njesper
Sr. Member
Posts: 128
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« on: December 01, 2009, 11:31:51 am » |
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Dear fellow murena dudes, LETS GATHER WEIGHT INFO... I will collect all weighings in the top of this topic, as the thread expands. If interested, please write "name: kg". Any lighter versions can be written afterwards. Hereby, we can all get an overview of what could be weight reduced, by replacing with/manufacturing lighter parts, if anyone's interested. (personally, I request the weight of the trunk (bare box), if anybody has had the chance to weigh this. ) ***PLEASE KEEP THE POSTS SHORT and SERIOUS - ONLY PARTS AND FIGURES PLEASE *** Parts weight list- 1.6 (whole car) 951kg - stated by Titus
- 1.6 (whole car) 1060kg - stated by Oskar
- Front Liner Tray: 3kg
- Roof Panel: 5kg
- Rear Tail Glass: 16kg (A001)
- Rear Quarterlight Glass: 1kg (A002)
- 2.2 rear trailing arm 10.5kg complete right side
- 2.2 short axle (drive shaft) 7.0kg
- 2.2 long axle (drive shaft) 9.7kg
- Engine cover 5.2kg
- Wheel bearing 800g
- Wheel hub 1.7kg
- 2.2 Rear trailing arm 8kg
- Rear brake caliper assembly (no pads) 3.5kg (A003)
- Fuel tank with sender unit 5.2kg (A004)
- Gearstick plastic console 88g (A005)
- Heater Matrix and Control Box 3.8kg (A006)
- Ventilation Fan 1.9kg (A007)
- Under body guard 1150g (A008)
- 2.2 Engine (no gearbox, intake, exhaust manifolds). (Politechnic Cam Cover fitted) 151kg
- 2.2 Murena Gearbox 48kg
- Metal radiator guard 488g (A009)
- Metal radiator guard brackets 83g (A010)
- trunk 15.5kg
- stripped door panel with speaker hole 2kg
- Xu9J4 (mi16) Engine (dry, with flywheel, alternator & starter) 132.7kg
- Panel under heater motor 245g (A011)
- Original drivers seat 13kg (A012)
- ..
Alternatives listSuggestions for reducing weight- Removing the interior, e.g. door cards and engine bay cover.
- Devil exhaust 15kg
- Pull out old seats (3), and replace with 2 lighteight racing seats.
- Vacume out, and replace it with a simple UP28 Brakepump in the front.
- Remove headlight system, use modified foglights instead.
- Standard carpet is heavy replace with lighter synthetic.
- Lexan windows, except for windscreen. (safety)
- Get of the airfilter an replace it with a pancake type.
- Put on 1 light sportmirror on the left and put the shitty Vitaloni's in the bin, or better, sel them on ebay.
- A Titanium Exhaust would reduce weight on ones car (and wallet) and reduces the Polar Moment of Inertia.
- Magnesium Alloy wheels would also reduce weight on ones car (and wallet) and reduce the Unsprung Weight.
- Smaller battery
- DIY Carbon fabrication link: http://carbonmods.co.uk/
- Smaller battery
Notes Weight distribution focus on the rear of the car to start with (weight distribution 40/60)
Polar Moment of Inertia: This term refers to how difficult it is to get an object to rotate on an axis. The farther away from the axis of rotation the mass is, the harder it is to make it turn. Conversely, if the mass is concentrated near the centre, it is easier to make it turn. Mid engine cars usually have a low polar moment of inertia which makes it easier to make them rotate, and therefore easier for them to turn. However, mid engine cars will react more quickly to changes in tire angle (they turn faster) but this also means that they are inherently easier to spin as well.
Sprung vs. Unsprung Weight: Sprung weight is any part of the car that is supported by the suspension, and only moves when the suspension is active. That means that unsprung weight is any part that is directly connected to the road without cushioning from the spring, i.e. wheels, brakes, suspension arms.
Removing unsprung mass is a more effective than reducing sprung mass as it does have handling benefits. The lighter the wheel and other unsprung components, the easier it is for the tire to follow bumps in the road. On a vehicle with extremely high unsprung weight, the inertia of the wheel and associated assembly can't move fast enough to follow the road, resulting in a jarring, crashing ride.
Lowering the unsprung weight and rotating weight yields multiple dividends, with better acceleration, better braking, better ride, better fuel economy, and better handling. Money spent to reduce unsprung weight may be great, but it's a much better payoff than with sprung weight.Best regards, NJesper (updated until Reply #92)
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« Last Edit: July 29, 2010, 11:36:17 am by njesper »
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Oetker
YaBB God
Posts: 1097
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« Reply #6 on: December 03, 2009, 09:44:15 am » |
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quote ------- Letting the wife out on the curb lightened it by about 65 kg. ====================================== Good idea, in my case it would be 100 kg. Next ride she has to take the train
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I feel like Jonah, only my fish looks different. Murena 2.2 Red 1982. Murena 1.6 black on places.
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njesper
Sr. Member
Posts: 128
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« Reply #7 on: December 03, 2009, 05:57:49 pm » |
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PLEASE RESPECT what I wrote in the beginning.... no jokes, no off topic stuff.... just parts and figures please...
Its not meant as a discussion thread, its an info-thread... So until you have weighed anything on a scale relating to this topic, dont post here, its for your own benefit.
thanx, Jesper
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Oetker
YaBB God
Posts: 1097
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« Reply #10 on: December 03, 2009, 10:10:30 pm » |
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quote ------- though don't go for the Ferrari back. It weighs more than the glass hatch. ================================================ Not thrue, it is much lighter. My hood opens on 1 gasdamper 220 Nm, and I need 2 0f 220 Nm for the glass. If have the Kiefer Ferrarie hood. It weight aprox 70% of the glass (roughly)
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« Last Edit: December 03, 2009, 10:24:21 pm by Oetker »
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I feel like Jonah, only my fish looks different. Murena 2.2 Red 1982. Murena 1.6 black on places.
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davidewanprice
Guest
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« Reply #11 on: December 04, 2009, 06:12:59 pm » |
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There is so much weight to be stripped by just removing the interior, e.g. door cards and engine bay cover. These all weigh a tonne, the problem is that without them everything looks too stripped out, but if that’s your look then great, I’ve got various bits off my car and if you need weights, I could weigh some of them for you..
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GP
Guest
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« Reply #12 on: December 04, 2009, 07:13:16 pm » |
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Front Liner Tray: 3kg
Roof Panel: 5kg
Rear Tail Glass: 16kg
Rear Quarterlight Glass: 1kg
(Plastics4Performance Lexan Polycarbonate Rear Louvered Quarterlight: 0.25kg / See image)
Some other parts available for weighing as requested.
In my experience If weight reduction is required for performance and handling, focus on the rear of the car to start with.
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