I'll look for that one.
C4 Weights and Info
Le Mans Master
Joined: Aug 2004
Posts: 5,141
Likes: 7
From: Metairie Louisiana
Race Director
Joined: Jun 2004
Posts: 13,969
Likes: 710
From: WI
I tried to look up the weight of those Firestone Firehawk SZ50 runflat tires but they don't seem to be made in those sizes.
http://www.bridgestonetire.com/tires...Product_ID=217
P245/45ZR17 89Y Y BW 080489 7.5-9.0 8.0 25.7 9.6 7.4 11.9 10.0 811 504 29 340 AA A
P275/40ZR18 94Y Y BW 080470 9.0-11.0 9.5 26.7 10.9 8.6 12.3 10.0 783 487 34 340 AA A
I think they are factory C5 tires.
http://www.bridgestonetire.com/tires...Product_ID=217
P245/45ZR17 89Y Y BW 080489 7.5-9.0 8.0 25.7 9.6 7.4 11.9 10.0 811 504 29 340 AA A
P275/40ZR18 94Y Y BW 080470 9.0-11.0 9.5 26.7 10.9 8.6 12.3 10.0 783 487 34 340 AA A
I think they are factory C5 tires.
Race Director
Joined: Jun 2004
Posts: 13,969
Likes: 710
From: WI
Interesting to have the tire weight, subtract it and see how accurate other wheel weight posts are.
Burning Brakes
Joined: Nov 2004
Posts: 1,057
Likes: 0
From: Warren Ohio
If I recall correctly, they discontinued the SZ50's that I have about 2 years ago. The sizes that I gave are correct...but they are not run-flats. The rears are labelled SZ50 EP's, but that's the only change from what I stated before.
Rear knuckle assy with hub - 23.46 lbs.
Toe rod assy - 6.64 lbs.
"C" beam for M6 - 7.86 lbs.
LT1 A/C condenser - 8/44 lbs.
Base '95 Vert rear spring, code "NYR" - 7.30 lbs.
Short "dogbone" - 1.28 lbs.
Long "dogbone" - 1.36 lbs.
Weight saved by using Z28 direct thottle cable - 5.80 lbs.
Rear knuckle assy with hub - 23.46 lbs.
Toe rod assy - 6.64 lbs.
"C" beam for M6 - 7.86 lbs.
LT1 A/C condenser - 8/44 lbs.
Base '95 Vert rear spring, code "NYR" - 7.30 lbs.
Short "dogbone" - 1.28 lbs.
Long "dogbone" - 1.36 lbs.
Weight saved by using Z28 direct thottle cable - 5.80 lbs.
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Burning Brakes
Joined: Nov 2004
Posts: 1,057
Likes: 0
From: Warren Ohio
30mm Z07 Front swaybar - 14.10 lbs.
24mm Base Rear swaybar - 13.50 lbs. (still looking for 26mm bar, if anyone has one)
stock rear rotor J55 brakes (think these are the same as non-J55) - 12.22 lbs with some wear.
BDI Slotted & zinc-coated rear rotors - 12.88 lbs.
BDI Slotted & zinc-coated J55 13" front rotors - 19.36 lbs.
24mm Base Rear swaybar - 13.50 lbs. (still looking for 26mm bar, if anyone has one)
stock rear rotor J55 brakes (think these are the same as non-J55) - 12.22 lbs with some wear.
BDI Slotted & zinc-coated rear rotors - 12.88 lbs.
BDI Slotted & zinc-coated J55 13" front rotors - 19.36 lbs.
Race Director
Joined: Jun 2004
Posts: 13,969
Likes: 710
From: WI
'89 should be close to this page I saved on my '88.
Attachment 48161616
Mine was 3150 IIRC with A/C but the spare tire and radio/speakers removed. Quarter tank and no driver. I'll reweight it soon now that A/C is gone.
Attachment 48161616
Mine was 3150 IIRC with A/C but the spare tire and radio/speakers removed. Quarter tank and no driver. I'll reweight it soon now that A/C is gone.
Last edited by Aardwolf; Oct 17, 2025 at 05:34 PM.
Safety Car
Joined: Oct 2008
Posts: 4,689
Likes: 4
From: Yucaipa CA
re '88 A/C system (all parts) - 50 lbs, that is all the parts put in a box, even the bolts. A/C compressor, condenser, evaporator, lines, accumulator, bracket, et al.
Also of note the C5 thin spokes are shown at 20 lbs IIRC in the C5 thread but I weighted them several times and keep getting 18 on my bathroom scale. I included the part number in the other weight thread in case weights were compared for a different/same part number. IIRC there were several makers for the wheels and there may be different part numbers with different weights.
18 lbs silver c5 rear thin spoke 18x9.5" #9593799
Also of note the C5 thin spokes are shown at 20 lbs IIRC in the C5 thread but I weighted them several times and keep getting 18 on my bathroom scale. I included the part number in the other weight thread in case weights were compared for a different/same part number. IIRC there were several makers for the wheels and there may be different part numbers with different weights.
18 lbs silver c5 rear thin spoke 18x9.5" #9593799
Race Director
Joined: Jun 2004
Posts: 13,969
Likes: 710
From: WI
Race Director
Joined: Jun 2004
Posts: 13,969
Likes: 710
From: WI
I weighed a few more things from my '88 coupe, here's my updated list:
Stock glass head lights 2 lbs each
stock plastic .5? lbs each
stock light assembly 10 lbs each w/plastic lens
upper wheel well covers 2 lbs each
dash screws, big can full from gutting the dash 4 lbs
door panel stock 1988 6 lbs each
Hatch carpet including part that goes behind seats 25 lbs
radio, boxes, antenna, speakers, 25 lbs
dash pad 7 lbs
Stock 1988 electric leather seat 40 lbs each w/bracket
Corbeau A4 seat 25 lbs
Corbeau bracket 8 lbs
die hard silver battery 32 lbs
braille 11.5 lbs
tpis header 10 lbs
stock exhaust manifold 6.5 lbs
stock '88 rim 17x9.5 25 lbs
c5 rear thin spoke part#9593799 18 lbs
stock water pump 6 lbs
Wieand water pump 6 lbs
my harness bar 4 lbs
g-force harness 5 point 6 lbs
c5 rotor 16 lbs
c4 rotor 12 lbs
sr lid 6
sr plenum 6
sr runner each 2
stock plenum 5
stock runner 1 lbs each
stock front 88 sway bar 26mm tubular 4.5
new Addco/VBP 1.25" tubular front sway 10
new Addco/VBP 1" rear tubular 8
stock 24 s
sway bar hardware 4
stock muffler
Hooker aero chamber 14
dampener fluidampr 6 lbs
dampner stock 8.3 lbs
canton 240T oil pan 13 lbs
A/C parts 50 lbs
compressor, condenser, evaporator plus shroud, lines, accumulator, and bracket, bolts, no charge
Melrose roof skin (heavy version, light = 6 lbs) 9 lbs
carbon fiber top and frame weight 12 lbs
carbon fiber skin 2 lbs
stock clear plastic lens 11 lbs
stock top frame 10 lbs
wave shaped metal frame behind dash 8 lbs
'88 starter 10 lbs
'88 700r4 flex plate 5 lbs
Stock glass head lights 2 lbs each
stock plastic .5? lbs each
stock light assembly 10 lbs each w/plastic lens
upper wheel well covers 2 lbs each
dash screws, big can full from gutting the dash 4 lbs
door panel stock 1988 6 lbs each
Hatch carpet including part that goes behind seats 25 lbs
radio, boxes, antenna, speakers, 25 lbs
dash pad 7 lbs
Stock 1988 electric leather seat 40 lbs each w/bracket
Corbeau A4 seat 25 lbs
Corbeau bracket 8 lbs
die hard silver battery 32 lbs
braille 11.5 lbs
tpis header 10 lbs
stock exhaust manifold 6.5 lbs
stock '88 rim 17x9.5 25 lbs
c5 rear thin spoke part#9593799 18 lbs
stock water pump 6 lbs
Wieand water pump 6 lbs
my harness bar 4 lbs
g-force harness 5 point 6 lbs
c5 rotor 16 lbs
c4 rotor 12 lbs
sr lid 6
sr plenum 6
sr runner each 2
stock plenum 5
stock runner 1 lbs each
stock front 88 sway bar 26mm tubular 4.5
new Addco/VBP 1.25" tubular front sway 10
new Addco/VBP 1" rear tubular 8
stock 24 s
sway bar hardware 4
stock muffler
Hooker aero chamber 14
dampener fluidampr 6 lbs
dampner stock 8.3 lbs
canton 240T oil pan 13 lbs
A/C parts 50 lbs
compressor, condenser, evaporator plus shroud, lines, accumulator, and bracket, bolts, no charge
Melrose roof skin (heavy version, light = 6 lbs) 9 lbs
carbon fiber top and frame weight 12 lbs
carbon fiber skin 2 lbs
stock clear plastic lens 11 lbs
stock top frame 10 lbs
wave shaped metal frame behind dash 8 lbs
'88 starter 10 lbs
'88 700r4 flex plate 5 lbs