Table 1, part 2

Table 1(cont'd), Weight of Original Equipment vs Replacement Parts: 1973 Porsche 911S (All weights are in US pounds)

Research and compilation by Jim Calzia

Abbreviations: Front, Rear, Left, Right, FiberGlass, Original Equipment

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Front Suspension

Original Equipment
Factory weight
Revised weight
Replacement Equipment

Steel crossmember
11
4
OE aluminum crossmember

-
-
2
ERP aluminum crossmember

Steel A arm w/ball joint
10
5
ERP 935-style A arm (lower link, arm, and mount) w/ heim joint in lieu of ball joint

Boge "S" strut w/ Koni insert
13
13-14
Bilstein RSR strut w/insert and upper and lower spring perch

Koni "S" strut w/o insert
10.5
-
-

Weltmeister 19 mm solid torsion bar
3
-
-

Weltmeister 23 mm solid torsion bar
4.5
3.5
Faulkner 350 lb/in coil spring (2.25" ID)

Weltmeister 22 mm solid sway bar w/adjustable drop links and mounts
11
-
-

Weltmeister 22 mm solid sway bar w/arms and slider bracket
9
5
Hammill tubular sway bar w/arms

-
-
4
930 tie rod w/Hamlin's bump steer kit

Rear Suspension

Steel banana w/inner sub axle, no outer stub axle
16
12
'74 911 aluminum banana w/bearing but no stub axles

Inner and outer stub axles
6
21
'74 911 aluminum banana w/bearing, stub axles, and 5x steel wheel nuts

Non adjustable spring plate w/ hardware
5
-
-

Weltmeister adjustable spring plate w/ hardware
8.5
5
ERP 935-style spring plate w/ hardware

Weltmeister 23 mm solid torsion bar
5
-
-

Weltmeister 26 mm solid torsion bar
6
-
-

Weltmeister 29 mm solid torsion bar
7.5
4
Faulkner 500 lb/in spring (2.25" ID)

Koni shock
6
4.5
R Koni upside-down coil-over shock w/ upper and lower spring perch and hardware

Weltmeister 22 mm sway bar w/ arms, sliders,
adjustable drop links, and mounts
10-11
6
R Hammill tubular sway bar, arms, and mounts

Brakes

Original Equipment

Factory weight

Revised weight

Replacement Equipment

F aluminum "S" caliper, no pads
6
7
F 944T caliper w/aluminum adaptor for S strut, no pads

R steel M caliper
7
6
R 944T caliper, no pads

F iron rotor w/o aluminum hat
11
-
-

F iron rotor w/aluminum hat and hardware
15
7
F 12x1.25" aluminum composite Cool Rotor w/ hat (no hardware)

-
-
11
F 12x1.25" aluminum composite Cool Rotor w/ hat,
Smart Products blockoff plate and hardware

R iron rotors w/parking brake drum
13
6.5-7
R 12x1.1" aluminum composite Cool Rotor w/ parking brake drum

Wheels

Fuchs 7Jx15
12
19
HRE 9x16 wheel w/ Fuchs center

Fuchs 8Jx15
14
20
HRE 11x16 wheel w/ Fuchs center

Fuchs 7Jx15 w/23x9x15 Goodyear race tire @ 30 psi
32
38
HRE 9x16 w/Fuchs center and 23.5x10.5x16 Goodyear race tire

-
-
41
HRE 11x16 w/Fuchs center and 23.5x10.5x16 Goodyear race tire

BBS 7x15
19
38
HRE 10x16 w/BBS center and 23.5x10.5x16 Goodyear race tire @ 30 psi

"0.5" aluminum wheel spacers"
1.25
-
-

Transmission

915 5-speed transmission w/o starter motor and oil
103
-
-

915 5-speed transmission
w/Tilton starter and clutch disc but no oil
116
-
-

Half shaft w/CV joint (15-76 LOBRO)
13.5-14
10
Smart Products tubular half shaft w/lightened CV joint

Abbreviations: Front, Rear, Left, Right, FiberGlass, Original Equipment

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Table 1(cont'd), Weight of Original Equipment vs Replacement Parts: 1973 Porsche 911S (All weights are in US pounds) Research and compilation by Jim Calzia Abbreviations: Front, Rear, Left, Right, FiberGlass, Original Equipment
<<back
Front Suspension
Original Equipment	Factory weight	Revised weight	Replacement Equipment
Steel crossmember	11	4	OE aluminum crossmember
-	-	2	ERP aluminum crossmember
Steel A arm w/ball joint	10	5	ERP 935-style A arm (lower link, arm, and mount) w/ heim joint in lieu of ball joint
Boge "S" strut w/ Koni insert	13	13-14	Bilstein RSR strut w/insert and upper and lower spring perch
Koni "S" strut w/o insert	10.5	-	-
Weltmeister 19 mm solid torsion bar	3	-	-
Weltmeister 23 mm solid torsion bar	4.5	3.5	Faulkner 350 lb/in coil spring (2.25" ID)
Weltmeister 22 mm solid sway bar w/adjustable drop links and mounts	11	-	-
Weltmeister 22 mm solid sway bar w/arms and slider bracket	9	5	Hammill tubular sway bar w/arms
-	-	4	930 tie rod w/Hamlin's bump steer kit
Rear Suspension
Steel banana w/inner sub axle, no outer stub axle	16	12	'74 911 aluminum banana w/bearing but no stub axles
Inner and outer stub axles	6	21	'74 911 aluminum banana w/bearing, stub axles, and 5x steel wheel nuts
Non adjustable spring plate w/ hardware	5	-	-
Weltmeister adjustable spring plate w/ hardware	8.5	5	ERP 935-style spring plate w/ hardware
Weltmeister 23 mm solid torsion bar	5	-	-
Weltmeister 26 mm solid torsion bar	6	-	-
Weltmeister 29 mm solid torsion bar	7.5	4	Faulkner 500 lb/in spring (2.25" ID)
Koni shock	6	4.5	R Koni upside-down coil-over shock w/ upper and lower spring perch and hardware
Weltmeister 22 mm sway bar w/ arms, sliders, adjustable drop links, and mounts	10-11	6	R Hammill tubular sway bar, arms, and mounts
Brakes
Original Equipment	Factory weight	Revised weight	Replacement Equipment
F aluminum "S" caliper, no pads	6	7	F 944T caliper w/aluminum adaptor for S strut, no pads
R steel M caliper	7	6	R 944T caliper, no pads
F iron rotor w/o aluminum hat	11	-	-
F iron rotor w/aluminum hat and hardware	15	7	F 12x1.25" aluminum composite Cool Rotor w/ hat (no hardware)
-	-	11	F 12x1.25" aluminum composite Cool Rotor w/ hat, Smart Products blockoff plate and hardware
R iron rotors w/parking brake drum	13	6.5-7	R 12x1.1" aluminum composite Cool Rotor w/ parking brake drum
Wheels
Fuchs 7Jx15	12	19	HRE 9x16 wheel w/ Fuchs center
Fuchs 8Jx15	14	20	HRE 11x16 wheel w/ Fuchs center
Fuchs 7Jx15 w/23x9x15 Goodyear race tire @ 30 psi	32	38	HRE 9x16 w/Fuchs center and 23.5x10.5x16 Goodyear race tire
-	-	41	HRE 11x16 w/Fuchs center and 23.5x10.5x16 Goodyear race tire
BBS 7x15	19	38	HRE 10x16 w/BBS center and 23.5x10.5x16 Goodyear race tire @ 30 psi
"0.5" aluminum wheel spacers"	1.25	-	-
Transmission
915 5-speed transmission w/o starter motor and oil	103	-	-
915 5-speed transmission w/Tilton starter and clutch disc but no oil	116	-	-
Half shaft w/CV joint (15-76 LOBRO)	13.5-14	10	Smart Products tubular half shaft w/lightened CV joint
Abbreviations: Front, Rear, Left, Right, FiberGlass, Original Equipment
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