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Weight Reduction - Putting the rx7 on a diet...What have you done?

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Old Feb 14, 2026 | 10:15 AM
  #51  
Howard Coleman CPR's Avatar
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weight is certainly one of the factors that places the FD on the top step of the podium.

i was told that during the design Mazda tasked two separate groups to remove weight. they were prohibited from talking w each other. a close look at the chassis from this aspect shows they took their task seriously.

WHERE the weight is located is as important as losing the weight. front weight is evil. rear weight is Godly. while there are numerous reasons for no PS, no AC, no ABS, no PBs cluttering my engine compartment, front weight loss is my primary motivating factor.

Last edited by Howard Coleman CPR; Feb 14, 2026 at 02:18 PM.
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Old Feb 15, 2026 | 03:08 PM
  #52  
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Originally Posted by Valkyrie
My friend thinks there's no way it was that light.
I think he's right, under 1100kg would tend to indicate extensive lightening.

Some sort of AI fish bot resurrecting a decade old thread(fin)?
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Old Feb 15, 2026 | 05:06 PM
  #53  
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From: Japanabama
Originally Posted by billyboy
I think he's right, under 1100kg would tend to indicate extensive lightening.

Some sort of AI fish bot resurrecting a decade old thread(fin)?
It wasn’t me!

It was probably at least 100 kg lighter than stock at the time, so maybe I am misremembering 1180 kg.
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Old Feb 16, 2026 | 12:53 PM
  #54  
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Originally Posted by billyboy
Some sort of AI fish bot resurrecting a decade old thread(fin)?
Yep. At least the AI / spammer chose an interesting thread.
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Old Feb 16, 2026 | 05:44 PM
  #55  
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ATX20-HD Heavy Duty Lithium Battery by Antigravity, front view
5 pound lithium battery vs 35 pound lead acid battery.
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Old Mar 5, 2026 | 12:25 PM
  #56  
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Originally Posted by zman600
Every car can benefit from weight redution even a car as light as the rx7.
so...
i wanted to bring up one of my favorite topics from the 350z forums and since we dont have an Official one on rx7club.com i started my own. (im new here but was on there for a few years).

O! Guy lets please leave out the "use the search function" comments because those get really old. These sites are for discussions so.... lets have one.

I want to know what everyone been doing to lighten there ride and also it is very useful when people post up pictures(and captions) of stock and aftermarket items and their weights so others can compare parts.

If you get a chance to have your car weighed or corner balanced post it here with a list of modifications done.



I feel you — trying to shave weight off an RX‑7 is always a mix of art and patience. Removing sound deadening, swapping to lighter wheels, simplifying the interior, and even trimming unneeded brackets really adds up over time. It’s like tuning a body for performance, step by step. Funny enough, I was reading about a different kind of “diet” recently — the 16:8 fasting approach at https://wellness-app.com/16-8-fasting-1-week/ how much weight can you lose with 16:8 fasting— and the concept of trimming what’s unnecessary to improve efficiency kind of resonated with this thread. Different topic, but similar mindset helps in both car builds and health goals.
thanks for the information!

Last edited by heidiwhite; Mar 6, 2026 at 05:00 AM.
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Old Mar 5, 2026 | 03:41 PM
  #57  
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If I'd have to guess I'd say my car can't weigh much more than 1600#s, but its not exactly an FD anymore so...
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Old Mar 5, 2026 | 09:07 PM
  #58  
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Good choice

Originally Posted by CREEPENJEEPEN
ATX20-HD Heavy Duty Lithium Battery by Antigravity, front view
5 pound lithium battery vs 35 pound lead acid battery.
I use this in the rx8. In my FD I use the ATXHD 30 with 979 cranking amps 7.5 lbs
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