Rear Bumper Weight

[alfizzo]

just pulled off whole rear bumper assemble. total weight is:

54 pounds!

i will post pics latter.

[hkspwrsche]

are you replacing it with something else..?fiberglass shell bumper or something? Also send the info to "widebody911" Thoms website..

[alfizzo]

whole assembly.

[kach22i]

Whats the math equation?

Every 100 lbs = 10 HP?

That would equal 5 hp, 50 lb loss should be better than that. I must have the numbers wrong.

Any help?

Oh, yea it's going to look funny without replacing it with something...........thinking even fiberglass with paint is 25 lbs, right?

[alfizzo]

harold

i will put some glass in the back. man that bumper is heavy.

[RSBob]

I just weighed my primed and painted fb rear bumper (the car is being painted) and it is 8 lbs - total. a 46lb savings for you.

[randywebb]

- how about the brackets?

Still, a huge savings....

[dd74]

The front bumper is also supposed to weigh 50 or so pounds.

[Bill Verburg]

The front bumper is also supposed to weigh 50 or so pounds.

I don't understand how this nonsense persists, it's been posted over and over



All this

weighs: 54#s


Front Al bumper 17lbs
Front valance w/ fog s& chin spoiler 13lbs

Rear Al bumper w valance 24lbs

[alf]

Looks like alfizzo had more stuff on the rear bumber. Big US bread loafs, 2 shocks, accordians and skirts.

Alfizzo, would you mind weighing the individual items? shocks and loaves in particular.

alf

[hkspwrsche]

Isn't that a euro rear bumper in your pic Bill? I think the other bumper also has the heavier US bumper shocks, US Rubber guards and Qt panel extensions. still attached.
Either way we know the US /SC & carrera bumper is hea-vy.....

[randywebb]

" I don't understand how this nonsense persists, it's been posted over and over"

- You don't???

Did you realize that
1. evolution is false, and just a theory anyway
2. Saddam had nukes, and was a big shot with Al Quadia
3. the Earth is flat

Now, the persistence of the urban myth bumper stuff doesn't look so crazy....

Here is an engineering law to memorize:
"Bad information percolates via diffusion laws - if not bulk flow - until it hits a barrier engineered to contain it."

[Craig 930 RS]

I like to hear actual weights - yet 54lbs ?!?? for the whole rear assy?
Even when acounting for the US absorbes and pads...

Seems about 20 lbs too much.

[alfizzo]

here is a better pic in neg image. you can see the whole bumper assembly i took out of my 77 911s license plate and all still attached. i weight it on my very accurate digital scale. it weights 54 pounds. however their has been many post on rear bumper weight but they tend to differ. 54# is the weight of mine with a reference photo of what i weighted. if anyone want more pics i can take more.

[CarreraS2]

If you've ever lifted that assembly in the picture above up (I have!), I think you will agree that 54 lbs is definately in the ballpark, give or take a pound or two.

With the big US pads, shocks, accordians, etc. on it, I was really surprised how heavy it was the first time I picked it up.

[Bill Verburg]

Compare apples to apples

yes, mine is a euro, yes the euro pads are smaller and lighter than US

I weighed the bumpers & valances

some of you have included the shocks, spats, and other parts which are not part of the bumper

[Craig 930 RS]

Yeah, but you gotta count the spats - they are also replaced when alf is gonna do the glass bumper.

I think everyone would love an accurate weight on these components.
I'll weigh the goods when they come off my car early next year.

[randywebb]

"very accurate digital scale"

There can also be differences caused by the measuring instrument. The description above could be a bathroom scale - many are notorious for temperature bias and other problems, including some that are spring scales but use a digital _readout_. Or it could mean an NBS traceable scale... or anything in between.

We might agree to use the term 'bumper assembly' when discussing the entire she-bang....

[alfizzo]

my scale is a $300 400lbs capacity digital scale which has to be calibrated annually. its no $25 denise austin kmart special deal.

[alf]

Alfizzo. Could you weigh the individual parts? I would be useful to know what the various pieces weigh.

thanks
alf