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Discussion Starter · #1 ·
I did not see one started yet so I thought perhaps we can get a thread started that addresses the actual weights of individual parts.

Why?

Because small cars HATE weight. Their small motors do not like lugging around anything more than necessary, and when you manage the weight of your car as you modify it, it will reward you with better acceleration, braking, and fuel economy. Typically, for every 10 lbs of "sprung" weight, you gain a performance advantage of roughly 1 horsepower. In other words if you can stand to lose 50 lbs, you have just improved your acceleration as much as that fancy new cold air intake you just installed.

Another item of note is rotational weight, such as wheels, tires, brake rotors, flywheels, crank pullies etc.. These items are even more power sensitive, with just a 3lb weight loss giving you a 1 hp advantage. This is where lightweight flywheels and tire/wheel packages really come into play. For example, if you change out a stock set of 16" sport alloys and go to a blingy looking set of 18's, figure you probably gained between 5-10 lbs per wheel and you now need 7-14hp just to give the car the same acceleration it had when you were stock.

So first order of business... list out the weights of the parts that may be removable and replaced/deleted with a lighter substitute. I will start with listing out the following 3 removable items I weighed on a postal scale:

Under seat air compressor: 4lbs, 10oz.
Pop hubcaps: 5lbs 4oz (set of 4)
Front OEM Floor mats: 3lbs 1 oz.

Looking forward to seeing what else people have removed and weighed :)
 

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great thread idea, unfortunately I don't have weights on most stuff I have installed.

I will make note in the future. trailer hitch is probably 35lbs.
 

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I did not see one started yet so I thought perhaps we can get a thread started that addresses the actual weights of individual parts.

Why?

Because small cars HATE weight. Their small motors do not like lugging around anything more than necessary, and when you manage the weight of your car as you modify it, it will reward you with better acceleration, braking, and fuel economy. Typically, for every 10 lbs of "sprung" weight, you gain a performance advantage of roughly 1 horsepower. In other words if you can stand to lose 50 lbs, you have just improved your acceleration as much as that fancy new cold air intake you just installed.

Another item of note is rotational weight, such as wheels, tires, brake rotors, flywheels, crank pullies etc.. These items are even more power sensitive, with just a 3lb weight loss giving you a 1 hp advantage. This is where lightweight flywheels and tire/wheel packages really come into play. For example, if you change out a stock set of 16" sport alloys and go to a blingy looking set of 18's, figure you probably gained between 5-10 lbs per wheel and you now need 7-14hp just to give the car the same acceleration it had when you were stock.

So first order of business... list out the weights of the parts that may be removable and replaced/deleted with a lighter substitute. I will start with listing out the following 3 removable items I weighed on a postal scale:

Under seat air compressor: 4lbs, 10oz.
Pop hubcaps: 5lbs 4oz (set of 4)
Front OEM Floor mats: 3lbs 1 oz.

Looking forward to seeing what else people have removed and weighed :)
Stock sport rims are 19.8 lbs.

Thank God for your post. I was wondering when and if someone would bring up the fact that the larger rims and tires weigh more and make the car slower. You can get light weight larger rims but that same model rim in a smaller size will net you lighter weight and more speed. It should handle better and be more nimble.(the suspension is better able to keep the rubber in contact with the pavement)This isn't as much of a problem for people with cars that have big HP. For us small and light car guys it's a problem. Wheel/tire weight is the main reason I'm going for 16's on the Abarth. Sure the big rims look good but from what I know the exta weight is significant. I would love to be proven wrong on this as the white 17's would look great on my Abarth. Please make me eat my words.:D
 

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Discussion Starter · #4 ·
Just weighed the stock OE Pop 15x6 steel wheel and 185/55-15 Firehawk GT tire... 31lbs 10oz. Lighter than I thought. I'm impressed :)

To add the Pop hubcap puts my existing OEM setup at 32lbs, 15oz a corner, or 131lb 12oz for the 4 wheel set.

Gonna be hard to improve on that :(
 

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Discussion Starter · #5 ·
Well, I had the rear muffler removed and I weighed it... 12 lbs, 10 oz.
The replacement pipe I had made weighs 4 lbs 5 oz.

More weights:
Rear headrests - 1 lb, 12 oz ea.
Rear Package Shelf (if you can call it that lol) - 13 oz.
Steel Pop Wheel - 14 lb 7 oz.
Steel Wheel and Pop Hubcap - 15 lbs 12 oz.
Rota Shakotan 15x6 15et - 13 lbs 7 oz.
Firestone Firehawk GT P185/55-15 - 16 lbs 3 oz

Weight removed from my stock Pop so far... sprung: 18 lbs, unsprung: 9 lbs
Just like adding 5hp to the motor :D
 

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Discussion Starter · #6 ·
Rota RB 15x6 15mm offset - 14 lbs 2 oz.
 

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Rear Seat Top Half weights ~18lbs each. So 36lbs for both the top halfs w/ headrests on.
Bottom half of rear seat is ~7lbs
Rear Seatbelt anchor ~ 3.5lbs
 

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Discussion Starter · #8 ·
Obviously the goal with a larger tire and wheel combination would be to ensure the weight of both are equal to or less than stock.
If you have a sport, then the heavier 16" alloy wheels tires might give you some room to work with. I would guess the stock sport model wheel/tire combo is around 38 lbs (OE tire should be an additional 19lbs) so there is a chance of finding a well designed 17" wheel/tire that is under that weight.

The guys with the 15" Pop wheels/tires/hubcaps have a harder time to beat their original weight figure because they are at 32 lbs with caps, and 31 lbs with plain steelies. Finding a 17" or even a 16" rim/tire under 31 lbs is daunting. It puts you into the hi dollar forged wheel category, and even there your options would be severely limited.
 

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If you have a sport, then the heavier 16" alloy wheels tires might give you some room to work with. I would guess the stock sport model wheel/tire combo is around 38 lbs (OE tire should be an additional 19lbs) so there is a chance of finding a well designed 17" wheel/tire that is under that weight.

The guys with the 15" Pop wheels/tires/hubcaps have a harder time to beat their original weight figure because they are at 32 lbs with caps, and 31 lbs with plain steelies. Finding a 17" or even a 16" rim/tire under 31 lbs is daunting. It puts you into the hi dollar forged wheel category, and even there your options would be severely limited.
Ahhh... I see what you are saying. Makes sense to me.

On a completely different note - I just pulled the stock sport muffler - rear section only- and weighed it. Including the clamp and tip total weight is 12.2 pounds!
 

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Discussion Starter · #10 ·
OEM Fiat battery (500 CCA): 36 lb 3 oz.
Group 81 Battery (350 CCA): 16 lb 6 oz.
Dry Cell Race Battery (100 CCA): 13 lb 2 oz.

I used all three and all of them will start the car and operate all accessories no problem. For the street I am choosing to use the Group 81 Battery since it offers a little closer output to stock.
 

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Discussion Starter · #11 ·
Plastic Engine Cover: 2 lb 7 oz.
 

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Discussion Starter · #12 ·
Stock Intake system w/ filter and hoses: 6 lb 10 oz
 

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I gained 4lbs per corner when I went from stock steel Pop wheels/caps/tires to 17" Sparco wheels/tires. I thought about only going up to 16's. The hitch is heavy, thought about having it copied in aluminum. Spare tire,jack and hardware is probably 30lbs.
Strut bar was about 5lbs. Mopar CIA added a couple pounds net.
I did gain overall in acceleration, cosmetics and enjoyment.
 

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Discussion Starter · #14 ·
Front Bumper Support (USA version): 11.3 lbs
Horn and bracket: 0.6 lbs
 

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Discussion Starter · #15 ·
Well.. I can tell you a 1.2 liter Fiat 500 in the UK weighs 1965 lbs, and their 1.4 weighs 2165 lbs. Our USA 500 weighs a lot more from the factory, like 2345 lbs I read somewhere (might be off a little).
 

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Discussion Starter · #16 ·
Rear Seat Back (Pop hardtop) - 17.5 lbs x 2 = 35 lbs
Rear Seat Bottom - 7.4 lbs
Rear seat belts and retractors/brackets - 9.4 lbs
 

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Discussion Starter · #17 ·
Rear Bumper Support (USA version) - 18.0 lbs
 

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Discussion Starter · #18 ·
Rear cargo area carpet (oem Pop coupe) - 4.4 lbs
 

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Well.. I can tell you a 1.2 liter Fiat 500 in the UK weighs 1965 lbs, and their 1.4 weighs 2165 lbs. Our USA 500 weighs a lot more from the factory, like 2345 lbs I read somewhere (might be off a little).
The N/A number seems right
 

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Discussion Starter · #20 ·
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