AnorexicSTI - 05 STI Lightweight w/ "full interior" - 2660lbs - 62 lbs to 2598! - Subaru Impreza WRX STI Forums: IWSTI.com
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Old 10-19-06, 03:23 PM   #1
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Default AnorexicSTI - 05 STI Lightweight w/ "full interior" - 2660lbs - 62 lbs to 2598!

The theme of my car and journal is weight reduction. I was formerly known as the "King of weight reduction" in my Honda days. I've always believed weight reduction is the best way to achieve better performance, because it helps in every respect - acceleration, braking, cornering, and also reduces wear due to less stress on components. My original goal when I started this journal was to get the car down to 2899 lbs with driver and 30-35L of gas. I weigh 165 lbs, 170 lbs with clothing and shoes. Therefore, the goal was roughly 2729 without driver. At the time, I thought that was achievable only by removing the passenger seat for track days, but I now think that is achievable with a fully functional interior including a stereo. The only functional things I've removed from the interior are the middle rear seat belt, the rear center pass through (CDN models came with it), sunvisors (can be added back in for road trips), grab handles, and the rear speakers.

New goal as of July 2007 is 2699 without driver and 30-35L of gas!!

New goal as of Sept 5th, 2007 is 2698 without drivine and 30-35L of gas! I decided this because I learned the wet weight is 3298 and I wanted to achieve 600 lbs of weight reduction!!

Table of Contents for the most relevant posts
Post 2 - Weight Reduction List
Post 4 - Weights of Aftermarket Parts
Post 5 - Weights of OEM Parts
Post 6 - Weight Breakdown of some Aftermarket Parts

Posts with pictures in them
1. Post 194 has some pics of the engine bay with the battery removed
2. Post 195 has some pics of my APR wing with Spec C trunk
3. Post 196 has some pics of my OMP Kubic steering wheel, NRG quick release, and custom steering column lowering job
4. Post 197 has some pics of my OMP Comfort Seats and 1 more of my OMP steering wheel for fun
5. Post 210 has some diameters for the stock exhaust manifold and gaskets


Last edited by AnorexicSTI; 03-19-09 at 09:42 AM.
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Old 10-19-06, 03:25 PM   #2
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Weight Reduction List

Some Notes Before I Begin
1. If you see something you weighed and disagree, PM or add to the thread and I will reweigh to confirm. I try to weigh as accurately as possible but sometimes for weird shaped items like a driveshaft, it's hard to get an accurate reading even if you put a box or milk crate on the scale and try to balance the object on it.

2. Original wet weight is 3298 lbs, therefore all reducing fluid levels (eg. gas, windshield washer fluid, intercooler sprayer fluid, coolant overflow, etc.) counts towards weight reduction. I run full brake fluid, full clutch fluid, full engine oil, full transmission oil, full differential oil, full power steering fluid, but run low gas (fill up 30L at a time only), low IC fluid, and coolant overflow on minimum. Running low engine, tranny, and diff. oil is just not worth it for obvious reasons. Running low clutch, brake, and PS fluid, although I investigated it (just have to keep checking it more often), would only result in a 0.5 lbs weight savings.

3. L = driver side for a left hand drive vehicle, R = passenger side for a left hand drive vehicle.

4. A - sign is normally used to show a weight reduction, but in cases where weight is added, a + sign is used.

5. For parts that are replaced, I put in a comparison to stock in parentheses immediately after. For example, if item X weighs 10.0 lbs and the part it replaces is 15.0 lbs, I enter the weight savings as 5.0 lbs and put (10.0 vs 15.0) in parentheses.

6. Items in italic are approximate because I forgot to weigh them for whatever reason and I may need your help to get a more accurate weight! PM me or add to the thread if you can!

Engine bay
L radiator fan - 4.5 lbs
R radiator fan - 3.5 lbs
Windshield washer fluid reservoir - about 12 lbs full
L upper radiator bracket - 0.5 lbs
R upper radiator bracket - 0.5 lbs
L lower radiator bracket - 0.5 lbs
R lower radiator bracket - 0.5 lbs
Alternator tensioner bracket and bolt - 0.5 lbs
AC compressor, lines, condenser, belt, and dryer - 19.25 lbs
AC fluid - about 0.75 lbs
AC idler pulley - 1.0 lb (remove and use shorter belt if u want to keep AC)
AC compressor "outer half of pulley" - 1.0 lb (this can be removed with the belt in about 5 min. for track use only)
AC compressor lower bolts - 0.25 lbs (only 2 bolts needed to hold it in place)
AC refrigerant - 1.25 lbs (with the help of 02wrbrex1)
Deka ETX9 battery - 25.0 lbs (7.0 va. 32.0)
Battery terminal adapters + 0.25 lbs
Battery tie down bracket - 0.5 lbs
Battery plastic cover - 0.25 lbs
+ve battery terminal wiring - 0.75 lbs
-ve battery terminal wiring - 0.5 lbs
Custom 8ga battery cable (9ft long +ve, 1ft long -ve, both with ring terminals) + 0.75 lbs
Hood liner - 1.0 lb
TB hose and bracket (coolant bypass mod) - 0.5 lbs
PS line brackets - 0.25 lbs
Group N engine mounts w/ brackets - 0.5 lbs (3.5 vs. 3.75 x 2)
Perrin Equal Length Header - 13.75 lbs (12.0 vs. 25.75)
Perrin T-bolt clamps for slip joints +0.25 lbs
Wiring bracket on top of tranny bellhousing behind slave cylinder - 0.25 lbs
Clutch MC to SC piping, brackets, and hardware - 1.75 lbs (replaced with SS hose of negligible weight)
Carbing strut brace +3.5 lbs
Turbo heatshield -1.5 lbs
Turbo heatshield bracket -0.25 lbs
Boost Logic turbo blanket +1.0 lbs
Downpipe upper heatshield -0.5 lbs (between downpipe and uppipe and below the turbo)
Invidia uppipe - 2.5 lbs (3.5 vs 6.0)
RPS WRX custom aluminum flywheel, aluminum pressure plate, ceramic/carbon aluminum disc, release bearing, pilot bearing - 15.25 lbs
Q-rack +0.5 lbs (aluminum brackets added 0.5 lbs, deletion of driver side bracket with 2 bolts deleted 0.5 lbs, but extra length/thickness of part of the 06 RS tie rod adds 0.5 lbs)
Pelco fans for TMIC +3.0 lbs (1.5 x 2)
COBB crank pulley - 4.5 lbs (1.25 vs 5.75)
NRG dampers - 0.0 lbs (weighed exactly the same 1.25 lbs as parts they replaced)
DRL controller in engine bay - 0.5 lbs
COBB downpipe w/ O2 sensor - 11.5 lbs (11.75 vs. 23.25)
L Intercooler bracket w/ 3 bolts, rubber grommet, and metal insert - 0.75 lbs
R Intercooler bracket w/ 3 bolts, rubber grommet, and metal insert - 0.75 lbs
Process West TMIC w/ all hoses and clamps + 5.25 lbs
Driver side uppipe support bracket w/ 2 bolts and 1 less nut needed for uppipe - 1.0 lbs

Front of Car - Body
Front bumper cover unnecessary mounting brackets - about 2 lbs (only kept necessary ones)
Front bumper beam - about 24 lbs
KS-tech hood vent - 1.75 lbs (stock scoop is the same weight at 2.25 lbs, but the fins add 1.75 lbs so the net loss is 1.75 lbs)

Front of Car - Underneath
U-brace w/ plastic trim but no bolts - 25.0 lbs
Transmission rear cross member vibration dampener - 1.0 lb

Interior
L CG-lock + 0.25 lbs
R CG-lock + 0.25 lbs
R driver side floor mat holder - 0.25 lbs
Cruise control - 0.5 lbs
DRL controller under dash - 0.25 lbs
Middle rear seat belt - about 5 lbs (still have to weigh it)
Rear center pass through - 6.5 lbs
Blanket to cover rear pass through +0.75 lbs
Front grab handles - 1.0 lbs (0.5 x 2)
Rear grab handles - 1.0 lbs (0.5 x 2)
Front grab handle mounting brackets - 1.0 lbs (0.5 x 2)
Rear grab handle mounting brackets - 1.0 lbs (0.5 x 2)
L sunvisor - 0.5 lbs
R sunvisor - 0.5 lbs
Metal piece in center console - 1.0 lb
OMP Comfort L front seat (reclinable) - 12.0 lbs (29.0 + 6.0 (bracket) vs 47.0)
OMP Comfort R front seat (reclinable) - 7.0 lbs (29.0 + 6.0 (bracket) vs 42.0)
OMP Kubic steering wheel w/ NRG quick release - 1.75 lbs (2.25 + 1.0 + 1.5 vs 3.75 + 2.25 + 0.5)
Rear seat brace and support brackets - about 15 lbs
Metal shifter trim - 0.5 lbs
Foam sound deadener on firewall - about 25 lbs
Vents from HVAC to rear seats - 0.5 lbs
Child seat anchors (all 3) - 2.0 lbs
Door handle brackets replaced with velcro - 2.0 lbs (0.25 lbs ea)
Front door "saran wrap" sealant - 0.75 lbs (they were more than 0.25 lbs, but less than 0.5 lbs, so I weighed them together and got 0.75 lbs)
Rear door "saran wrap" sealant - 0.5 lbs (0.25 lbs each)
L rear speaker - 0.25 lbs
R rear speaker - 0.25 lbs
L front window aligner - 0.5 lbs (the window closes and seals fine, but NOT at highway speeds)
R front window aligner - 0.5 lbs (the window closes and seals fine, but NOT at highway speeds)
Rear door theft protection - 1.0 lb (0.5 lbs per side) - I have nothing in the car to steal, an immobilizer, hidden backup immobilizer, and an NRG quick release wheel - my car will have to be towed if somebody wants to steal it)
Autospeed dead pedal +0.25 lbs (0.25 vs negligible)
Homelink mirror +1.0 lb (1.5 vs 0.5)
Motomaster 6.5W solar panel +0.5 lbs
Cable for solar panel +0.25 lbs
COBB L front floor mat -0.5 lbs (1.5 vs 2.25)
COBB R front floor mat -0.75 lbs (1.75 vs 2.25)
L rear floor mat - 2.0 lbs
R rear floor mat - 2.0 lbs

Rear of Car -Underneath
Driveshaft protection plate - 4.0 lbs
Muffler heat shield - 1.0 lb
ACPT CF driveshaft - 10.0 lbs (14.5 vs 24.5)
COBB cat back - 2.0 lbs (19.0 vs 21.0)
COBB midpipe - 2.0 lbs (9.0 vs 11.0)
Rear tow hook - 2.0 lbs
L rear muffler hanger bracket - about 2 lbs
L rear muffler hanger - 0.5 lbs

Rear of Car - Body
Rear bumper cover unnecessary mounting brackets - 4 lbs (only kept necessary ones)
Rear bumper beam - 28.5 lbs
Rear bumper beam foam - 1.25 lbs
Rear bumper beam bolts - 1.0 lbs
Rear license plate screw holder - 0.25 lbs
Spec C trunk - 11.75 lbs (11.0 + 0.75 (paint) + 0.5 (hardware) vs 24.0)
APR wing - 8.75 lbs (8.25 vs 17.0)
APR rear diffuser w/ hardware +4.5 lbs

Trunk Area
Run low intercooler sprayer fluid - about 8 lbs (used to cool IC + spray the windshield)
Spare tire - 30.25 lbs
Spare tire bolt and cap - 0.25 lbs
Spare tire cover - 4.0 lbs
Jack extension handle located under spare tire cover - 0.75 lbs
Jack - 4.0 lbs
Tools w/ carry case - 1.5 lbs
All trunk trim - about 4 lbs
Spare tire rubber pads - 0.25 lbs
Trunk springs - 2.0 lbs
Neodynium magnets to replace trunk springs +0.25 lbs

Wheels, Suspension, and Brakes
Front brake dust sheilds - 2.0 lbs (1.0 lbs per side)
Rear brake dust shields - 1.5 lbs (0.75 lbs per side)
Rear caliper vibration dampener - 2.0 lbs (1.0 lbs per side)
Front ABS sensor wire brackets w/ bolts - 0.5 lbs (0.25 lbs per side)
Rear ABS sensor wire brackets w/ bolts - 0.75 lbs (both sides)
Rear passenger brake line bracket w/ bolts -0.25 lbs
Brakeman L front rotors - 10 lbs (12.75 vs 22.75)
Brakeman R front rotor - 10 lbs (12.75 vs 22.75)
Brakeman L front caliper assembly - 3.0 lbs (9.25 - 12.25)
Brakeman R front caliper assembly - 3.0 lbs (9.25 - 12.25)
Brakeman L rear caliper assembly - 0.25 lbs (3.25 - 3.5)
Brakeman R rear caliper assembly - 0.25 lbs (3.25 - 3.5)
Brakeman L rear rotor - 10.75 lbs (7.0 vs 17.75)
Brakeman R rear rotor - 10.75 lbs (7.0 vs 17.75)
Car Labs X-brace +10.75 lbs
COBB front swaybar ASSEMBLY - 2.0bs (5.0 vs. 7.0)
COBB front endlinks - 0.0 lbs (same as stock)
COBB rear swaybar ASSEMBLY - 0.5 lbs (9.75 vs 10.25)
COBB rear endlinks +0.25 lbs (1.25 vs 1.0)
Kosei 17x9 ET 45mm w/ Bridgestone RE-01R 245/40/17 tires - 8.0 lbs (43.0 vs 45.0 x 4)
Kosei 17x9 ET 45mm w/ Michelin Pilot Sport Cup 245/40/17 tires - 28.0 lbs (38.0 vs 45.0 x 4)
Project KICS Neo Chro R26 lug nuts - 0.25 lbs (1.0 vs 1.25)
Rear backing plates - 11.5 lbs (5.75 lbs per side)
Rear drum brake components - 5.0 lbs (2.5 lbs per side)
Ebrake handle assembly - 3.5 lbs
Ebrake cables - 2.5 lbs (1.25 per side)
Ebrake cable bracket - 0.25 lbs

Misc
Gas tank filler trim - 0.25 lbs
Run a maximum of 35 L gas at a time (fill 30L when there is about 5L left) - about 40 lbs
Various brackets, bolts, nuts, etc. from all over the car replaced with nothing, zip ties, or double sided tape - about 50 lbs

Last edited by AnorexicSTI; 10-02-07 at 09:13 PM.
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Old 10-19-06, 03:33 PM   #3
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where the pics at man?
__________________
2006 CGM STi, aka "Jasmine" + 2002 WRB WRX (DD)

M&J Modified
- Cobb - Invidia - Tein - Cusco - APS -
Kartboy - Hawk - Defi - walbro - Hella - Work - Pioneer - Perrin - Seibon

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Old 10-19-06, 03:57 PM   #4
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My scale reads in 1/4 lb increments. It's fairly accurate for our purposes. I have a more accurate scale that reads in 0.1 lb increments but I think 1/4 lb increments makes things easier.

Weights of various aftermarket parts
6 Gun Racing ball joint extender w/ bolt and tensioner - 1.5 lbs per side
6 Gun Racing tie rod - 2.75 lbs per pair
ACT WRX prolight flywheel - 9.75 lbs
ACT WRX HD pressure plate - 11.25 lbs
ACT WRX HD street disc - 3.5 lbs
ACT WRX release bearing - 0.75 lbs
AnorexicSTI custom rear caliper brackets - 0.5 lbs per side
AnorexicSTI custom rear ABS sensor brackets - 0.25 lbs per pair
APR side mirror w/ hardware - 1.0 lb ea
APR rear diffuser w/ hardware - 4.5 lbs
APR wing with side plates and 4 bolts - 5.5 lbs
APR wing pedestals and all hardware - 2.75 lbs
Aqua front bumper - 12.0 lbs
Brembo rear caliper w/ hardware and hose bolt but no mounting bolts - 3.5 lbs (hardware added 0.25 lbs)
Brakeman front rotor - 12.75 lbs
Brakeman #3 front pads - 2.25 lbs set of 4
Brakeman SS brake lines - 0.25 lbs per corner
Brakeman rear revolution rotor - 7.0 lbs
Brakeman rear F3 caliper with hardware - 3.25 lbs
Brakeman #3 rear pads - 2.25 lbs set of 4 (new pad depth 8 mm)
Buddy Club CBE without the muffler silencer - around 15.5 lbs (courtesy of Crazy Owen on NASIOC)
Buschur Racing Crucial Racing coated downpipe - 10.25 lbs
Buschur Racing Crucial Racing coated midpipe - 4.75 lbs
Buschur Racing Crucial Racing coated axlepipe - 7.0 lbs
Buschur Racing Crucial Racing coated muffler - 9.25 lbs
Carbing Strut Brace - 3.5 lbs
COBB front endlinks w/ all hardware - 1.0 lbs for the PAIR
COBB rear endlinks w/ all hardware - 1.25 lbs for the PAIR
COBB axleback w/ bolts, nuts, and gasket - 19.0 lbs
COBB midpipe w/o hardware - 9.0 lbs
COBB turbo heatshield - 1.5 lbs
COBB crank pulley - 1.25 lbs
COBB L front floor mat - 1.5 lbs
COBB R front floor mat - 2.0 lbs
COBB DP w/ O2 sensor - 11.75 lbs (O2 sensor by itself - 0.25 lbs)
COBB front swaybar w/ bushings - 5.0 lbs
COBB rear swaybar - 7.0 lbs
COBB rear swaybar D-brackets, bushing, bolts w/ washers - 0.75 lbs (both sides)
COBB rear adjustable swaybar bracket w/ 4 adjusting bolts and washers - 1.0 lb per side
Crucial Racing uppipe w/ studs - 3.25 lbs
Crucial Racing coated intake manifold - 7.75 lbs
Crucial Racing coated throttle body w/ MAP and TPS - 2.25 lbs
Custom BMW X5 retrofitted HID headlight assemblies - 5.75 lbs per side
Ferrodo DS2500 front pads - 2.5 lbs set of 4
Ferrodo DS2500 rear pads - 2.25 lbs set of 4
Goodridge SS brake lines - 0.25 lbs per corner
Grimmspeed Uppipe - 4.5 lbs (48mm inlet, 44 mm outlet - I expanded to 50mm inlet, 46mm outlet)
Gruppe-S header with Jet Hot coating - 17.75 lbs (O2 sensor adds 0.25 lbs for 18.0 lbs total)
Guardian Windshield - 27.75 lbs (scale fluctuated between 27.5 and 27.75 lbs)
Invidia uppipe w/ studs and pipe plug - 3.5 lbs
JiC Ti exhaust w/ all hardware but no silencer - 11.5 lbs
Kosei K-1 TS w/ Bridgestone RE-01R w/ center cap and alum hub ring (0.25 lbs for cap and ring) - 43.0 lbs (1 was 42.5)
Kosei K1 TS light grey wheels w/ Michelin Pilot Sport Cup 245/40/17 - 38.0 lbs (1 was 38.25)
KS-tech hood vent / all hardware - 2.25 lbs
NRG short hub w/ 6 screws - 1.0 lb
NRG quick release - 1.5 lbs
NRG hood dampers w/ hardware - 1.25 lbs total (both sides)
Ohlins coilovers - 13.0 lbs per corner (courtest of EvilSTI7)
Ohlins Flag front coilover assembly with spring and camber plate - 15.0 lbs per side (14.75 lbs without unnecessary ABS wire bracket and bolt)
Ohlins Flag front camber plate assembly - 2.25 lbs per side including plate that keeps reservoir from rotating
Ohlins Flag rear coilover assembly with spring and pillowball plate - 16.0 lbs per side
OMP Kubic wheel w/ horn and horn surround - 2.25 lbs
PDE camber plates - 2.25 lbs per side
Pelco fan for TMIC - 1.5 lbs
Perrin Equal Length Header - 12.0 lbs
PPG Windshield - 28.0 lbs (scale fluctuated between 27.75 and 28.0 lbs)
Process West TMIC w/ all hoses and clamps - 18.0 lbs
Project KICS R26 Neo Chro lug nuts (20) - 1.0 lbs
Q-Rack Quick Steering Rack w/ tie rods and custom welded aluminum brackets - 18.0 lbs (brackets add 0.5 lbs, extra length and thickness in certain areas of 06 RS tie rods add 0.5 lbs!)
Redline PS fluid (approx 1L) - 2.0 lbs
RPS WRX custom flywheel - 10.0 lbs
RPS WRX custom aluminum pressure plate - 7.5 lbs
RPS WRX custom ceramic/carbon aluminum disc - 2.0 lbs
RPS WRX release bearing - 0.75 lbs
Stromung catback exhaust - around 30.5 lbs (courtesy of jazmak24 on NASIOC)
Stromung catted downpipe - around 12 lbs (courtesy of jazmak24 on NASIOC)
Subaru Group N tranny mount - 3.0 lbs
Subaru Group N engine mounts - 3.0 lbs each
Subaru Group N engine mount brackets - 0.5 lbs each
Subaru Spec C trunk - 11.0 lbs, 11.75 with paint
Subaru JDM rain visors - 1.25 lbs for both
Target fleece blanket - 0.75 lbs
TiC fender braces - 1.75 lbs for both
TiC rear diff mount bushings w/ hardware - 0.75 lbs
TiC tranny crossmember bushings - 0.25 lbs
TiC outrigger bushings w/ hardware - 0.5 lbs
TiC rear tranny stay, shift linkage, and pivots bushings w/ hardware - 0.25 lbs
Unorthodox Racing crank pulley (underdrive) - 14.6 oz (1.0 lbs)
Unorthodox Racing alternator pulley - 2.8 oz (0.25 lbs) (stock is 5.8 oz)
Unorthodox Racing power steering pulley - 6.6 oz (0.5 lbs)
Whiteline subframe lock bolts - 0.5 lbs
Whiteline ALK - 2.75 lbs for both

Submitted by other members
APS TMIC w/ all brackets, hoses, and clamps - 21.75 lbs (courtesy of Jackie at Annapolis Subaru)
Helix V3 Uppipe with Crucial coating - 4 lbs (courtesy of La Mer)
MonsterSports CF Trunk lid (not painted) - 8lbs (courtesy of La Mer)
S202 Replica Wing in CF (not painted) - 8lbs (courtesy of La Mer)
Trust Power Extreme Ti-R catback - full Titanium with no resonators. It is very loud. It weighs 5.8kg vs factory of 16.4kg" (courtesy of STI8U)
"Trust Power Extreme Ti-R catback - full Titanium with no resonators. It is very loud. It weighs 5.8kg vs factory of 16.4kg I believe..." (courtesy of STI8U)
"The V-mount wasn't working well - intake temps (post I/C) of 78C on the track, coolant temps of 104C. Blew one engine with this setup so not going there again. I guess I went APS (725) just cause of the name etc. You are right it is so freakin heavy, I'm a bit disappointed." (courtesy of STI8U)
Volk CE28N Bronze 17x8.5 50mm ET - 16.7 lbs
Volk CE28N Bronze 17x9 48mm ET - 17.2 lbs

Last edited by AnorexicSTI; 01-15-09 at 08:42 PM.
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Old 10-25-06, 04:12 AM   #5
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Weights of various stock parts

Engine Bay
Downpipe w/ O2 sensor and heat shields - 23.25 lbs
Intercooler w/ metal Y-pipe, turbo to IC hose (+2 clamps), IC to TB hose (+2 clamps) - 12.0 lbs (11.0 lbs without both hoses and 4 clamps)
L Intercooler bracket w/ 3 bolts, rubber grommet, and metal insert - 0.75 lbs
R Intercooler bracket w/ 3 bolts, rubber grommet, and metal insert - 0.75 lbs
Engine crossmember - 2.75 lbs
Engine mounts w/ heat shield - 3.0 lbs per side
Engine mount bracket - 0.75 lbs per side
Hood rod, rubber grommet, rod stay, rod stay bolt into rad - 1.25 lbs
Stock tranny mount - 3.0 lbs
Stock exhaust manifold assembly with all heatshields and bolts (except the ones needed to install the Gruppe-S header) - 25.75 lbs
Front plastic undertray w/ 5 bolts - 3.0 lbs
Starter w/ nut and washer for ring terminal - 7.0 lbs
Battery 32.0 lbs
Negative battery terminal grounding cable (goes from battery to body and tranny) - 0.5 lbs
Positive battery terminal (goes from battery to starter) - 0.75 lbs
Stock flywheel - 19.0 lbs
Stock pressure plate - 13.0 lbs
Stock clutch disc - 3.75 lbs (weighed in at 3.5, but with material taken off I estimated 3.75 lbs)
Stock release bearing - 0.75 lbs
Flywheel dust shield w/ 2 bolts - 0.25 lbs
Alternator w/ pulley - 11.5 lbs
Alternator pulley - 0.25 lbs
ALT/AC aluminum mounting bracket - 2.0 lbs
ALT/PS aluminum mounting bracket - 1.75 lbs
Stock steering rack with tie rods - 17.0 lbs
Steering rack driver side bracket w/ 2 bolts - 0.5 lbs
Steering rack metal lines and remnant fluid - 2.75 lbs
PS pump w/ pulley, with reservoir, rubber lines, and fluid - 7.25 lbs
PS pulley - 0.75 lbs
Stock uppipe w/ heat shield - 6 lbs (4 lbs without)
Downpipe upper heat shield (below turbo and between downpipe and uppipe) - 0.5 lbs
Turbo heatshield - 1.5 lbs (forgot to weigh before I sold it but estimated to be same as COBB)
Turbo heatshield bracket - 0.25 lbs
Stock crank pulley - 5.75 lbs
Stock timing belt plastic covers - 0.75 lbs ea (3 of them - driver, center, passenger)
AC compressor, lines, condenser, belt, and dryer - 19.25 lbs
AC fluid - about 0.75 lbs
AC idler pulley - 1.0 lb (remove and use shorter belt if u want to keep AC)
AC compressor "outer half of pulley" - 1.0 lb (this can be removed with the belt in about 5 min. for track use only)
AC compressor lower bolts - 0.25 lbs (only 2 bolts needed to hold it in place)
AC refrigerant - 1.25 lbs (with the help of 02wrbrex1)
Stock headlight assemblies - 4.0 lbs per side
Transmission - 189 lbs (approx)
Downpipe bracket that bolts to transmission w/ 3 bolts - 1.0 lb
Driver side exhaust cam gear - 1.0 lbs
Passenger side exhaust cam gear - 1.0 lbs
Oil pan - 4.25 lbs

Front of Car - Body
Stock STI hood scoop w/ all hardware - 2.25 lbs
Stock STI hood scoop airflow director w/ all hardware - 1.75 lbs
Stock side mirrors - 2.25 lbs ea

Front of Car - Underneath
Tranny lower cross member - 2.75 lbs
Tranny upper crossmember - 5.0 lbs
Stock tranny crossmember bushings - 0.25 lbs
Sideskirts - 2.75 lbs per side
Front bumper cutout for FMIC and with both OEM foglight covers installed - 8.75 lbs (was probably closer to 11 lbs bone stock before the cutting!)

Brakes, Suspension, Wheels
Front spring/damper assembly - 20.0 lbs
Rear spring/damper assembly - 20.0 lbs (it's taller but for whatever reason, is the same weight as the front)
Front swaybar w/ bushings - 7.0 lbs
Front endlinks w/ hardware - 1.0 lbs
Rear swaybar - 8.25 lbs
Rear endlinks w/ hardware - 1.25 lbs
Rear rear swaybar D-bracket, bushings, and bolts - 0.25 lbs per side
Rear sway D-bracket bracket - 0.75 lbs per side
BBS 17x9 wheel w/ Bridgestone RE070 tire - about 45 lbs
Lug nuts (all 20) - 1.25 lbs
Front brake pads - 2.25 lbs
Brake lines - 0.25 lbs per corner
Rear ABS sensor wire brackets w/ bolts - 0.75 lbs (both sides)
Rear passenger brake line bracket w/ bolts - 0.25 lbs
Rear ebrake cable brackets w/ bolts (replaced all with zip ties) - 0.75 lbs (both sides)
Ebrake cables - 1.25 lbs per side
Ebrake handle, 2 nuts, 1 bolt, screw, and indicator light sensor - 3.5 lbs
Ebrake cable bracket w/ nut - 0.25 lbs (behind ebrake handle)
Rear rotors - 17.75 lbs per side
Rear Brembo caliper w/ hardware and hose bolt but no mounting bolts - 3.5 lbs per side
Rear Knuckle assembly w/ hub, ABS ring, and backing plate - 22.25 lbs per side (17.5 lbs without backing plate)
Backing plate - 5.75 lbs per side
Rear drum brake components - 2.5 lbs per side
OEM Anti Lift Kit bushing assembly w/ 2 washers and nut - 1.75 lbs per side - pin piece - 1.25 lbs
Tie rod - 1.0 lb

Rear of Car - Underneath
Midpipe with cat - 11.0 lbs
Axleback exhaust - 21.0 lbs
Gas tank heat shield - 4.75 lbs (I thought this would weigh 1.5 lbs... pleasant surprise!!!!)
Gas tank plastic splash guards - 0.25 lbs for both

Interior
Clockspring w/ wiring - 0.5 lbs
STI airbag - 2.25 lbs
STI steering wheel - 3.75 lbs
Homelink mirror - 1.25 lbs bare mirror, 0.25 lbs bracket, wiring, and hardware
Rearview mirror - 0.5 lbs
Rear seat back - 11.5 lbs
Rear center pass thru - 6.5 lbs
Rear seat cushion - 8.5 lbs
Rear pillar upper trim w/ 2 screws - 0.5 lbs
Rear pillar lower trim w/ pop-it - 0.5 lbs
Centre pillar trim w/ pop-it - 1.0 lbs
L front floor mat - 2.25 lbs
R front floor mat - 2.25 lbs
L rear floor mat - 2.0 lbs
R rear floor mat - 2.0 lbs

Rear of Car - Body
Trunk 24.0 lbs
Spoiler 17.0 lbs
Rear bumper cover w/ license plate - 10.25 lbs
Stock rear diff mount bushings - 1.0 lb

Last edited by AnorexicSTI; 01-15-09 at 08:45 PM.
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Old 10-25-06, 04:16 AM   #6
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Weight breakdown of Brakeman front brake setup (per corner)

Rotor - 12.75 lbs
Caliper - 5.0 lbs
Pads - 2.0 lbs (initial pad thickness is 15.5 mm)
Bracket w/ bolts 2.0 lbs
SS brakeline - 0.25 lbs
Total - 9.25 lbs w/o rotor, 22.0 lbs w/ rotor

Weight breakdown of stock Brembo front brake setup (per corner)

Rotor - 22.75 lbs
Caliper - 8.5 lbs
Pads - 2.25 lbs
Bracket w/ bolts 1.25 lbs
Rubber brakeline - 0.25 lbs
Total - 12.25 lbs w/o rotor, 35.0 lbs w/ rotor

Weight breakdown of Brakeman rear brake setup (per corner)

(coming soon)
(initial pad thickness is 6.5 mm)

Weight breakdown of WBR FMIC kit
Core - 21.75 lbs
Return lower pipe - 1.25 lbs
Return upper pipe - 1.75 lbs
Hot lower pipe - 0.75 lbs
Hot upper pipe - 1.5 lbs
All 5 hoses - 1.5 lbs
BOV adapter - 0.5 lbs
All clamps - 1.75 lbs
Mounting beam - 4 lbs
Overflow bottle - 0.5 lbs
Total - 34.75 lbs

Weight breakdown of TXS FMIC kit and SSAC core (courtesy of Swine)
TXS core - 25lbs
Piping with couplers and T-bolts - 16lbs
SSAC core - 19lbs

Last edited by AnorexicSTI; 07-21-07 at 11:16 PM.
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Old 10-25-06, 04:17 AM   #7
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ddddd

Last edited by AnorexicSTI; 07-21-07 at 11:13 PM.
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Old 10-25-06, 04:21 AM   #8
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Last edited by AnorexicSTI; 07-21-07 at 11:11 PM.
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Old 10-25-06, 04:22 AM   #9
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Weight of my car in Oct of 2006

Weighed it on a truck scale... 2950 lbs with half a tank of gas... no driver... goal is to get it to 2899 with driver and full interior (ok, pass seat removed is ok )... so another 211 or so lbs to go!

Let's see what I got planned:

Brakeman rotors - 20 lb savings
Lightweight wheels and tires - 30 lbs
Lightweight coilovers - 30 lbs
Rear 2 piece rotors? - 15 lbs
Spec C trunk - 15 lbs
S203 replica wing to replace STI wing - 10 lbs
No passenger seat (track only) - 35 lbs
ACT Prolite flywheel - 9 lbs

The compressor is about 10 lbs... the whole AC system is relativel light... I think about 30 lbs total... the Honda ones add about 50 lbs+ to the car... the Subaru ones are relatively weight efficient... here's another idea... if u want to have the best of both worlds, remove the belt in the fall, spring, and winter...

I also replaced the idler pulley to save 1 lb... I got a smaller belt and held the AC compressor up and tightened the bolt with my air ratchet ...

but for winter, I am contemplating just removing the belt all together to free up a bit of HP... and I could remove the outer portion of the pulley for winter to save another 1 lb (the part with the magnets).

Last edited by AnorexicSTI; 07-21-07 at 11:15 PM.
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Old 10-25-06, 05:17 AM   #10
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Stereo System
The radio is 6 lbs, but the speakers are super light. The rear speaker on my 05 STI weighed a whopping 1/4 lb... I have a digital scale in 1/4 increments... and it barely registered on the scale lol... the fronts were 1/2 lb... which is good... shows Subaru was really weight conscious with this car.

I want to replace that heavy 6lb deck though... with a lighter aftermarket unit with better performance (the regular 1 DIN size, not the double size Subaru one)... recommendations?

Battery Location
I've thought about the best location and I'm not sure right at the back is the best place... under the passenger seat would be the lowest point in the car and at least if u took the pass. seat out for track days, you'd have a 9.5 lb "passenger" lol. The back would require a lot more cable (which is heavy) and is higher up in the car and also more at the end (increasing the polar moment of inertia).

FMIC
Ah yes... to FMIC or not... that's a tough call... I decided on a WBR FMIC... it apparently weighs 41 lbs in the box, so I'm assuming 37 lbs without the packaging... 1 lb for the coolant reservoir included... so that is 36 lbs compared to 12 lbs for the stock IC and 1 lb for the brackets and hoses... so it's about 23 lbs heavier than stock... it's right at the front, but at least it's lower than the TMIC... so it sort of balances out location wise.

Washer Fluid Reservoir Removal
I've been considering this for a long time... in fact, I've been wanting to make my own coolant reservoir out of a 1L bottle (to save 1 lb from that HONKING reservoir)... I already run REALLY LOW fluid levels... that alone saves a lot of weight.. water is 2.2lbs per liter! Ok... one concern I had though... if you use the IC spray as the windshield spray, what do you fill it with? If you fill it with windshield washer fluid, is that ok for the TMIC? I guess it would be constantly cleaned! And I guess the other issue is that fluid is relatively expensive if you want to use it as IC spray... I know it's only like $4 for a gallon, but damn I go through 2L a week on the IC spray... seems "wasteful" even though it's not that much money relative to our gas and maintenance costs.

However, in the winter, you could argue you one uses the IC spray a lot less and the wiper fluid a lot more... and in the summer, the IC a lot more and the wiper fluid a lot less... so maybe fill with super diluted washer fluid in the summer and undiluted fluid in the winter.

Ok.... so I just did this mod tonight... saved 4 lbs (1 lb for the container and 3 lbs of fluid I usually carry)... it's kinda cool hitting the spray button to get the windshield washer fluid sprayed... it was fun!!

More Weight Reduction
I also removed the AC belt since it's winter... and the outer pulley with the magnets... this saves another 1 lb and is easily removed and replaced... so when summer hits, I will put it back... also removed the 2 bottom bolts for the AC compressor... this saves 1/4 lb... only 2 bolts are required to hold up that AC comp. if there is no "load" from the belt... even when I put it back on, as long as the belt is not on super tight and literally "yanking" on the compressor, I don't think more than 2 bolts are necessary... I will prob. leave them off and then monitor it for a while... if no problems come up, I will leave the 2 bolts off.

Also removed the Alternator tensioner bolt and spacer to save another 1/4 lb... simply hold up the alternator with your hand and tighten the bolt... u can get the same tension (1/4" deflection) without the tensioner... tighten up the other bolt and you're good to go... I see no reason why both bolts, if tight, will loosen enough for the alternator to slide down.. there is enough friction between the surfaces to hold it in place. The tensioner bolt is more a convenience thing... once it's in place, you tighten the other bolt to clamp it down anyways... so that tensioner bolt really doesn't do anything once everything is tight. Oh, and I replaced the clamping bolt with a shorter one to save 1/10 lb since I am no longer using the spacer.

Wow, without the AC belt, it is like lightening the crank pulley another 2 lbs... My impression is a roughly 1% improvement... with the stock pulley at 5 lbs and my COBB at 1 lb, it felt like a 2% improvement... dyno numbers have backed this up... freeing up about 6WHP... or about 2% of 300... it also felt roughly the same as ditching 60 lbs (roughly 2% of 3000 lbs) out of the car... so it makes sense that a further 2 rotational lbs less to "accelerate" would equate to a roughly 1% gain in freed horsepower.... felt very much like removing my passenger seat, which is about 30 lbs (stock is 42 but I have an aftermarket one)... or 1% of 3000 lbs.

Replacing the rad fan with a tiny 172mm x 150 mm computer fan?

http://www.frozencpu.com/products/25...l?tl=g36c15s73

This would save me 3 lbs... stock fan is about 4.5 lbs... this one is about 1.5 lb...

When out at the track, the fans never come on... with water wetter and only 10% coolant, I found it took about 10 minutes before the temperature started to rise in my honda... so I ran no fan in that car... only time I had problems was lining up to get my car aircared or waiting at the border crossing... for aircare, I put the fan back in... for waiting at the border, I sometimes had to shut the engine off... but with the constant starting and shutting off, that came close to killing my 9.5 lb battery ... it was quite the balancing act getting through without killing my battery or overheating my car at times... but that was for summer only... fall, spring, and winter I could get through no problem even if the border guards were searching everybody...

so the compromise I thought of is a tiny fan that could be on "all the time" when in situations like that... since the stock fan seems to come on full force for a few seconds and then go dormant for about 1-2 minutes... so in effect, I am decreasing the CFM of the fan but increasing the "duty cycle"... what do you think?

Last edited by AnorexicSTI; 07-21-07 at 11:14 PM.
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