Weight Loss Potential Thread
 

I was bored this evening so I put together a weight loss potential list. Some weight losses are exact and some are estimated (erred on the conservative side).

I used this thread for most of the stock weights for comparison. Other weights are from threads on this forum.

I left out most of the miscellaneous <.5lb items.

All weights are total (i.e. wheel weight reduction is all 4 corners, not per-side), and estimated weights have a "~".

This list puts us near a 200lb reduction, while still remaining 100% daily driveable. I understand there are some more serious mods for reducing weight, such as stripping the interior or gutting the AC, but for now I'm trying to keep most of the comforts of owning a brand new car.

Post up and I'll add to the list when I can! I know there is more un-needed weight that can be lost!

Sources:
http://www.ft86club.com/forums/showthread.php?t=7881
http://www.ft86club.com/forums/showp...0&postcount=11
http://www.ft86club.com/forums/showp...62&postcount=1
http://www.ft86club.com/forums/showp...63&postcount=7
http://www.ft86club.com/forums/showp...99&postcount=4
http://www.ft86club.com/forums/showp...84&postcount=1
http://www.ft86club.com/forums/showp...97&postcount=2
http://www.ft86club.com/forums/showp...67&postcount=3
http://www.ft86club.com/forums/showp...4&postcount=31
http://www.enkei.com/size_chart/RPF1.pdf
http://fecompetition.wordpress.com/
http://www.essexpartsblog.com/news/b...-shaves-10-lbs
http://www.ft86club.com/forums/showthread.php?t=18364

Windscreen washer fluid. approx 7 pounds.
http://fecompetition.wordpress.com/

Nice post, thanks.:thumbsup:
You were definitely a bit conservative on your battery weight loss potential. We were able to knock 25 lbs. off with current lithium-ion technology, while still maintaining 100% daily utility. :D Finding that extra 10lbs. elsewhere without impacting usability will probably not be super easy.

Your calc is off on the wheels... 41-38 is 3, not 12.

3x4=12

do the seats have airbags in them?

if yes, does removing them affect the functionality of the airbag system?

What are the lowest pulse cranking amps and amps/hour reserve to keep this a daily driver?

Didn't think about that one. That's something that I've removed or hasn't worked on my past cars. Not a problem for DD unless your driving on roads with lots of sand/grit (i.e. snowy roads that have melted!). Thanks!

I have seen that battery and it is AMAZING! However, it's very much on the pricey side, which is why I went conservative with the number. Prices should eventually come down, though, like they do for just about all new-tech items :)

Braille has a few lightweight batteries for much less. I'm just not sure if they're any good. Anyone have any experience with them?

http://www.braillebattery.com/index....batteries/b106

that would depend entirely on the climate of where you live.

Between Hot and Stupid Hot.

you can probably get away with just using a lemon and some copper wire

I think I'll try that Braille B106 out. At 6.9lbs and $148 it's worth a shot.

Taking a dump before getting in the car 5 to 8 lbs.

i have never shat out 8 pounds, holy fuck mang.

Pics or it didn't happen.

LOLing hard right now.

love it..... 2.8 pounds - Owners manual!

Great job.

We did a similar post on our Evo X a while back.

Engine covers and intake box and little things adds up too.

for all of you who are currently at the office

8 pounds is equivalent to a stack of 750 standard/letter sized pages, that's a huge shit.

Please note that CCA is important to anyone that will be driving this car through cold weather. Smaller batteries are great for weight savings.

:lol:

Beer belly - 30 lbs

lmao! I think I need to go to the bathroom.

I figured that would stir up something, but seriously has anyone thought about taking out the A/C unit? Its already a pretty crappy unit. I feel like its the same crappy one that comes in my Aston. It only moves air doesn't actually cool it down.

i did that on my Subaru, saved 22 pounds

but with the recent heatwave i'm glad my new car has AC

No McDonalds ~20lbs

Apparently aftermarket headers are worth 8 pounds, which could be nice since it's at the front of the car.

Source: http://www.ft86club.com/forums/showthread.php?t=13011

Looks like a net savings of 200lbs might be feasible, although some of the parts in the OP's post wouldn't come cheap (the AP racing BBK and CF seats).

The lightest readily available (at Tire Rack) wheel/tire combination I was able to come up with was the 17x7 Kosei K4R wheel with 215/45-17 General Exclaim UHP (ultra high performance summer) tires, and having them shaved down to 6 or 7/32 (an extra $100 at TR) would save ten pounds per corner, going from 41 lbs stock to 31 lbs stock for a total weight loss of 40 lbs of rotating mass. Or you could step up to a better tire like the Continental DW and give up 2 lbs, but still save 32 lbs total.

Weight loss follows the $ per pound rule, especially if you want to keep the car's utility. As you take more and more weight off, it becomes more expensive per lb. I learned a lot about this topic going from a C5 Z06 to an NA Miata. Some of the Miata guys are nutters over pulling ounces out of the car...it's fun to watch people get creative!

Why not just use the original thread with the same data?

http://i172.photobucket.com/albums/w...ously-meme.jpg

The 10 lb flywheel may be too aggressive. I have a prototype light flywheel right now in approx 12 lb range, and the first gear takeoff is something to get used to.

Also the clutch is a massive weight system that can be reduce. It's heavy because it's needed in our design to damp out the excess vibration out stock flywheel cannot absorb.

AHAHAHAHAHAHAAHAHAHAHAH

DA FUCK?

AHAHAHAHAHAAHAHAH :bellyroll:

Wtf haha,

Updated. Thanks!

Has anyone here looked into removing/replacing the stock front and rear steel bumpers? I'm sure there are some serious saving to be had there...

But the weight is low. If we're just talking about weight and $, lightweight battery is better since the weight is on the front and high (although headers can increase engine power)

Won't it decrease car rigidity? Isn't that sort of a similar idea as drilling countless small holes through the chassis to decrease weight?

If I understand, they are there for collision reasons, but they might also increase rigidity a bit, too. I have seen one company that makes lightweight replacement pieces, but there are no weight specs.

And I wouldn't think that this is as hardcore as drilling holes in the chassis. Everything listed in this thread is reversible back to stock.

Great list, thanks for all the info and ideas!!!!

If we had major suspension components remodelled in lighter alloys then there would be some nice weight saving options. Cost wouldn't be cheap of course