991 Turbo on a diet.

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Old Dec 20, 2016 | 03:45 PM
  #16  
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Originally Posted by Bobbyfali
KLW forged wheels losing about 25-30lbs of rotating mass and seats saving another 60lbs = avg.150lbs (the wheels rotating mass is worth a lot more then indicated 25-30lbs savings)
Unsprung weight loss is like losing 4x that amount in sprung weight. The factor that's hard to measure is the durability of the wheels (comparatively). Light is great as long as it can handle punishment. I hit a small hole in my M3 (DD) with forged wheels and it bent both f+r in the same track. Forged doesn't mean indestructible. For me personally I don't buy wheels anymore. Hard to really feel the difference (unless a motorcycle) and I find Porsche OEM wheels quite nice and easy to clean!
 
Old Dec 21, 2016 | 05:27 PM
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Originally Posted by cm09578
I did a search but really couldn't find much. What have people done to save / shave off weight on their 991 Turbos? Any aftermarket lighter battery etc.?
The most successful technique has been to trade it in for a GT3 RS
 
Old Dec 21, 2016 | 05:30 PM
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Originally Posted by Bobbyfali
Keep in mind that weight is not just for acceleration (which it does help), but positively effects almost every other performance metric of your vehicle. Breaking, handling, sportier feel, wear & tear on parts, more fuel efficient (I know, but technically it should lol!!)...etc..

It makes the car just more agile in every "feel" and recordable metric. I had my 996T down to 3360lbs and the car just felt more like a sports car and just more enjoyable to drive period!

Battery is the best way and best bang for the buck ways of reducing weight. I had a 18lbs Braille battery that saved 37lbs for $200 without issue!

https://www.braillebattery.com/index...atteries/b2618

With E85 and more DD I would do the 21 lbs version in my 997:

https://www.braillebattery.com/index...atteries/b3121

This was 4yrs ago so with battery technology continually moving forward there is most likely even better options out there.

It seams that the newer the 911 the harder it is to lose weight. In the 996 I just got rid of my spare and tools and saved 40lbs. Not an option of the newer 911's as we don't have a spare. Go RWD in 996 can't do that in the newer 911's. Get rid of that iron hood that weights 40lbs in the 996 to a 13lbs carbon is a 27lbs savings, can't really lose that much going from our already light weight aluminum to carbon with the newer 911's. On the manuals 996-997 you can do a LWFW/clutch set up (stock to ERP triple)and drop 24lbs etc..

You lose a good bit from a light weight battery (30lbs), light weight after market exhaust (about 30lbs),LW forged wheels losing about 25-30lbs of rotating mass and seats saving another 60lbs = avg.150lbs (the wheels rotating mass is worth a lot more then indicated 25-30lbs savings)

The above set up is something you would feel all around for sure and measure. It would feel like a more lively & enjoyable car.
I feel like reducing weight in the nose is just going to cause more understeer.
 
Old Dec 21, 2016 | 07:43 PM
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Originally Posted by stealth.pilot
The most successful technique has been to trade it in for a GT3 RS
Good answer
 
Old Dec 22, 2016 | 02:26 PM
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bbs RI-D magnesium or maybe carbon fiber wheels.
light weight cup tires
titanium bolts
pccb or something drilled and slotted.
oem 991 bucket seat
remove spare tool and things that you dont need
titanium or inconel exhaust and headers
also not having a panoramic roof helps a lot in weight
aftermarket coilcovers .
Lithium battery
as stated , having a car without roof , with pccb , burmester and bucket seets helps a lot from the factory.

these is what you can do without ruining the car but also will cost a lot and if you are rreally looking into light weight than go for a mclaren
 
Old Feb 3, 2017 | 02:14 PM
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Best bet is a nice set of quality lightweight wheels like Champion Motorsport, you can feel the difference in the handling. The other stuff ...you're pissing in the wind on a street car IMO. Don't forget the driver, I've seen more than one sports car with carbon fiber this and that , then a 300 pounder crawls out of the cockpit
 

Last edited by TT Gasman; Feb 3, 2017 at 02:16 PM.
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