How much does it weigh?
01-07-09, 06:56 PM
#1
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How much does it weigh?
My car that is. Whenever I tell people about my car the first question they always ask is how much does it weigh.. I dont really know what to tell them because the car is still under development.
I am in the process of swapping an Ls1/t56 into it and I've tried to keep weight down to the best of my ability.
Wanted to get some expert guesses.
Here are some specs
-1989 GTU with full T2 brakes, hood, and rear end
-19lb mustang wheels
-interior is mostly stripped but the doors headliner and dash remain.
-The fuel tank is gone and I have a 10 gal aluminum fuel cell in the back
-Dash is gutted of pretty much everything but wiring and no blower motor, no ac, -no power steering.
-ALuminum driveshaft
-Exhaust is a true dual 3" but its done using relativly thin wall 16ga
-Seat belt motors are gone, and just lap belts for now
-No spare/jack, non of that non sense
-Wiring harness has been trimmed
-Most non essentials under the hood are gone including the windshield washer reservior
Thinking about getting a little more extreme with the weight reduction from here including cutting out the spare wheel well and getting rid of the bumper supports and filling the bumpers with foam, but would like to get some more practical (relativly cheap) ideas first. I'm on a budget
It seems a lot easier to take weight off the back than the front btw
Thanks,
Josh
I am in the process of swapping an Ls1/t56 into it and I've tried to keep weight down to the best of my ability.
Wanted to get some expert guesses.
Here are some specs
-1989 GTU with full T2 brakes, hood, and rear end
-19lb mustang wheels
-interior is mostly stripped but the doors headliner and dash remain.
-The fuel tank is gone and I have a 10 gal aluminum fuel cell in the back
-Dash is gutted of pretty much everything but wiring and no blower motor, no ac, -no power steering.
-ALuminum driveshaft
-Exhaust is a true dual 3" but its done using relativly thin wall 16ga
-Seat belt motors are gone, and just lap belts for now
-No spare/jack, non of that non sense
-Wiring harness has been trimmed
-Most non essentials under the hood are gone including the windshield washer reservior
Thinking about getting a little more extreme with the weight reduction from here including cutting out the spare wheel well and getting rid of the bumper supports and filling the bumpers with foam, but would like to get some more practical (relativly cheap) ideas first. I'm on a budget
It seems a lot easier to take weight off the back than the front btw
Thanks,
Josh
01-07-09, 07:57 PM
#3
Oh and the fact that you will have different components than any 'from the factory' FC is extremely hard to make an educated guess of the actual weight because of the particulars of the engine/tranny swap not being common to US on the forum.
Btw why would you cut the bumper supports? Are you looking to make this a race car? Otherwise keep the safety stuff in.
Btw why would you cut the bumper supports? Are you looking to make this a race car? Otherwise keep the safety stuff in.
01-07-09, 08:28 PM
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Oh and the fact that you will have different components than any 'from the factory' FC is extremely hard to make an educated guess of the actual weight because of the particulars of the engine/tranny swap not being common to US on the forum.
Btw why would you cut the bumper supports? Are you looking to make this a race car? Otherwise keep the safety stuff in.
Btw why would you cut the bumper supports? Are you looking to make this a race car? Otherwise keep the safety stuff in.
I would drive it to a truck scale but its not running right now.
The buper supports are a good chunk of weight and they only really help in low speed accidents. In a high speed accident the deformation of the chassis will be what saves me. Only down side would be if I got into a 10mph accident, without a front bumper support all of the accesories on the front of my engine would bite the dust more than likely.
I am keeping the door bars in just for the reason of safety on the street. Much more likely to be seriously hurt in a side impact than front or rear impact.
01-07-09, 08:34 PM
#5
From my understanding the bumper supports are there to channel impact forces in the event of a crash towards the frame of the car. I would assume the speed of the car at the time of the accident would be irrelevant to the fact that they would channel the forces in the best possible way to safe life, but I could be wrong. I asked if it would be a race car because then you would have a roll cage to protect the cabin area and it would be irrelevant.
My best advice if the car is immobile is to weigh the stuff you tore out and subtract that from the posted 'stock' weights in the FAQ threads and then add the weights of what you are adding/swapping.
There is also a forum section dedicated to engine swaps the LSx/T56 is a common one so they might be able to give you a ball park since most have done swaps like this before. This section is usually more versed in normal rotary type stuff.
My best advice if the car is immobile is to weigh the stuff you tore out and subtract that from the posted 'stock' weights in the FAQ threads and then add the weights of what you are adding/swapping.
There is also a forum section dedicated to engine swaps the LSx/T56 is a common one so they might be able to give you a ball park since most have done swaps like this before. This section is usually more versed in normal rotary type stuff.
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01-07-09, 08:55 PM
#8
An FB weighs considerably less stock compared to an FC. It is a smaller and lighter car. Most FC's weigh between 2600-2900 depending on how they are loaded up and what has been stripped. But a truck scale would be the ultimate authority on this one. I think my method was a good way to find a ball park weight.
01-07-09, 08:58 PM
#10
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The 8pt will come but I dont have it yet
The car came from the last owner stripped.
01-07-09, 09:03 PM
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Although I wish it was 2500lbs I dont think I'll be that lucky. I think it will prob be 2700lbs but I want to get it down to 2600lbs if not 2500lbs if its really even possible without going lexan.
The 8pt will come but I dont have it yet
The car came from the last owner stripped.
The 8pt will come but I dont have it yet
The car came from the last owner stripped.
01-07-09, 09:10 PM
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Yeah, thats what I was saying its all aluminum with a plastic intake manifold so even though its a v8, its pretty much as light as a v8 gets. I also took the power steering and ac compressor off. I did get a feel of the weight of those things and they are pretty heavy. I wouldent be suprised if I cut 60-70lbs off the front end between going with the T2 hood and getting rid of those accessories
01-07-09, 09:15 PM
#15
Quote taken from the FAQ thread to help with the calculations. Its at the top of the FC tech section labeled "frequently asked questions-FAQ FC"
This thread also shows the stock car weights: https://www.rx7club.com/2nd-generation-specific-1986-1992-17/specifications-what-did-2nd-generation-rx-7-come-w-options-standard-features-642372/
This thread also shows the stock car weights: https://www.rx7club.com/2nd-generation-specific-1986-1992-17/specifications-what-did-2nd-generation-rx-7-come-w-options-standard-features-642372/
The following weights are from Ted at FC3Spro.com:
Quote:
All items weighed on a Toledo shipping scale (200lbs. maximum, 0.05lbs. resolution) and NCI shipping scale (100lbs. maximum, 0.02lbs. resolution).
We will initially be throwing up random measurements as we weigh items.
It will all be restructured as time permits, but for now there is no particular order to which the items are listed...
Toledo scale accuracy +/- 0.10lbs. - absolute accuracy +/- 0.20lbs.
--------------------------------------------------------------------------------
1989 GTUs/Turbo rims (two measured): used, both include valve stems and balancing weights = 17.10# / 17.05#
--------------------------------------------------------------------------------
1988 10th AE wheels rims (7 openings) (4 measured): Factory painted, used, without valve stems and balancing weights = 21.10# (average)
--------------------------------------------------------------------------------
1987 Turbo II stock pre-cat - used, O2 sensor attached = 13.50#
--------------------------------------------------------------------------------
1987 non-turbo stock exhaust manifold - used = 16.75#
--------------------------------------------------------------------------------
1987 Turbo II stock spare tire and rim - 24.85#
--------------------------------------------------------------------------------
1987 Turbo II stock turbo: used, dirty, NO lines except for rubber lines on wastegate = 21.70#
--------------------------------------------------------------------------------
Aluminum flywheel: used, stamped "MI" (Mueller Industry/Midway Industry?), NO counterweight, NO fasteners = 10.25#
--------------------------------------------------------------------------------
1987 Turbo II stock flywheels (two measured): used, NO fasteners = 27.55# / 27.40#
--------------------------------------------------------------------------------
1987 Turbo II stock front brake rotor: used, 10.9" (Mazda spec, NOT measured), rotor width measured at 5 different positions (5 lug positions) average 21.174mm (actual measured are 21.16mm, 21.18mm, 21.19mm, 21.18mm, 21.16mm; +/- 0.1mm) [Note: Mazda spec new is 22.00mm], used = 12.25#
--------------------------------------------------------------------------------
K2RD Stage 1 brake kit rotor: 12.19" x 1.25", new, two piece steel rotor with aluminum hat, fasteners (safety wired) included = 11.40#
--------------------------------------------------------------------------------
Racing Beat 3" downpipe: used, NO fasteners = 6.50#
--------------------------------------------------------------------------------
Racing Beat 3" pre-silencer - 15.65#
--------------------------------------------------------------------------------
Nippon Denso AC compressor: used, dirty, no fittings but black plastic caps on valves attached = 14.90#
--------------------------------------------------------------------------------
1987 Turbo II stock steel hood: used, windshield spray nozzles and hoses attached, all underhood insulation and front rubber flaps attached, 5A blue paint = 51.85#
--------------------------------------------------------------------------------
1987 Turbo II stock aluminum hood: used, NO windshield spray nozzles or hoses, all underhood insulation and front rubber flaps attached, hood stripped (NO primer base) and repainted yellow = 29.20#
--------------------------------------------------------------------------------
1987 Turbo II stock air pump - 8.80#
--------------------------------------------------------------------------------
1987 Turbo II stock interior heater/AC blower - 6.85#
--------------------------------------------------------------------------------
1987 Turbo II stock AC condenser core - 6.55#
--------------------------------------------------------------------------------
1987 Turbo II stock driveshaft - 13.95#
--------------------------------------------------------------------------------
1987 Turbo II stock driver's seat - 33.40#
--------------------------------------------------------------------------------
1987 Turbo II stock passenger seat - 32.20#
--------------------------------------------------------------------------------
Factory Metal Sunroof (w/out clips, headliner, etc- just the painted metal panel)(3 weighed) - 10.36# 10.40# 10.35#
--------------------------------------------------------------------------------
Fiberglass replacement Sunroof (w/out clips, headliner, etc- just the painted fiberglass panel)(1 weighed) - 5.46#
Quote:
All items weighed on a Toledo shipping scale (200lbs. maximum, 0.05lbs. resolution) and NCI shipping scale (100lbs. maximum, 0.02lbs. resolution).
We will initially be throwing up random measurements as we weigh items.
It will all be restructured as time permits, but for now there is no particular order to which the items are listed...
Toledo scale accuracy +/- 0.10lbs. - absolute accuracy +/- 0.20lbs.
--------------------------------------------------------------------------------
1989 GTUs/Turbo rims (two measured): used, both include valve stems and balancing weights = 17.10# / 17.05#
--------------------------------------------------------------------------------
1988 10th AE wheels rims (7 openings) (4 measured): Factory painted, used, without valve stems and balancing weights = 21.10# (average)
--------------------------------------------------------------------------------
1987 Turbo II stock pre-cat - used, O2 sensor attached = 13.50#
--------------------------------------------------------------------------------
1987 non-turbo stock exhaust manifold - used = 16.75#
--------------------------------------------------------------------------------
1987 Turbo II stock spare tire and rim - 24.85#
--------------------------------------------------------------------------------
1987 Turbo II stock turbo: used, dirty, NO lines except for rubber lines on wastegate = 21.70#
--------------------------------------------------------------------------------
Aluminum flywheel: used, stamped "MI" (Mueller Industry/Midway Industry?), NO counterweight, NO fasteners = 10.25#
--------------------------------------------------------------------------------
1987 Turbo II stock flywheels (two measured): used, NO fasteners = 27.55# / 27.40#
--------------------------------------------------------------------------------
1987 Turbo II stock front brake rotor: used, 10.9" (Mazda spec, NOT measured), rotor width measured at 5 different positions (5 lug positions) average 21.174mm (actual measured are 21.16mm, 21.18mm, 21.19mm, 21.18mm, 21.16mm; +/- 0.1mm) [Note: Mazda spec new is 22.00mm], used = 12.25#
--------------------------------------------------------------------------------
K2RD Stage 1 brake kit rotor: 12.19" x 1.25", new, two piece steel rotor with aluminum hat, fasteners (safety wired) included = 11.40#
--------------------------------------------------------------------------------
Racing Beat 3" downpipe: used, NO fasteners = 6.50#
--------------------------------------------------------------------------------
Racing Beat 3" pre-silencer - 15.65#
--------------------------------------------------------------------------------
Nippon Denso AC compressor: used, dirty, no fittings but black plastic caps on valves attached = 14.90#
--------------------------------------------------------------------------------
1987 Turbo II stock steel hood: used, windshield spray nozzles and hoses attached, all underhood insulation and front rubber flaps attached, 5A blue paint = 51.85#
--------------------------------------------------------------------------------
1987 Turbo II stock aluminum hood: used, NO windshield spray nozzles or hoses, all underhood insulation and front rubber flaps attached, hood stripped (NO primer base) and repainted yellow = 29.20#
--------------------------------------------------------------------------------
1987 Turbo II stock air pump - 8.80#
--------------------------------------------------------------------------------
1987 Turbo II stock interior heater/AC blower - 6.85#
--------------------------------------------------------------------------------
1987 Turbo II stock AC condenser core - 6.55#
--------------------------------------------------------------------------------
1987 Turbo II stock driveshaft - 13.95#
--------------------------------------------------------------------------------
1987 Turbo II stock driver's seat - 33.40#
--------------------------------------------------------------------------------
1987 Turbo II stock passenger seat - 32.20#
--------------------------------------------------------------------------------
Factory Metal Sunroof (w/out clips, headliner, etc- just the painted metal panel)(3 weighed) - 10.36# 10.40# 10.35#
--------------------------------------------------------------------------------
Fiberglass replacement Sunroof (w/out clips, headliner, etc- just the painted fiberglass panel)(1 weighed) - 5.46#
01-07-09, 09:52 PM
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prob weighs more than that, even the NA 13b and tranny combo weigh more than that I believe.
The engine is about 420lbs usually, mine should be in the high 300s now, and the T56 is where the real weight gain is, its huge in comparison to the rx7 tranny, its about 125lbs
The engine is about 420lbs usually, mine should be in the high 300s now, and the T56 is where the real weight gain is, its huge in comparison to the rx7 tranny, its about 125lbs
01-08-09, 09:29 PM
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I just wanna get an idea a 100-150lb range.
01-09-09, 01:12 AM
#22
I weighed my car at my friends farm scale which is VA certified to within 20 pounds and it was 2740 with me and a half a tank of gas. Take into account I weight 170 pounds, plus the weight of the gas, and thast pretty good for an FC.
Its an 88 GXL and at the time the only things removed were an air pump and AC, it has convertible bbs wheels too.
I think by now its probably down in the low 2600s with me in it, but the motor is dead so I cant weight it
Its an 88 GXL and at the time the only things removed were an air pump and AC, it has convertible bbs wheels too.
I think by now its probably down in the low 2600s with me in it, but the motor is dead so I cant weight it
01-10-09, 10:56 AM
#24
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I took mine to the local flying J truck stop and had it weighed for $10. My car was ~2750.
Reductions:
No air pump, power steering, ABS, AC, stock radio & amps and some other light items. 16" Mustang Rims.
Additions: RB Exhaust, big radiator.
I'm going to guess and say that you're pretty close to stock TII weight.
Reductions:
No air pump, power steering, ABS, AC, stock radio & amps and some other light items. 16" Mustang Rims.
Additions: RB Exhaust, big radiator.
I'm going to guess and say that you're pretty close to stock TII weight.
01-10-09, 11:07 AM
#25
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That's comparing an LS1 to a 13B-REW. A REW might be 1.3L, but the full block with all the accesories tied into it weighs quite a bit. The twin turbo system is rather heavy for it's small size.
What model RX-7?
EDIT: Sorry, I reread your first post. 89 GTU is rather heavy, I am thinking you will come in at between 2700-2800lbs fully dressed.
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