Weight reduction
| Original Weight (kg) | Aftermarket product and weight (kg) |
Brakes | |
| S1 MMC 2.9 kg/each | EBC 6 kg |
| S1 Eliseparts Ali Bells 5.245kg/each | |
| S1 EBC (Grooved) 5.605kg/each | |
| S1 Pagid (plain) 5.790Kg/each | |
| S2 Drilled 5.9 kg/each | Ali bells 5.0 kg |
Exhaust | |
| S1 Standard 20 kg | S1 Eliseparts Sport Exhaust 8 kg |
| K series standard manifold 3.3kg flexi pipe 3.4kg | k series full stainless steel 4-1 manifold 8kg |
| S1 Standard Manifold 3.285kg, S1 Standard Flexi Pipe 3.425kg | S1 Janspeed 4-2-1 small bore w/flexi 6.575kg |
| S1 Eliseparts 4" SCRP 2.335kg | |
| S1 Eliseparts 5" SCRP 2.235kg | |
| S1 Eliseparts 5" Sports Exhaust 7.985kg | |
Steering/Suspension | |
| S1 Front Ball Joint Mount 332g/Each | Eliseparts Aluminium Ball Joint Mount 122g/Each |
| S1 (Early) Steering Arm 368g/Each | |
| S1 (Later) Steering Arm ???g/Each | Eliseparts Lightweight Aluminium Steering Arm 300g/Each |
Engine | |
| S1 Rear Engine Mount 854g | S1 Eliseparts Adjustable Engine Mount 462g |
| S1 Magneti Marelli Alternator 5.075Kg | S1 Eliseparts Lightweight 'K' Series Alternator (steel pulley) 3.230Kg |
Interior | |
| S1 Standard Leather Seats, without Sub-frame 6.170Kg/Each | Probax Motorsport (Harness Hole) Seats, without Sub-frame 7.355Kg/Each |
| B5 Tillett seat with suede covered panels without Sub-frame /Each | B7 Tillett FIA approved race seat headrest pad only, without Sub-frame 3.7kg/Each |
Wheels | |
| S1 Standard Steel Wheel Nuts ~42g/Each (x16/ 704g) | Eliseparts Lightweight Wheel Nuts ~22g/Each (x16/ 374g) |
Door | |
| S2 w/o ali beam complete: 15.1kg | |
| S2 window mech.: 1.375kg | |
| S2 window winder: 120g | |
| S2 mirror fixing triangle: 355g | |
| S2 mirror: 405g | |
| S2 seal window: 302g | |
| S2 inner trim (plastic+leather): 705g | |
| S1 Door beam (inc hinge) : 4450g | S1 Door beam (modified, centre machined out) : 2850g |
Elise Weight Reduction
S1 Alarm Fob 20 grams
Carbon clams are hideous money compared to the weight saved, and don't save much at all unless they are autoclaved or vacuum formed. Benetec CF Front Clam 4.95 kg Vs std at 15 kg but cost £58k :( Benetec CF Rear Clam 7,2kg
Be very wary of polycarbonate side screens. They are very flexible and, with the roof fitted, flare out dramatically at speeds above 60MPH.
Early rear arch liners are 2.8 kg. Later liners are lighter.
Removing the GRP where the reversing light and fog lights are, along with the grilles and the reversing light saves about 1 kg.
The rubber seals around all four wheel arch liners (assuming you haven't ditched the arch liners) are about 200g each, and most of the boot lid seal can be removed with just token parts left in to prevent rattle giving about 1 kg of saving.
Exhaust Exige/111R Catback: 13 kg. Stage 1: 11.8 kg (saves 1.2 kg). Stage 2: 8.2 kg (saves 4.8 kg). Quicksilver Titanium: 5.2 kg (saves 7.8 kg)
S1 Weight Reduction
-13,4 kg Carbon fibre track seats (1,8 kg vs 8.5 kg) x2
-12.5 kg Titanium Exhaust system (std 16 kg vs 3.5 kg)
-11.2 kg MMC discs instead of iron disks (2.7 kg vs 5.5 kg each)
-11,1 KG TRM FSL001 instead of std AWI 5 spoke Wheels (20,7kg vs 31.8 kg)
-9,9kg Race battery (www.voltphreaks.com or www.braillebattery.com) (1,36 kg vs 11.35 kg)
-9.25kg 1/2 size alloy fuel tank
-7.25 kg Lexan front window (5 kg vs 12.25 kg)
-6.8 kg Speedline Magnesium instead of std AWI 5 spoke (25 kg vs 31.8 kg)
-6.55 kg Alloy Fuel Tank
-4.4 kg Carbon fibre fixed seat frames(2 kg and 3 kg vs 0.3 kg)
-4.4 kg Remove the door reinforcement on 2 doors
-4 kg Remove radio and speakers (radio ~1.4 kg speakers ~1.6 kg)
-3.695 kg Soft top and mountings (Top 1.807 kg, siderails 1.888 kg)
-3.3 kg Lightweight Flywheel
-2.71 kg Cat Replacement Pipe (flexi stainless) (1.587 kg Vs 4.3 kg) mild steel 1.8 kg
-2.55 kg Lightweight alternator (3.35 kg vs 5.9 kg)
-2.2 kg Billet aluminium crankshaft pulley
-2.136 kg Back window
-2 kg Alu top engine mount
-2 kg 2x Leather sill covers
-1.994 kg Rollbar cover
-1.697 kg Heat shield baggage compartment
-1,59 kg CF undertray insted of alu std
-1.388 kg Dressed baggage compartment
-1.329Kg Original Airbox and filter
-1 kg Eliseparts Lightweight Wheel studs
-1 kg Carbon fibre steering wheel (1.7 kg vs 0.7 kg)
-0,9 kg Elisparts solid 4-2-1 manifold (5,8 kg vs std 6,7 kg)
-0,9 kg Carbon fibre side mirrors instead of std
-0.872 kg Alu ball joint mounts (1.308 kg vs 0.436 kg)
-0.8 kg Footwell divider
-0,83 kg lexan back window instead of std glass
-0.6 kg Handbrake and gear stick cover
-0.562 kg Pair of Alu Verniers instead of std iron pulleys(570g v.s. 298g each)
-0.53 kg Passenger footrest
-0.5 kg Front Mud flaps
-0.4 kg Alarm siren
-0.23 kg Inner Rear view mirror
-1/2 of std Lightweight Starter Motor
-2/3 of std Polycarbonate / perspex rear/side/front screen
plastic boot lid stay 865g
2 x plastic floor mats 160g
passenger foot rest 535g
charcoal canister and pipes 625g
rear grills 310g
removal of fibre glass behind fog/reverse lights 370g
speakers including wiring 1220g
plastic speaker mounts behind seats 525g
plastic wiper motor guard 60g
rear wheel arch liners 2300g
plastic booy drain pipe 225g
front brake disc splash guards 210g
radio and surround 1760g
front grill 275g
handbrake trim surround 240g
Aerial and lead 160g
gear stick surround trim 325g
alarm siren 370g
rubber trim from rear wheel arches and boot lid 140g
interior side pads 2000g
boot bag 1435g
heat insulation/sound deadening in boot 1495g
boot divider Ali 1295g
rear under tray (homemade Carbon fibre) reduced by 900g
Rear boot tray 1620g
heat shield above exhaust (below boot tray) 1885g
misc nuts bolts cables ties etc 445g
passenger seat & belt 9725g
remove cat and replace with CRP 2725g
battery replaced by varley red top 6100g
battery bracket and breather piper 200g
S1 fibreglass engine cover inc grills 4550g
S1 Aluminium engine cover inc grills 4155g (395g saving)
Other sources of Information
http://www.340r.net/technical/weight/weight.htm
http://forums.seloc.org/t/91178