[tscdennab]

Hi,

I wonder if someone manufactures a carbon-fiber sunroof glass replacement for the e90 ? I need to shed as much weight as possible from my car and I was thinking that the sunroof glass weights alot. Plus I never use it, if I knew I wouldn't have ordered it from the beginning. I know that that there are many lightweight sunroof options for the e36/e46...why not for the e90 ?

[secretsquirrel]

Are you just wanting to replace the glass with CF or remove the motor etc? If the first, you're probably just going to save 3-4 lbs for lots of money. Probably not worth it.

[onebadmofo]

Take a dump, you'll save more weight that way.

[DefactoM6]

I don't usually crap on the highest point of gravity on the vehicle, but then again, maybe you're driving on the moon...

[enrita]

get some serious lightweight 18 inch wheels. that would help.

[mycoupe]

Guys it's weight on the top of the car!!! It causes more body roll because of the distance from the center of gravity of the car.

[Streetluger06]

Try looking into the carbon roof from the M3's, they would help loose a lot of weight and lower your center of gravity more than the sunroof.

[tscdennab]

I was thinking more in terms of a "reversible sunroof delete". Take out stuff like the motor, some assemblies, etc. and replace the sunroof glass with a carbon fiber part,
like this one:

http://cgi.ebay.com/ebaymotors/Carbo...#ht_500wt_1182

I read something about the assembly weighting about 40lbs or even more.

[kdiggz]

buy a different car if u want something light. this is a heavy luxury cruiser.

[tscdennab]

Originally Posted by enrita

get some serious lightweight 18 inch wheels. that would help.

I have mine for sale and I am going with 17" ATS DTC rims.

[dyezak]

3800lbs stock without you in it. With you in it you are pushing 4000lbs stock. 40lbs removed is 1%. It takes 10% weight reduction to shave 1/10th of a second off the 1/4mi. So to even begin to make a marked improvement in performance you will need to find another 360lbs to drop.

You want a light-weight car? Go get a Lotus, or a Miata. This is a HEAVY luxury car that makes no excuses for it's weight. You are dating 2011 Cindy Crawford here...not 2004 Ally McBeal.

[tscdennab]

Originally Posted by dyezak

3800lbs stock without you in it. With you in it you are pushing 4000lbs stock. 40lbs removed is 1%. It takes 10% weight reduction to shave 1/10th of a second off the 1/4mi. So to even begin to make a marked improvement in performance you will need to find another 360lbs to drop.

You want a light-weight car? Go get a Lotus, or a Miata. This is a HEAVY luxury car that makes no excuses for it's weight. You are dating 2011 Cindy Crawford here...not 2004 Ally McBeal.

To each their own, not trying to argue with a "luxury car owner" here But by the way, the effect on the 1/4 mile trap speed of 10lbs taken off your 335i is equivalent to the effect of adding 1hp.

A lightweight battery can bring you more than an aftermarket air intake.

http://www.dsm.org/tools/calchp.htm

hp = weight * (speed / 234)^3

[DefactoM6]

Everyone is so fixated on drag racing...you guys do realize we are talking about weight at the highest point on the car, right? Take 40 lbs off of that point, and you will feel it the second you twist the wheel.

[Kerosene Hat]

Originally Posted by dyezak

3800lbs stock without you in it. With you in it you are pushing 4000lbs stock. 40lbs removed is 1%. It takes 10% weight reduction to shave 1/10th of a second off the 1/4mi. So to even begin to make a marked improvement in performance you will need to find another 360lbs to drop.

You want a light-weight car? Go get a Lotus, or a Miata. This is a HEAVY luxury car that makes no excuses for it's weight. You are dating 2011 Cindy Crawford here...not 2004 Ally McBeal.

How do you figure 3,800 lbs on a manufacturer's published number of 3,571? He said E90, not E93, right?

There, I just saved OP 229 lbs, or 6%.

[dyezak]

Originally Posted by Kerosene Hat

How do you figure 3,800 lbs on a manufacturer's published number of 3,571? He said E90, not E93, right?

There, I just saved OP 229 lbs, or 6%.

Have you actually weighed your car? Manufacturer's published weight is "dry weight". Usually that is no antifreeze, no oil, no gas, etc. I weighed my e92, 3750lbs without me. And I don't have iDrive, park sensors, or active cruise that all add weight. Add on that the OP has an e90, with extra doors etc... You don't think it's 3800lbs?

[tscdennab]

Originally Posted by dyezak

Have you actually weighed your car? Manufacturer's published weight is "dry weight". Usually that is no antifreeze, no oil, no gas, etc. I weighed my e92, 3750lbs without me. And I don't have iDrive, park sensors, or active cruise that all add weight. Add on that the OP has an e90, with extra doors etc... You don't think it's 3800lbs?

Curb weight (3594lbs advertised curb weight on 335i e90)

From Wikipedia, the free encyclopedia

Curb weight (US English) or kerb weight (UK/Commonwealth English) is the total weight of a vehicle with standard equipment, all necessary operating consumables (e.g. motor oil and coolant), a full tank of fuel, while not loaded with either passengers or cargo.[1][2]
This definition may differ from definitions used by governmental regulatory agencies or other organizations, for example, many European Union manufacturers include the weight of a 75 kilogram driver to follow European Directive 95/48/EC.[3] Additionally, organizations may define curb weight with fixed levels of fuel and other variables to equalize the value for the comparison of different vehicles.

PS: The difference in weight between e92 335i and e90 335i is 10kg (22 lbs).

[Kerosene Hat]

Originally Posted by dyezak

Have you actually weighed your car? Manufacturer's published weight is "dry weight". Usually that is no antifreeze, no oil, no gas, etc. I weighed my e92, 3750lbs without me. And I don't have iDrive, park sensors, or active cruise that all add weight. Add on that the OP has an e90, with extra doors etc... You don't think it's 3800lbs?

Have you actually thought about establishing a baseline against which to measure weight reduction? Isn't the idea of curb weight to establish the baseline weight of the vehicle? Or should benchmarks / published standards be up to each individual vehicle?


If I throw a 50lb suitcase in the trunk, have my 2 dogs and an Olympic weight set in the car, my car will weigh much more than one with a gutted interior, no A/C and an empty gas tank. With vastly different fuel economy.



Mfgr Published Curb Weight = 3,571 lbs in the source I read. Other poster saw 3,594 for E90. Round it to 3,600 and call it a day.

[JoosyJoos]

Car weight is realistically somewhere around 3600lbs.

Taking weight out of the top will definitely aid performance... not much in a straight line but going in a straight line fast is boring anyway.

You'll spent a lot of money for no real reason. Just buy an e30 with the money you would have spent on the sunroof lol

[TurboBimmer]

Without a driver and with a half tank of fuel, my car was weighted at 3530lbs. Depending on mods and equipment an E92 would be in the 3500-3600 range.

[oulaw]

Check out this link, I lost about 50lbs and meet some milfs

http://lifetimefitness.mylt.com/index.jspa

[tscdennab]

By the way, Porsche offers a lightweight Li-Ion battery as a 2000EUR option for it's GT3, GT2 RS and Boxter Spyder, for a 15-20lbs weight loss in comparison to the standard battery. Goes to show just how important any weight saving is.

http://www12.porsche.com/microsite/t...lectedVariant=

[Sniz]

Originally Posted by tscdennab

By the way, Porsche offers a lightweight Li-Ion battery as a 2000EUR option for it's GT3, GT2 RS and Boxter Spyder, for a 15-20lbs weight loss in comparison to the standard battery. Goes to show just how important any weight saving is.

http://www12.porsche.com/microsite/t...lectedVariant=

Actually that shows just how much Porsche sticks it in your ass w their options, sans lube