M coupe on a diet

[BookerM3]

Originally Posted by crfine88

Slow but sure (slower than I like)

Waiting on the welder for the cage build, waitng on parts to arrive...

I am looking into a tube bender, a tube notcher & a saw. I may end up doing the bending, notching and cutting myself.

You are a brave man. This is a Royal PITA. Notching the tubes properly
for a tight fit is very time consuming.

You might as well pick up a tig welder and do it all.

[v3.0si]

Originally Posted by z4mnyc

I dont recall however stock is ~3270lbs

i was curious and so dug out my old books...

///m coupe = 3230 lbs
///m roady = 3197 lbs

3.0si coupe = 3108 lbs
3.0si roady = 3086 lbs
3.0i roady = 3020 lbs

the biggest difference is most likely the weight of the s54 vs. the n52 (i couldn't find the weights for the m54 roadies). truely, the details would also include non-RFT vs. RFT, trans weight, and suspension differences. mostly common sense, but it's still interesting data.

@crfine88

this is a wonderful build, and hope you do break that 3k lbs mark!

[ZStig]

i thought the difference between the Mroadster and Mcoupe was bigger

[v3.0si]

here's a PDF of the sales brochure for you ///m guys...

http://www.bmwz4roadster.net/brochure/ME85-ME86.pdf

[esqu1re]

^ Just the weight of the hatch and support minus the stuff used to strengthen the roadster. . .I believe...

[v3.0si]

maybe... but the weight distribution front to rear is wonky; coupe vs. roady.

coupe
frt = 50.2%
rear = 49.8%

roady
frt = 49.3%
rear = 50.7%

unless the weight of the folding mechanics in the roady is really heavy on its own, and the fixed roof is very evenly distributed (i guess that makes sense). still... the very leading edge of the roof is on the lateral centerline of the car. i would have expected the coupe to be heavier in the rear.

[Nhopkins1394]

No radio.
Why keep the antenna?
You can't hear the radio at 8,000 RPM anyway.

Also, where are you going to hold your beer can?

[Nhopkins1394]

Will it still start?

[inTgr8r]

Originally Posted by Nhopkins1394

No radio.
Why keep the antenna?
You can't hear the radio at 8,000 RPM anyway.

Also, where are you going to hold your beer can?

....that goes here.

[FDJon]

No composite hatch or windows?

hmmm...

[crfine88]

Originally Posted by Nhopkins1394

No radio.
Why keep the antenna?
You can't hear the radio at 8,000 RPM anyway.

Also, where are you going to hold your beer can?

The antenna is for aero benifit and the beer can fits very well in the location outlined bellow

Originally Posted by Nhopkins1394

Will it still start?

Now what fun would that be

Originally Posted by inTgr8r

....that goes here.

Originally Posted by FDJon

No composite hatch or windows?

hmmm...

You never know

[ZStig]

I also think there is weight saving available in the headlights... =)


keep the main front cover, replace everything else with 2 or one waterproof projector, and mold the back with thin CF. MUHAHAHA

[crfine88]

Originally Posted by Roffle Waffle

I also think there is weight saving available in the headlights... =)


keep the main front cover, replace everything else with 2 or one waterproof projector, and mold the back with thin CF. MUHAHAHA

Now we are getting serious.

[ZStig]

Only issue I can foresee is fogging up