Springs, shocks and wheels 101

[Joe 1320]

Here are some specs for those wishing to swap springs, shocks, or wheels. Obviously there is more data to be collected, but at least this is a start. The wheel weights are rounded up to the next whole number, ditto for a few weight reduction items listed at the bottom. Hope this helps............

F-body Spring Rate Database
(Progressive springs are listed with initial and final spring rate)

Manufacturer Model Front (lbs/in) Rear (lbs/in) Ride Height Drop (in.)
OEM GM V6 93-97 223 95.4 0.00"
OEM GM V8 93-97 310 110 0.00"
OEM GM V6 98-02 257 114 0.00"
OEM GM V8 98-02 292 114 0.00"
1LE GM 1LE 360 130-180 0.00"
Eibach V6 Prokit 93-97 337 75-135 1.00"
Eibach V8 Prokit 93-97 377-600 94-160 1.30"
Eibach V6 Prokit 98-02 351 80-137 1.40"
Eibach V8 Prokit 98-02 400 80-137 1.25"
Eibach Sportline 360 80-137 1.6" / 1.4"
Hotchkis Fbody Springs 285-525 100-140 1.00"
G2 Super Springs 548 180-230 1.50"
Hyperco Hypercoils 360-580 168-216 1.25"
MAC Fbody Springs 450-515 215-245 1.50"
SLP Level 1 Progressive 223-448 97-136 0.75"
SLP Level 2 Progressive 300-450 115-185 0.50"
BMR Fbody Springs 310-550 145-170 1.00"
Suspension Techniques 428 161 1.30" / 1.70"
Edelbrock Fbody Springs 585 120-150 1.25"
DMS Springs LS1 98-02 325-630 95-160 1.30"

(Know the specs to another spring not listed? post it and I'll add it. )



Shock Rate Database

Manufacturer Model/Location Bump Rebound
Bilstein HD Front 159 279
Bilstein HD Rear 86 174
SLP/Bilstein Front 130 397


Fbody Wheel Weights

Wheel Weight (lbs.)
WS6/ZR1 (chrome) 20.5
10 Spoke SS (painted) 22.0
10 Spoke SS (chrome) 23.0
Firehawk (painted) 22.0
Firehawk (chrome) 23.0
2000+ Z28/Camaro 16" (painted) 17.0
1998 Z28/Camaro 16" (chrome) 21.5
5 Spoke Firebird/Z28 16" (painted) 19.5
1997 to 1999 C5 Front 20.5
1997 to 1999 C5 Rear 23.0
Centerline Rebel 17x8 (Orbital 2000 Series) 26.0
Centerline Telstar 15x4 12.0
Mille Miglia 17x9 25.5
AFS ZR1 17x11 replica (painted) 24.0
Fikse FM5 17x9.5 Wheel 18.0
2000+ Corvette Front 18.1
2000+ Corvette Rear 20.1
Weld Prostar 15x8 13.0
Weld Prostar 15x3.5 10.0
Bogart Dragstar 15x10 10.0
Bogart Fluted Star 15x3.5 8.5
American Eagle 077 16x8 (all finishes) 26.0
American Eagle 077 17x8 (all finishes) 28.0
American Eagle 077 18x8 (all finishes) 30.0
American Eagle 185 17x8 (all finishes) 22.0
ROH Snyper 17x9 26.0
American Racing Torq Thrust II 17x9.5 24.0
American Racing Torq Thrust II 17x11 27.0
Konig Monsoon 17x9.5 21.0

(Know the another Fbody wheel weight thats not listed? Email me!)


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Weight List

Interior stuff:

Jack: 10
Spare tire: 28
Front seats: 47 each
Driver and front passenger seatbelt assemblies: 4 each
Rear seats (bottom pads): 5 each
Rear seatback and seatbelts: 30
Stereo receiver: 5
Rear panels w/ speakers: 4 each
Steering wheel (w/ air bag): 10
Passenger air bag: 19
Stock shifter assembly: 5

Chassis & Suspension:

Front bumper support: 23
Rear bumper support: 21
Torque arm: 11
LCAs: 5 each
Panhard rod: 5
Front swaybar w/ endlinks: 13
Rear swaybar w/ endlinks: 8
Power steering rack: 18
ABS, complete system 18
complete A/C system including evaporator and fan motor w/ housing 57.3
airbag and bracket, passenger's side: 4
Airbag, driver's : 4
Air dam: 2
Antenna, bracket, and mast : 2
Ashtray & lighter: .75
Bolt lengths, shortned: 3
Brake pedals fabricated aluminum: 6
Lightweight carpet & sound deadening material: 54
Catback and intermediate removal: 48
Cats :10
Crossmember brace: 4
Cruise control: 5
EGR, air pump, & harware: 11
Firewall insulation: 7
Floormats: 5
Front end, pro 1 piece (vfnfiberglass.com): 17
Hatch cover: 2
Hatch struts: 2
Headlights, assemblies, support(custom headlights): 22
Head unit (stereo) 4.5
Heat sheilding: 8
Heater core: 9
Hood latch mechanism: 4
Hood struts: 2
Hood hinges:8
Hood, lift off: 12
Inner fenderwells, plastic, front: 3
Owner's manual: 1
Panhard rod brace, fabricated aluminum: 5
Parking brake system with handle: 12
Power steering pump, pulley, idler pulley: 11
Rear view mirror: 1
Seatbelts & retractors (front and rear): 16
Seat ,drivers (switched from stock leather to Corbeu Forza, this is difference in weight) :32
Seat, passenger's leather: 34
Seats, rear leather: 19
Sheetmetal, extra double walled:3
Side impact bars (7.5 each): 15
Spare tire and jack: 35
Speakers and insulation: 14
Spring isolators: 6
Sun visors: 2
Swaybar and brackets, front: 14
Washer fluid pump: 1
Windshield washer fluid (full): 9
Windshield wiper reservoir: 2
Wiring, excess: 24
Air intake plumbing, custom fabrication: 3
Carbon fiber driveshaft: 9
Chromoly A-arms: 14
Chromoly PA K-member: 60
Drag slicks and alumastars: 84
Dry cell battery: 18
Electric water pump:8
Fiberglass hood:30
Fuel tank ,composite plastic: 21
Headers: 11
Lightweight brakes, front: 35
Lightweight flexplate: 3
Lightweight springs and shocks: 13
Manual rack and pinion steering: 10
Rotating assembly: 12
TQ converter, small: 20
Turbo 400 full manual reverse pattern valvebody: 30
Underdrive pulley, aluminum: 5

[Joe 1320]

Feel free to post any additional weight loss data..... this could be the official weight watcher's thread.

[Christopherrr]

diddly! Always wondered what my spring rates and shock rebounds were. Thanks Joe

[TraceZ]

error?

Eibach V8 Prokit 93-97 377-600 94-160 1.30"


600? that can't be right, can it?

[Joe 1320]

Eibach V8 Prokit 93-97 377-600 94-160 1.30"


600? that can't be right, can it?

I suppose it's possible. Many manufacturers have products that are similar. I can tell you that I've ridden in a few that rode like they must have used a brick as a spring, so I'm not going to doubt it.

[Jeff_in_Atl]

This is such a good thread that I made a shortcut on my desktop. I'm still trying to decide on springs and shocks. I'm pretty sure I will get the BMR springs. I just can't decide on whether to get Hal or Koni shocks. There used to be a company that made a cockpit adjustable shock with a 3 position switch for the Mustang but I can't find them for the F-body. That would be nice.

[casey02ws6]

For what its worth I have heard that the BMRs are much stiffer than advertised. I have a local guy here who is into road racing and he recommended the Koni SAs - they can actually be used to lower the car without aftermarket springs. You can use the lower perch mount on the front and remove the isolator on the back to get ~ 1" drop. He recommended the Hotchkis springs if you go that route.