out to thin out the wiring harness, at least not yet.

Pretty sure the door airbags are gone since the car has Hard Motorsports door panels.

[bmw m3 s50]

That sounds weak...lol Making the car track only makes weight loss decisions easy but quite difficult for a street car especially if it can't be undone.

The carbon cabin filter housing would be a good weight loss opportunity. You could remove all of the rear speakers and use a nice neo mag midbass in the front doors which doesn't cost a lot and will cut some weight.

The one good thing about carbon panels - no door dings!

What is the neo mag midbass in the front doors which doesn't cost a lot and will cut some weight?

[Gt4]

You can also check this:

https://www.clubcsl.com/index.php/bmw-m3-csl-info/2-m3-csl-exact-part-differences

[bigjae46]

What Ian said. I did it mostly for weight savings as I was competing heavily in Bimmer Challenge and Global Time Attack. All the lighter, faster guys had AC delete and ZF swaps. I've since gone back to 6 speed. The ZF felt like shit even with new detents, bushings, etc.

Used to be able to get a ZF for $250-$500. Now its $500-$800 which isn't terrible. Used to be able to make it essentially a no-cost swap.

In addition to the other points, there are a lot more clutch options for the ZF 5 speed which don't cost an arm and a leg. Most popular is the E34 M5 clutch and a Sach HD pressure plate.

As far as the feel of the gearbox, a fresh ZF will be WAY better than a fresh 420g. That's one thing I noticed back in the 2000's. The ZFs are all over 20 years and maybe 30 years old so there is a lot of variance in the condition of the internals.

[S54330Ci]

Pros: 25 lbs lighter
cons: no 6th

people claim the 5 speed is more reliable, but I think that’s bogus-- 420g is a tank, and all the 5’s seem to develop 5th gear lean.

You can still get parts and rebuild services for the ZF 5 speed. No parts or services are available for the Getrag 420G. I had a 420G in my s54 powered 330Ci track car until I started getting grinding while shifting from 3rd to 4th. Once I found out parts were no longer available for the 420G I pulled it and put in a ZF with rebuilt detents. For a track car the ZF is more robust (IMO) and as mentioned, it is lighter. I don't have any 5th gear lean in my ZF but I am running an IRP shifter.

There is a ZF 6 speed that was installed in the ZHP variants. Considerably more expensive on the used market, but if you want to stay with a 6 speed this is the one to get.

[tr3flip]

Please educate me on pros and cons of ZF transmission swap.

What Ian said. I did it mostly for weight savings as I was competing heavily in Bimmer Challenge and Global Time Attack. All the lighter, faster guys had AC delete and ZF swaps. I've since gone back to 6 speed. The ZF felt like shit even with new detents, bushings, etc.