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As I have discussed elsewhere in this website, I am a big fan of Colin Chapman’s famous mantra “add lightness.”  Carving weight out of a car improves everything about it: acceleration, braking, handling, fuel consumption, total load of Murphy’s Irish Cream Stout it can carry without bottoming out, etc.  When the decision was made to rebuild the entire car and replace the engine with the Duratec, I decided to get the car’s weight down a bit further to really shake things up.  First off, the Duratec with aluminum bell housing and Direct-to-Head Throttle Bodies would cut about 20-30lbs from the front end.  Second, going with CAT Motorsport’s alloy front hubs, and 4-pot calipers, would shave off another 15lbs. and third there were the ultra light MOG carbon fiber seats…  Okay, so now you see where this is going.  In the interest of research, I bought an accurate scale that records up to 30lbs. and began the process of weighing old parts as I remove them and new parts as they arrive from vendors.  Below is the resulting chart that I will continue to update over the next few months:

(Last updated 7/16/04)

Stock Replacement Savings
Interior Pounds Kilos Interior Pounds Kilos Pounds Kilos
Carpet set 9.125 4.139 removed 0 0 9.125 4.139
Passenger seat w/ adjustable runners 18.125 8.221 MOG carbon seat 6.063 2.750 7.813 3.551
Adjustable runners& fitting kit 4.250 1.92
Driver seat w/ adjustable runners 19.031 8.632 MOG carbon seat 6.063 2.750 8.719 3.962
Adjustable runners & fitting kit 4.250 1.92
2-Sabelt 6-pt harnesses 12.522 5.680 2-Schroth Profi II   4-point ASM        
VDO tach & speedo 1.721 0.780 SPA Technique tach w/ speedo 0.644 0.292 1.076 0.488
               
Duratec     Raceline        
Clutch 2.040 0.924 AP HD clutch 2.60 1.18 -0.56 -0.256
Pressure plate 7.340 3.330 AP HD PP 9.46 4.29 -2.12 -0.96
Flywheel 27.050 12.270 Lt. weight flywheel 10.37 4.705 16.68 7.565
Complete clutch assembly 36.430 16.524 Complete clutch assembly 22.43 10.18 14.00 6.344
Intake 8.499 3.855 45mm DTH TB w/90mm airhorns 5.34 2.42 3.159 1.435
Sump 11.41 5.175 Sump/windage tray assembly 13.12 5.950 -1.71 -0.775
      Swirl pot 1.57 0.714 -1.57 -0.714
      HP fuel pump 1.10 0.498 -1.10 -0.498
               
Crossflow              
2-40DCOE & intake manifold 16.149 7.325 45mm DTH TB w/90mm airhorns 5.34 2.42 10.809 4.905
SS exhaust manifold 9.513 4.315          
Silencer 10.847 4.920 Raceco Titanium silencer 9.031 4.100 1.816 0.820
Alternator              
Starter (pre-engaged) 8.741 3.965          
Radiator 16.513 7.490 '84 VW Golf 1.3L aluminum radiator 3.870 1.755 12.643 5.735
12" Fan 4.057 1.840          
Battery (Sears tractor) 20.701 9.390          
Bell housing 25.47 11.555 Alloy bell housing 8.38 3.8 17.09 7.755
               
Body (new in '95)     Body (new in '03)        
2-Swept wings w/ all hardware 16.324 7.404 2-Cycle wings 3.792 1.720    
2-cycle wing brackets 3.457 1.568    
2-headlight brackets 0.908 0.412    
2- cycle wings w/ all hardware 8.157 3.700 8.167 3.704
Bonnet 14.63 6.635 Bonnet 9.56 4.335 5.071 2.300
Nosecone 9.12 4.135 Nosecone 7.85 3.56 1.268 0.575
Boot box 5.38 2.440 Boot box 4.78 2.17 0.595 0.270
Locking lid 7.68 3.49 Locking lid 7.65 3.47 0.03 0.02
               
Miscellaneous              
Wiper assembly (motor, drive, arms, blades) 5.595 2.538          
Washer bag 0.573 0.260 removed 0 0 0.573 0.260
Air horns 1.517 0.688          
Spare tire carrier 2.02 0.918 removed 0 0 2.020 0.918
Spare tire (14x6 Two Gates wheel & 185/60-14 Avon CR338)     removed 0 0    
Rollover bar 7.26 3.295 Track-legal rollover bar        
               
Westfield 300mm steering wheel 2.438 1.160 Alpha 270mm wheel w/horn button & alloy hub 2.563 1.110 -0.125 -0.050
M16 front caliper 8.600 3.908 CAT 4-pot alloy caliper 4.156 1.885 8.888 (for 2) 4.046 (for 2)
Front hub     CAT alloy front hub        
Front A-arms with stock bushings     CAT wide track A-arms w/ poly bushings