So I weighed my FB tonight...

[P71]

In the middle of a *ahem* "sporting drive" I happened upon an easy way to hit the truckstop on I-5 by my house, so I figured what the hell. Stock 1983 RX-7 GSL with power windows/mirrors, cruise, A/C, glass sunroof, and full emissions intact with a full tank of fuel (minus about a gallon from the station to the scale) and the spare, jack, etc still inside.

2,650 Lbs.

Considering I weigh about 235 at the moment that's not bad! So 2,415 for an all-stock, fully-loaded FB, with a full tank. Figure I run it at about 1/3 tank in the autocross, plus no roof/spare/jack/spare oil/etc. Gas weighs 6.15Lbs/gallon, so take out 60Lbs of gas, and maybe 25Lbs for the roof/spare/etc and it's maybe 2,565Lbs when I autocross.

I'll re-weigh it as I take stuff out (A/C, emissions, exhaust, interior stuffs). I'd like to get it around 215Lbs out to bring it to 2,200 without me and under 2,500 with me. So figure the A/C stuff weighs quite a bit, same with the smog pump and the factory exhaust manifold. Also relocating the battery and replacing it with a lighter one, also going to a lighter interior insulation and seats. Should be doable, right?

[josh18_2k]

those are incriments of 50, so pretend its 2601 ;-)

[need RX7]

Damn, that is really light.

Kind of off-topic, but can you go to any truckstop and get a car weighed or do you know someone there or something?

[Kentetsu]

The emissions parts and AC do weigh a ton. I couldn't believe how heavy that shit was when I pulled it all off. Not a bad weight for an SE...

Oh yeah, and get rid of the cast iron water pump housing while you're at it. The 2nd gen came with an alloy version and will bolt right up for the most part.

[P71]

Actually they are increments of 20, but it kept flashing back and forth between 40 and 60 so I said 50.

You don't have to know anybody, just drive right through. Obviously there was nobody there on a Saturday night, so I didn't upset anybody. The scales are always on.

And mine isn't an SE. It's a plain-jane 12A powered GSL, albeit heavily optioned (I believe leather and the auto trans are the only things missing).

[PercentSevenC]

Makes me want to weigh mine. No emissions or AC, some engine bay simplification, and a lightweight exhaust, but it does have a 13B. The aluminum water pump housing and the Weber setup probably shave off several pounds.

[Whizbang]

The emissions parts and AC do weigh a ton. I couldn't believe how heavy that shit was when I pulled it all off. Not a bad weight for an SE...

Oh yeah, and get rid of the cast iron water pump housing while you're at it. The 2nd gen came with an alloy version and will bolt right up for the most part.

problem i found with that is the pump housing to engine flange like to leak where the one stud doesnt work out.

[85rx-7gsl-se]

That is light...My FB without me in it weighs 2600lbs...But I do have a 13BT and a/c :D

[jtbshaw]

You can get it there. My last 84 GSL build that I did weighed 2242lbs with me in it. I was about 220lbs then, and this was with a full tank of fuel (15-16 gallons in a fuel cell). My interior was gutted, lightweight racing seats, underneath the dash was gutted, spare tire and jack, engine compartment was cleaned out, even went down to installing carbon fiber pedals. On 100 shot of tha juice, the car dyno'd at 409 whp. Needless to say, it was a fun little car.

[need RX7]

weighed 2242lbs...dyno'd at 409 whp. Needless to say, it was a fun little car.

:117: Sounds like it!!

[drewski86]

Mine is 2430lbs. with me(~190), a few tools and less than a quarter tank. I'd guess it's 2200lbs. empty. '85 base with an '87 6port.

[orion84gsl]

You can go to any truckstop and scale your car. Most you will have to pay the scale fee which is usually between $7-$10. The attendants dont care, as long as you pay.

My buddy Sam and I weighed our cars at the Flying J in town and it came out as 2240 for his car and 2480 for mine. Full tanks and spare and jack in and without us in the cars. A few reasons why my car is so much heavier are I have a Sterling, and if you've ever picked up a Nikki you know they are rather heavy, and he only has ITB's which are fairly light. I have a full RB SP dual exhaust, whereas he has an SDJ header and thin piping. His car has most of the useless wiring stripped and I don't. He has the RE-Speed R&P kit and I still have stock steering (not for long though:) ). He has a Mariah front bumper which requires the removal of the stock steel bumper in place of a thinner, smaller metal frame. Mines stock. I also have a Rockford 400 Watt amp and he is using one or two much smaller amps and no rear speakers.

[eprx7]

the last time I weighed my car was at the Toledo Pro Solo.
It scaled @2016 lbs. with 1/4 tank of gas, no interior except for the dash and a 15lb. race seat. I swaped out the steel sa bumpers for aluminum fb bumpers but used a hole saw to drill 2" holes in the aluminum to lighten it even more. theres no emissions or a/c or power steering on the car. i also have very light 13 x 7 panasports with hoosier cantilevered slicks. the car was weighed without me in it so you could add 220 lbs. to get the wieght down more I plan on gutting the doors and replacing the glass with lexan.

[Whizbang]

the last time I weighed my car was at the Toledo Pro Solo.
It scaled @2016 lbs. with 1/4 tank of gas, no interior except for the dash and a 15lb. race seat. I swaped out the steel sa bumpers for aluminum fb bumpers but used a hole saw to drill 2" holes in the aluminum to lighten it even more. theres no emissions or a/c or power steering on the car. i also have very light 13 x 7 panasports with hoosier cantilevered slicks. the car was weighed without me in it so you could add 220 lbs. to get the wieght down more I plan on gutting the doors and replacing the glass with lexan.

i think i have seen your car once while picking up some parts, i could see it being 2016

[eprx7]

I think you stopped out at my house to pick up some se parts I had for sale.
did you finally move to Colorado?

[TheDriver216]

I think you stopped out at my house to pick up some se parts I had for sale.
did you finally move to Colorado?

I think just about everyone on OHR has bought parts from you Marc..

[P71]

Update: 2600 exactly with me and a half tank.

[eprx7]

I think just about everyone on OHR has bought parts from you Marc..

Not everyone but its close. now I wish some one would buy the whole car I have for sale.:)

[Onlyonthurs]

last time i wieghed mine it came in at 2415 ...and that was with me and a friend of mine i nthe car and i had a bunch of tools in the rear bins :) ........oh and i still have the WORKING A/C system in my FB

i have a 1982 GS with no sunroof.

[Whizbang]

I think you stopped out at my house to pick up some se parts I had for sale.
did you finally move to Colorado?

Yup

[j9fd3s]

ive put a couple on the scales over the years.

stock 83 LE, full tank, empty drivers seat, 2330, thats with full smog, and ac

stock 79, its a GS, but no a/c, same deal full fuel, no driver, i think it was like 2440ish, maybe 2380? lol

[P71]

UPDATE!!!

Same car, now with RB header and 2.5" exhaust (no cat but does have resonator and muffler), RB air filter assembly, no smog pump, no A/C (compressor, brackets, condenser, lines, wiring), 3/4 tank, with my fat butt and the glass roof:

2540Lbs

The glass roofs weighs 15Lbs and I weigh 230Lbs.

So with a 1/4 tank, no roof, no spare/jack/tools/oil it should weigh 2500 with me in it. Nice.

[Twilightoptics]

Weighed mine a few months ago. 2550 with me and 3/4 tank. I'm 205.

No emissions or A/C.

Power options, and some stereo equip, glass sunroof.

'82 GSL.

Never would have guessed it was so light! I'm used to crossing the scales around 4k in my Camaro and Jeep!

Gotta love power to weight!

PS Thanks for the info on this site P71!
-Paul

[P71]

Hey Paul, nice to see you here.

[fbRXse7en]

my '83 Toyota ae71 'rolla coupe sr-5 (rwd) weighs in @ about 2,230lbs (via truck scale on i5 sb, just before 128th st exit), w/o me (165lbs)...no a/c and all 5 rear windows are lexan (each lexan window weighs LESS than 50% of original glass...i weighed each piece..) i know its not an RX....wish it was...been tryn to sell/trade...grrr.

[PercentSevenC]

Ya know, you could always make it an RX... ;)

[fc3sfreak415]

i weighed mine on the scale at work and mine weighs 2180 with me in it

[730RWHP12A]

weighed mine on the truck scale. 1,600 full interior,full chrome moly cage :) all motor :)

[730RWHP12A]

weighed mine on the truck scale. 1,600 full interior,full chrome moly cage :) all motor :)

wanna see what it looks like?

[j9fd3s]

wanna see what it looks like?

swiss cheese? yes btw, we do wanna see it

[730RWHP12A]

teaser pic, glass windshield too :)

[85rx-7gsl-se]

I wanna know more. This may encourage me to consider staying FB instead of going KP61.

[730RWHP12A]

I wanna know more.


like what?

[TS87FC3S]

Sub 2000 lbs pics in build thread. 84 autox monster(hopefully)

[85rx-7gsl-se]

like what?

Just curious as to the basics. My full interior S/E with a TII swap and A/C weighs 2600lbs. I have been considering taking my driveline and placing it in a KP61 starlet to get my weight below 2000lb with full interior. If I could accomplish the same weight goals in my FB without being a stripped down shell I may stay FB :D

[TS87FC3S]

Just curious as to the basics. My full interior S/E with a TII swap and A/C weighs 2600lbs. I have been considering taking my driveline and placing it in a KP61 starlet to get my weight below 2000lb with full interior. If I could accomplish the same weight goals in my FB without being a stripped down shell I may stay FB :D


http://rotarycarclub.com/rotary_forum/showthread.php?t=14280

barely sub 2000 lbs with all gutted, racing buckets and no structure behind dash and no sound deadning

[730RWHP12A]

two more teaser pics ;)

some of the stuff i removed or swapped out for lighter parts

bumper supports
headlight motors
air conditioning
swapped out factory radiator for aluminum unit
everything behind the dash is gone
all tar has been removed throughout the car
hood swapped out for carbon fiber unit that weighs 7 pounds
rear glass/ side windows swapped out with lexan
door support bars have been removed
aluminum front hubs/ lightweight brakes installed front and rear
lightweight aluminum wheels were fitted all around
rear sway bar is gone
30 pound battery swapped out for a 2.2 pound lithium ion battery
im sure there is more but thats the main stuff i can think of at the moment.

the car would be lighter if it didnt have the heavy mustang rear end or the G-Force tranny along with the 28 pound flywheel but i need it for drag

[sgt.stinkfist]

weighed mine on the truck scale. 1,600 full interior,full chrome moly cage :) all motor :)

nice, ive been gone for a while, but i didnt know you were goin all motor nowadays :o

[730RWHP12A]

nice, ive been gone for a while, but i didnt know you were goin all motor nowadays :o

i have the turbo car still, i will never get rid of that car1!! just want to play with all motor,so i put this one together, see if i can set a new record or something :)

p.s. how is the cheese these days in Wisconsin? mmmmmmmm

[sgt.stinkfist]

Well aged and extra sharp, the way I like my cheddar ;)

[730RWHP12A]

front end teaser pic

[j9fd3s]

that hood is sweet!

[730RWHP12A]

a shot of the rear with the bumper support removed, 30 pounds of weight savings and it looks untouched! :)

[13x]

front end teaser pic



Dude where did you get those headlights??!?!?

[730RWHP12A]

Dude where did you get those headlights??!?!?

i made them. in the street all motor class you need working lights, and these are lightweight, and they light up ;)

[730RWHP12A]

front end shot, front bumper support is gone, cant even tell ;)

[13x]

i made them. in the street all motor class you need working lights, and these are lightweight, and they light up ;)

I am sure you've heard this before but excellent job they look great. I saw those and said to myself if I could get my hands on a set of those with how I am doing my car would look awesome, oh well lol

[sen2two]

front end shot, front bumper support is gone, cant even tell ;)

Do you still have the stock subframe in it, or did you go with a FC subframe and suspension for the front?

[Whizbang]

i have been trying to think of ways to shave weight. I want to redo my door bars in the cage then remove the crash bar from inside the door. Probably about 50lbs between the two.

Lexan wise, I was considering forming my own doort and 1/4 glass windows. Not sure if there is a cheap way to the rear. The glass must be the same thickness or greater than the original glass for rallying.

I plan on trying my hand at fiberglass here soon too.

[sen2two]

Luckily for drag, your allowed to have 1/8" lexan all the way around. That's a huge savings for 1st gens...