E55 weight reduction tricks....post here
My E55 diet thus far........
I just put 16.8 lb rear 18x9 Kosei rims on my E55 and the total weight went from 54lbs (19 inch Iforge daytonas + 275s PS2s) to 43 lbs (Mickey Tompsons 18 inch 265s w/ Kosei rims)....this is down from about 56 with the stockers...
So I lost 13 x 4 wheels = 52lbs
Evo Rotors (all 4) = 35 lbs
Underhood plastic parts/stripping removed = 5 lbs
Rear Truck cover + tools & emergency kit = 20 lbs
14 lb battery vs. 55 stock = 41 lbs
Floor mats = 5 lbs
======================
- 158 lbs (with unsprung reduction of 87 lbs). Using an angular physics calculation thats like 147 lbs of sprung weight (1.7x multiplier)...adding them up its like - 213 lbs. Which should be 2 tenths off the 1/4. We shall see.
Does anyone else have any weight reduction techniques other than Aitkens or south beach for the driver? My '03 didn't come with a spare.
The last stuff I can think of would be a voltphreaks 4lbs battery and CF hood but its $$$ costly.
Last edited by e55 baller; Nov 17, 2008 at 10:05 AM.
Lot of weight in the exhaust. I would look hard there. Keep water low or empty in the washer fluid bottle.
Lose body weight! PS, what battery you running?

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Reduce unsprung weight make more of a difference, which you have already done. Weight reductions from the exhaust modifications would be just more a bonus on top of the performance gain.
I kept the stock battery. More weight to the rear, more traction.
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BTW I added up all the crap I have in the car on a daily basis, about 35 lbs. Don't forget side pockets all around, map pockets, seatbacks, glove box, center and middle console (F&R)...sheesh all that stuff adds up.
Lighter wheels
Less fuel
No gear in trunk
Maybe battery, with out effecting any of the electronics
is enough i feel, anything else and your just been unreasonable to what type of car you own.
if you want to run fast times, just ship your car to a fast track with good weather and good prep and there’s your fast times, with out doing all the other stuff or even heavy modding

it I think its cool to see what some people have come up with and see if its ok with u or fits your needs, so continue the talks
Remove winshield washer fluid resevoir and pump.
Remove sound dedoning material in the trunk, you can even remove the finishing panels back there, I removed mine but opted to reinstal the pretty stuff but leave deadoning padding out.
Battery: I bought a 15 pound carbon fiber battery from Braille Auto (saved 30lbs)
Seats: There are lighter seats out there if you want to sacrafice all the bells and whistles on factory seats. I have a set of carbon fiber Sparcos that weigh just over 16.5 pounds each including mounting brackets. (set saved me 112 pounds) you can find high quality inexpensive lightweight seats that will not cost you an arm and a leg but still save you 75 plus pounds.
Wheels: Invest in a set of lightweight alloys or Dymag carbon fiber wheels, my Dymags weigh 15.6 front and 16.4 rear (set saved me over 40 pounds), these light weight wheels equate to lots of HP as well as better handling abd braking as well.
Cats: get rid of you primary cats if possible, they weigh a ton.
Titanium bolts/screws: I began replacing lots of steel bolts and screws with titanium ones wherever it could be done safely. Ti bolts are not cheap but the weight savings add up pretty quickly, to date I figure I have cut 12 pounds.
To date I have cut about 300 pounds from my car that I can account for. I did not factor in cats because I'm not sure if the larger diameter stainless X-pipe I added negated the cat delete weight loss. but I also added 70 pounds with my roll bar, but after all is said and done factoring in everythin including wheels I would assume I am saving 260-285 pounds at the scale over my car in stock form.
I may have a pair of gunmetal 18x9 kosei's wrapped with 245 BFG d/r's (very little tread left) for sale if anyone is coming to MIR and wants it. I am going to be testing out my 16" CCW's wrapped in MT ET Street Radials (this setup is actually heavier than the koseis, I was surprised)









Whatever they are smoking, tell them to pass it over.