I started this in a new thread to avoid highjacking a paid vendor thread.
From what I see the upper limit to weight shaving from Giulia 2.0T is around 150lbs without seriously cutting into functionality and getting to that goal involves a lot of money, parts that currently don't exist, and some changes in functionality. Everything is a tradeoff...
(most weights and prices estimated)
CF wheels save 56 pounds at a cost of $12,000 ($214/lb)
Lightweight rotors save 16 pounds at a cost of $1500 ($93/lb-numbers from similar BMW parts)
Titanium lug set saves 2 pounds at a cost of $350 ($175/lb)
OEM CF hood saves 6.4 pounds at a cost of $6000+ ($940/lb; way too much--this would be much less $$ if it were an order able option)
Disable start-stop and install a lighter battery saves 15 pounds at a cost of $200 ($13/lb)
Aluminum battery cables saves 5lbs at a cost of $200 ($40/lb, assumes stock cables are copper and ignores installation labor cost)
Titanium suspension bolts saves 20 lbs at a cost of $2000 ($100/lb, totally made up numbers, some of this is unsprung)
Titanium springs save 20 lbs at a cost of $4000 ($200/lb, totally made up numbers)
Light weight exhaust save 11lbs at a cost of $1600 ($145/lb, 2.5 inch straight through--this is loud)
Light weight speakers save 5lbs at a cost of $400 ($80/lb, assumes Neo-magnet speakers are available in the right size)
Sparco seats save ?? lbs at a cost of $5600, only available in black, no seat heaters and reduced power controls
P-zero Corsa tires save about 20-30 lbs of unsprung rotational mass, but are very expensive because the tires don't last very long and are not usable in a lot of conditions that many people expect to use their car.
Lightweight forged wheels save about 30 pounds but the cost is still around $200/lb. Forged wheels might be more capable of handling road hazards than CF wheels, I do not know.
Lightweight cast wheels save about 30 pounds at a cost of $800-$1200 which looks a lot better than the CF or forged wheels $/lb, but it is not clear to me if that a cast wheel that weighs the same as a forged wheel is really strong enough. After all, wouldn't this put the forged wheel mfgs out of business if the cast wheels are good enough?
I did not include lightweight flywheel or torque converter as I suspect that most folks (including myself) will not like the rougher idle, increased stress on the transmission, or the need to pull the engine to install it.
Shaving weight is certainly expensive and I agree that the best weight to shave is from the wheels. Weight shaved from wheels improves handling and yields a disproportionate improvement in acceleration. However, for Giulia 2.0T shaving 250 lbs is equivalent to adding about 20HP to the engine while also improving stop-and-go fuel efficiency. It is only possible to improve engine performance so much before major drive line changes are needed and/or the vehicle is no longer street legal (won't smog).
From what I see the upper limit to weight shaving from Giulia 2.0T is around 150lbs without seriously cutting into functionality and getting to that goal involves a lot of money, parts that currently don't exist, and some changes in functionality. Everything is a tradeoff...
(most weights and prices estimated)
CF wheels save 56 pounds at a cost of $12,000 ($214/lb)
Lightweight rotors save 16 pounds at a cost of $1500 ($93/lb-numbers from similar BMW parts)
Titanium lug set saves 2 pounds at a cost of $350 ($175/lb)
OEM CF hood saves 6.4 pounds at a cost of $6000+ ($940/lb; way too much--this would be much less $$ if it were an order able option)
Disable start-stop and install a lighter battery saves 15 pounds at a cost of $200 ($13/lb)
Aluminum battery cables saves 5lbs at a cost of $200 ($40/lb, assumes stock cables are copper and ignores installation labor cost)
Titanium suspension bolts saves 20 lbs at a cost of $2000 ($100/lb, totally made up numbers, some of this is unsprung)
Titanium springs save 20 lbs at a cost of $4000 ($200/lb, totally made up numbers)
Light weight exhaust save 11lbs at a cost of $1600 ($145/lb, 2.5 inch straight through--this is loud)
Light weight speakers save 5lbs at a cost of $400 ($80/lb, assumes Neo-magnet speakers are available in the right size)
Sparco seats save ?? lbs at a cost of $5600, only available in black, no seat heaters and reduced power controls
P-zero Corsa tires save about 20-30 lbs of unsprung rotational mass, but are very expensive because the tires don't last very long and are not usable in a lot of conditions that many people expect to use their car.
Lightweight forged wheels save about 30 pounds but the cost is still around $200/lb. Forged wheels might be more capable of handling road hazards than CF wheels, I do not know.
Lightweight cast wheels save about 30 pounds at a cost of $800-$1200 which looks a lot better than the CF or forged wheels $/lb, but it is not clear to me if that a cast wheel that weighs the same as a forged wheel is really strong enough. After all, wouldn't this put the forged wheel mfgs out of business if the cast wheels are good enough?
I did not include lightweight flywheel or torque converter as I suspect that most folks (including myself) will not like the rougher idle, increased stress on the transmission, or the need to pull the engine to install it.