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03 C5Z Weight reduction - 106 lbs

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Old Jul 4, 2020 | 05:56 PM
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Default 03 C5Z Weight reduction - 108 lbs

I'm using my 03 C5Z mainly for track days, so I keep adding lightness to it. I decided to weigh the pile of parts removed from the car. It summed up to an amazing 49 kg / 108 lbs! The final weight reduction is probably closer to 41 kg / 90 lbs, e.g. an electric power steering pump is used instead of the stock unit.

  • Stock head unit, CD changer and speakers
  • Secondary air injection
  • Power steering pump
  • Valve covers
  • Air filter cover (zip-tie mod)
  • Rear trunk plastic covers
  • Rear trunk lamps
  • Tyre puncture kit
Parts above 20 kg / 48 lbs
  • Rear trunk carpet 6 kg / 13.2 lbs
  • Rear trunk lid 2 kg / 4.4 lbs
  • Floor mats 2 kg / 4.4 lbs
  • Hood liner 1 kg / 2.2 lbs
  • Passenger seat 14 kg / 31 lbs
  • Driver seat 16 kg - Sparco Evo 12 kg = 4 kg
Total weight saving 49 kg / 108 lbs 😁

More details on my Z06 "blog" : Link

Last edited by hmhaga; Jul 5, 2020 at 03:34 AM.
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Old Jul 4, 2020 | 06:26 PM
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Excellent information, thanks for sharing!
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Old Jul 5, 2020 | 10:09 AM
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Keep going!!!




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Old Jul 27, 2020 | 07:58 PM
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Put the car on a weighing cell today, 1380 kg / 3042 lbs 😁
Half tank of fuel.
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Old Jul 27, 2020 | 10:45 PM
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Lots of C5z guys have reported around that weight or less without removing anything and have 1/4 to 1/2 tank of gas.

I have heard that GM reports curb weights with a full tank of gas. Ford and other American manufacturers report it with just some gas.

Did you weigh it before pulling your stuff? And how did you weigh your items? Kitchen/postal scale of holding stuff in your hand on a bathroom scale?
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Old Jul 28, 2020 | 06:02 AM
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Originally Posted by Krusty84
Did you weigh it before pulling your stuff? And how did you weigh your items? Kitchen/postal scale of holding stuff in your hand on a bathroom scale?
I didn't weight the car before I started to pull stuff out, unfortunately. I did however weigh all the parts removed using a fishing scale, 108 lbs in total (see above). The weighing cell pictured is calibrated annually, as it is used by the road authorities to verify compliance to regulations (e.g. total weight with a trailer).


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Old Jul 28, 2020 | 11:36 AM
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What are you using to cover the rocker arms?
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Old Jul 28, 2020 | 03:02 PM
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Originally Posted by FOGeologist
What are you using to cover the rocker arms?
Haha... I believe he meant that he removed the coil/fuel-rail covers. You can see them in the picture.
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