i finally weighed my iroc
hardtop
ls1 swap
t56
stock k member
full interior
power accessories
4th gen dash including ac ventilation etc
c5 seats
but no ac yet
hardwood cowl
4th gen rear and al. drive shaft
18" replicas!
3/4 tank

weighing at 3260lbs the car by itself

 

Nice, I'd say thats a respectable weight for what you've got

 

I hope to weigh mine soon to see where it ends up this season.

 

Now we can use your car as a benchmark! Thanks for posting this info.

 

I weighed my IROC as well at the drapstrip last summer:

LS1/T56
T-tops
stock K-member
Full interior, power everything
No A/C
No emissions
Big heavy 18" billets
LS1 brakes front/rear
aluminum DS
Full tank of gas
no spare tire/jack
no driver

3340lbs.

 

GREAT info guys, thanks for posting it - now I'll be able to see where my car stacks up once the swap is complete...

 

You guys running SFCs at all?

J.

 

That is what I was guessing it would weigh with all your parts.

 

Mines 3480 but I have a 9" all tublular stuff, SFC's etc

 

Damn good guess. Haha.

Anyway, I plan to have my car weighing around 3000. Which I don't believe to be hard. Think aftermarket.

 

Yes sir....Alston's

 

Spohn here.

 

Curious to know those with weights, where / how did you get them weighed?

 

any truck stop should have a scale. some tracks also have a scale as well.

 

I hope to get mine weighed at the track next month.

Berlinetta #1 weighs 3450 going down the track with empty trunk, 1/4 tank of gas and me (less when my son is driving it. . . ).

 

Sorry to crash the LS party, just another benchmark, 3/4 tank with power everything, and all the parts in sig was 3390... be nice to drop 100lbs with an aluminum LS when the LT goes boom.

I still laugh at the thought of shelby gt500 convertibles weighing in at 4000lbs.. jeez I guess you get even more than you pay for.

 

Hmmmm....I woulda guessed a little lower on the LS1 cars.

Next time I pass a truck stop (which is RARE) I'll weigh in....wait a sec....Scrap metal yard! I know where one is with a drive-on scale.

 

certified scale here at my work

 

I think the "magic" weight would be about 3300lbs which would include a 175lb driver and a full cage. Obviously there will be a lot of aftermarket parts, but I think it can be done.

 

i dont have any sfc yet. but i am runing a 4th gen tank
roughly 100lbs less with out rear seats cargo lid. and unecessary stuff in my trunk ?? .. lol

 

This gives me hope to have a 3200-3300lbs street car. I plan on a tubular front end when I get the money for it after the planned swap.

 

My '83 with 1990 383, a/c, sub frame connectors, pwr windows, 3/4 tank of gas, no driver...
3470 lbs/ on Intercomp race scales
I'm hoping for 3300-3350 with my LS1 (whenever that may be).

 

i wish i would of swapped everything over to my 86 base model (v8 5spd)
it was 3150 with the iron 305

 

Mine weighed 3520lbs with a sbc/t56 and everything else was identical to now aside from the LS1 swap. Yet to weigh it since so I would guess I'm down 150lbs or so

 

whats with 4th gen tank? is it a bolt in? probably easier too since ith has high pressure pump. think any weight savings there?

 

That seems a bit heavy for an ls1! That would mean my car weighs atleast 100lbs more than what yours all weigh... Even more cuz i have 305tpi with a 700r4...!

I thought our cars were lighter and an LS1 would have brought it down to near 3000lbs.

 

Define "bolt in".

As you probably know, there is no such thing as a bolt-in. The lines are different than 3rd gen, the wiring is different than 3rd gen. But, the tank itself will "bolt in" right where the stock 3rd gen tank was.

Didn't seem to be much lighter, I'd guess because of the evap stuff on it. But, since the evap stuff won't be needed on the other end of the car, it's probably a net weight savings.

 

Also more weight on the back is better than on the front!

 

heh, the rear seats weigh nothing.
cargo lid is only a few pounds, but you may have a lot of other goodies in the back of your ride.

What do you guys think I'd be weighing in at with a tubular k member, a arms, coil overs, aluminum drive shaft, no wiper motor, no a/c, aluminum heads, no spare tire, no air pump, stock rims, man i can't remember what else i nixed. i'm actually thinking about replacing the rear window with plexiglass. Does anyone know a company that does that work?

 

don't do the rear window... you need it for traction, plus i heard you can't have a defogger with it anyway.

BTW how much lighter was the tubular from k-member and a-arms compared to stock and which brand did you buy? Spohn?

I also heard coil-overs weren't good for the street and only drag racing... this is just what i've heard though it might not be true...

 

could go with a notch back conversion...but yea, there are some places weight should be added and not taken away, taking away weight under the hood is good, taking it from over the back tires is bad.

 

You are right, i knew i would loose my defogger. Between that and the needed weight on the rear tires, I think i'll pass on this idea. I did relocate my battery to the hatch though.

I don't know how much lighter the tubular cross member is. I didn't weigh eitherof them. I'd say the tubular k member is at least half the weight of stock cross member and A arms. I got mine from PA Racing. Tell you what, if i did it again, i'd go with Spohn in a second. They did a much better job with the design. There are provisions for the brake lines, and you don't loose the chassis stiffeners like you do with the PA one.


I've heard no driveability issues with the coil overs, and I've heard what you mentioned. My engine isn't done yet, so i couldn't tell you, and it's been so long since I've driven it, i won't remember how it used to drive.

 

thats pretty heavy,i have a stock ttop auto 91 RS that weighs 3300 with 3/4 a tank of gas. and 3435 with me in it.

ive pulled the rearseats(not belts),spare and jack,and A/C and most of the emissions.

 

I wonder how much heavier an iron 6.0 with aluminum heads would be as opposed to an LS1?

 

80 pounds more IIRC. But the extra HP makes up for it IMO.

 

thats the plan,
im going th350, but dont let its size fool you, that bastard is just as heavy if not heavier than t56.

 

no a T56 is heavier than a th350 with a 10" converter IMO

 

how heavy is an 86 stock 700r4 compared to the t56?

 

From LS1 tech thread:
The T56 is about 130lbs dry w/o bell. While the T5 is about 75lbs dry. that sixth gear is heavy! but well worth it IMO.
From SyTy.net:
The 700R4 is about 130lbs.

 

Well, that's good to know. At least my transmission difference won't be very much. Wonder what a old 4 speed would weigh lol

 

well, i thought i would run by the scale today to see what my car weighs.
its an 84 trans am, with all the body kits off an 88 gta, rims etc. has ttops, subframe connects, a ford 9" with a locker, all the seats, and 3/4 tank of gas.
i was thinking it would be around 3400 since that 9" we put in was so heavy, but i guess i was wrong.. turned out to be 3140 thats without me of coarse.... and i havent even done any weight reductions yet!
i still plan...
4th gen seats
plastic ttops
and a/c removal
as well as some other small things.

 

it is lighter, i believe the 4th gen is plastic and the 3rd gen isnt.

 

Haven't weighed one myself, but everything that I've read on here says that the weight difference is negligible...

 

I can vouch for the 700r4. I had one fall on my chest.

Slipped off the pins and jack when installing it. Thankfully it only had about 18" to fall.