swapped ti weight

[ti3]

I didn't really look up alot of old threads to post in, so I am just making this one, just wanted to share a little info on my ti. I weighed it today at a truck stop, (20 lb increments only) and here are my results, with the following mods, s50 swap, vader front drivers seat, passenger seat delete, no spare, CF hood, m3 battery(the big one) relocate to the rear, k&N cold air, A/C delete, no Sunroof, and custom exhaust setup single 2.5inch pipe to the back, highflow cat, Borla XR-1 16" muffler. Stock ti suspension, and 16"(I think, possibly 15 inch) steel rims/tires This is with a 245lb driver still in drivers seat for all three weights and about a half a tank or so of gas...(not quite sure, my gas gauge is busted) Front only: 1560(swapped back and forth between 1560 and 1540) Rear only: 1340 Whole car: 2880 The way I figure, that leaves the car around 2635lbs, if I were to use a lightweight(maybe20lbs or so battery), alloy rims, and a racing seat, or something lighter (because the vaders weigh like 60-80 lbs... they are VERY heavy) then my car would be around 2550 lbs. pretty light if you ask me, considering I just read a post about the mini S and that weighs a little more I think. Anyone else have stats on their weight with a swap or anything? Also, assuming 1540 for the front weight, because the total leads me to believe it was closer to 1540 than 1560, that puts my weight distribution around 53.5% front 46.5% rear.

[J!m]

A stock "332ti" is estimated to be about 2850#

Stock M3 Coupe is 3175#
Stock ti is 2745#
(From BMWCCA racing stats)

Another actual stock ti weight I have is 2760# with swapped in Vader seats.

[ti3]

When you say stock, what options does that include? sunroof? a/c?... etc. also is that a full tank of gas or not? Because depending,I have shed about 2760-2635 = 125 lbs... also, which battery is that, the ti battery or the m3 battery. I am currently using the m3 coupe battery from my donor. I figure about 60lbs for the passenger seat, plus 15-20(possibly more) for the CF hood, a couple lbs here and there for a/c, sunroof, spare tire, etc. I guess it adds up quick. Also, side note, wikipedia says curb weight stock 318ti is 2590-2800. Any ideas on how to lighten the front some more to get it back to stock weight distribution? I will be doing suspension, rims tires, brakes, etc, soon, but I will be upping it to the m3 brakes, which are a bit beefier, not sure how much heavier they are. I don't know about the rear yet, haven't done enough research. but I will also be getting better lighter rotors, so I'm even more unsure of how much or little the weight will be affected, not to mention the difference between the sprung and unsprung weight. My first goal is to loose a little weight... that will help, hah. Anyone else have stats on weight? or distribution or anything? any suggestions on how to lighten it further? I'd really like to loose the weight in the front if at all possible, but I am running out of things to do up there. I May take out the windshield wiper fluid, that might be a pound or two...

[J!m]

I have done a lot of suspension work to my car, and altered the wheelbase slightly because of it.

All the details are in my swap manual (several pages of it) so I'm not inclined to re-type it here, but you can do a bit more. Although with S50/52 power, you want to be a bit nose-heavy anyway, due to weight transfer under acceleration.

Handling:

Get some caster, good tires and light wheels and oversteer will go away. A LSD is absolutely essential in a swapped car to keep it straight out of the corners.

Weight:

What exhaust are you running? If you have an S50 and run an S52 exhaust, you can save a few pounds as the S50 manifold is cast iron and the S52 is tubular stainless steel.

Run the M3 brakes with the Euro floating rotors. That will be about the same total (unsprung) weight as the ti brakes.

E30 LCAs could be used (Aluminum) and save a bunch of weight; However these cannot be used for the altered wheelbase mod.

GUT the car. All sound deadening in the car and rustproofing under the car, light driver seat (which you know) light battery, all convenience lighting and its wiring, all plastic trim everywhere (including inner fenders). It all adds up. Front fenders are quite light, but acid dipping can shed a few grams (but that is expensive and hard to find these days). Perhaps M.A.Shaw has some E36 Sedan glass or carbon fenders, but they won't be much lighter...

A/C: Most people delete A/C by removing the compressor and condenser in front of the radiator. Remove ALL the A/C components from under the dash as well as all brackets related. Pull wiring from harness as well. Delete dash switches for the compressor and the wiring.

[ti3]

I have the swap manual, but somehow it got misplaced, and now I have spent the last 4 months looking for it to no avail... I'm sure I will find it again eventually, but for now its possible my friend has it in with his tools... DOH! oh well, I have a few things I have in the works that I need to spend my money on now, so some of that stuff can wait. Also, I want it for the street, not the track(at least right now) so don;t want to take out all the sound deadening stuff just yet. I already took out both door panels, because they were messed up, but I think I mentioned that already. Do you happen to know how much yours weighs j!m? and what your weights are front/back?

[J!m]

I have not weighed my car still.

When I do I will have front, back and both for sure.

Most truck stops that show the big "CAT scale" sign will do it if you ask ahead of time...

[wolferj-RIP]

Here's my pre and post swap weights;

http://www.318ti.org/forum/showpost....0&postcount=33
http://www.318ti.org/forum/showpost....3&postcount=60

I had posted these up in the Battery relocating thread...

[dahamler]

My car weighed 2551 with the following:
S52
Passenger seat (installed)
35 lbs racing seat
Carpet removed
Backseat removed
No A/C
Sunroof
All other interior bits removed except the door panels.

[ti3]

When you say passenger seat, do you mean removed? or still there?

Yeah, I went to a truck scale at a rock yard, I went in and asked the guy if it would be okay and he gave me no problem, he said, what you got there a bimmer? yeah, just drive on through, the weight is displayed in the corner there, Buddy of mine came through here the other day and weighed his car too, have at it.
My dad also got his car weighed at a junk yard place, because they weigh the car before and after you unload so they can determine how much money to give for the scrap metal. Seems most of them don't care if you use it, but its nice to just ask first anyway. Its not like you are gonna break the scale with our little 1 and a quarter ton vehicles, considering most of the scales for the trucks go up to and over 17tons, and some way more.
Also, wolfer..? what mods, etc, and are those weights with you in the car or not... etc... Seems like yours is heavy compared to dahamler and mine. full tank of gas + driver??? I am curious. now I want to take everything out and go weigh mine again to see just how light I can get it... haha. BTW my rear seats and everything were still in the car for my weigh in but no spare, or tools. How much more does the sun roof weigh than no sun roof. Also, I think I saw some people with a CF replacement instead of the sunroof, etc... weight savings?

[wolferj-RIP]

That weight is with half tank of gas, no driver. I have done no lightening of the car, and have Vader seats, which weigh 70+ lbs apiece.

[Bluebimma]

Posted from another forum.

O yea, had the car weighed in today as well, ~2780. 2.5 Iron block, 5 spd, medium cased lsd, single 2.5", OBD2 headers, full leather manual interior, audio/subs installed, a/c+p/s removed. This is is how much a stock 318ti weighs with the iron blocked 4 cylinder, and there is still a lot of room for improved in weight savings.

Ive had my clubsport weighed before the engine swap, it was 2760 with subs, sport interior, cd changer, subroof, a/c, p/s, full interior, bbs 17x8.5, and a spare.

My moreagrun metallic 325ti had been weighed in at 2720 with the m50b25, m3 brakes, mille miglia 17x8, no spare, no a/c, p/s, insulation removed, spare removed, full interior, sunroof, medium case 3.25lsd, 2.5", odb2 headers, mcoupe catback.

Having the 357ti weighed pretty soon for records.

[RAiMA]

My car weighed 2920 with about 66# of fuel in the car on the weigh bridge. This was without turbo/intercooler etc, but it had the larger gearbox, m3 brakes, larger diff etc.

[nineball12]

i just had my white ti weighed = 2740lbs. It's got a/c, powersteering, cruise, sunroof, manual cloth seats, s50, m3 tranny, 11# flywheel, m3 clutch, m-coupe diff, m3 front brakes, 17x9 bbs rc's, long tube headers with 2.5" exhaust w/ 2 magnaflows, full interior, momo wheel, and no spare tire.

[wolferj-RIP]

Originally Posted by nineball12

i just had my white ti weighed = 2740lbs. It's got a/c, powersteering, cruise, sunroof, manual cloth seats, s50, m3 tranny, 11# flywheel, m3 clutch, m-coupe diff, m3 front brakes, 17x9 bbs rc's, long tube headers with 2.5" exhaust w/ 2 magnaflows, full interior, momo wheel, and no spare tire.

Does this mean you have the new motor in and running?

[nineball12]

Originally Posted by wolferj

Does this mean you have the new motor in and running?

yes, it's got a 69k s50 and i swapped in an m-coupe 3.23 lsd with the finned diff cover, really glad i replaced the 3.73 even though the car's slower now