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-   2nd Generation Specific (1986-1992) (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/)
-   -   What makes the FC so heavy? (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/what-makes-fc-so-heavy-690764/)

got_boost 09-27-07 12:23 PM

my FC base model weighted 1140 kg (2513.7 lbs) it was with the alum hood, no sunroof, and 2+2 seats.
now i dont know, T2 swap, all emissions removed, single exhaust,t2 alum hood, no ps, no ac. i think it might be a little lighter.

as my 240sx fastback (before the RB25DET swap) weighted 1240 kg (2734.2 lbs).
with the r33 skyline engine in it, its not THAT more heavier.


EDIT: we should compare the T2 FC with MK3 Supra Turbo and S13.
i know the FC went thru 2 phases S4 and S5, just like the S13 with the CA18DEt and then the Sr20det.
im sorry i dont know the history of the Supra, so we'll try to stay with teh S5 T2 ans Sr20 S13 fastback.

The Wankler 09-27-07 01:29 PM


Originally Posted by finishline (Post 7358763)
the driver. :bigthumb:

I like that answer!

GarageAlchemist 09-27-07 02:08 PM

Ive owned 6 DSM's, 4 Honda's and an S13. Personally, i love the feel of the FC over any of those cars. My car is 20 years old and doesnt rattle, creak, squeak or make any other annoying noises, and feels much better than any of the other cars ive ever had. If a little extra wieght is what it takes to get that feeling, then thats fine by me

phoenix7 09-27-07 02:22 PM

:rlaugh: I guess you guys can't really read. The car is not heavy, it's heavier than SOME cars but that doesn't mean it's heavy. That's like saying your 3" penis is HUGE! when you compare it to a newborn's then hell yeah it's huge but that doesn't mean it BIG! when are you going to let this thread die?

mazda.junkie 09-27-07 03:06 PM

Basically, everyone thinks the FC is so much bigger than the FB, also a lot heavier, it is only true by the smallest margins. It's the appearance difference that throw most people off, side by side there very close in size.

1st Gen 1981 + up Dimensions/ length=170.1 compared to S4 168.9, S5 169.9
FB=.02 longer over an inch longer than S4 (probably due to the bumpers)
FB width= 65.7/ FC= 66.5
FB height= 49.6/ FC= 49.8
FB wheel base= 95.3/ FC= 95.7
"average weight''= 2450 84 to 85 GSL-SE = 2512/ FC averages 2600 for n/a

So basically there's little difference, and the FC was designed to compete with the more "tech" GT style, more luxurious mid-80's trend's of the era.

synergy7 10-08-07 10:10 AM

I dont think people should try to compare the fb and fc they are different in every way. The dimensions look similar on paper but to the naked eye (side by side) FB's look smaller and FEEL much lighter. IMO

The real question should be why does an 89-91 weight so much more than an 86-88. I love the styling changes on the 89-91, but if I were pure racer I would look for an 86 with no power featurs those where the lightest of the second gens including the gtu(s)'s

Black91n/a 10-08-07 11:17 AM

Actually the bare shells weigh the same, the added weight in the S5's come from added features, and things like that.

ericgrau 10-08-07 02:52 PM

I believe the s5 also has less aluminum pieces. The s4 went crazy with aluminum to get it into a lower weight category for the EPA gas mileage rating. It was to avoid a gas guzzler tax or some such I believe (and a bad reputation). The s4 needed to save ~100lbs. and in the end it saved ~200. I'll bet the s5 still kept some of the aluminum, but not all of it.

Let me put it this way. This why the jack is aluminum, to save a pound. This is why the electrical wires are coated with lightweight insulation, to save some ounces. This is why tons of random bits are aluminum. Yeah, they went nuts.

Personally I'm glad I have an s4 for this and other reasons, but it'd be nice to have the s5 engine and intake in my s4. I know the s5 is faster.

rexsleven 10-08-07 05:31 PM

I sort of thought my FC was sort of heavy. but now you guys mention that it is pretty buff underneath is a good logical reason why it is sort of heavy compared to a s13 coupe. but i weigh about 3000lbs with me in it with a full tank of gas. and i have the gxl with all the extra goodie goodies in it so whatever i love my car. plus my electronics work! god i even have ABS on mine. but. i luv it

BLKTOPTRVL 10-08-07 07:49 PM

A "Mini" weighs in at 2600 lbs. A FC is not really heavy at all.

sub9lulu 10-08-07 08:17 PM


Originally Posted by BLKTOPTRVL (Post 7400541)
A "Mini" weighs in at 2600 lbs. A FC is not really heavy at all.

u talking abt a "new" mini
the old ones are way lighter

dial8 10-09-07 09:24 PM

Stupid Ebay parts that have no benifit(CAI), drivers who putz around but still think TEH SE7EN CANT' LOSE(learn how to drive properly and master techniques that real drivers use and you'll swear the car is tons lighter and has a million more horsepower), and JDM parts that have no real value except for being "JDM".

If you think the FC is heavy, sell it and by a CRX.

Black91n/a 10-09-07 10:23 PM

Heavy is relative, it's heavier than some, but lighter than others.

slo 10-09-07 10:31 PM

comparing the FC to FB several posters comment on the fact that the FC meets stricter crash standards, and yet it has 2MPH bumpers with cores made of plastic direct mounted to the frame vs the FB's 5MPH bumpers with thick aluminum bumper cores and shocks between the core and the frame

synergy7 10-13-07 11:36 AM

RELATIVE 1. Having pertinence or relevance; connected or related. 2. Considered in comparison with something else. 3. Dependent on or interconnected with something else; not absolute.

This is a great word; it sums up this post very well... Heavy compared to what??? Light compared to what???

Relatively speaking the car is equal or lighter than most sports cars; Americans got fatter and so did our cars look back at lets say a Toyota corolla these cars have gotten bigger and heavier over every model year as have most cars

Rx7 were light (not supper light “old mini”) when they came out and they are still very light now (by today’s standards). The new 70k C6 vette has been praised for tipping the scales at just around 3000lbs. With plenty of exotic materials like carbon fiber & titanium to get there (not just plain old aluminum)

The fact is the newest 2nd gen 7 is nearly 20 yeas old and the designs for the car are way older than that, but some how the Rx7 remains very competitive. Add today’s technology (new turbos and stand alone ecu’s) and Rx7 can and do run with some of the big boy$ (Ferrari, Porsche, Vipers…) at a small fraction of the cost.

So RELATIVLEY speaking the car is about average (as far a sports car weight is concerned).

Akagis_white_comet 09-13-11 11:23 PM

If you want heavy, look at godzilla...the R35 GT-R.

It's a downright CHUNKY car, weighing in at 3800lbs AND that's with a strong, stiff chassis (like the FC has), and far more aluminum in any possible location to shed as much weight as possibly. The whole engine is pretty much aluminum aside from the obvious internal parts and stills weighs 608lbs as a complete longblock. Now compare that to a FC with a 20B-REW putting down the same 500hp under the hood. Need I remind you how the turbine housings and exhaust manifold are CAST IRON on it too? Or how the sideplates are also CAST IRON? and us 20B guys have a big thick CAST IRON center plate...

Checkmate

incubuseva 09-14-11 01:31 AM

Old thread is old.

Also, FC isn't heavy.

SpeedOfLife 09-14-11 02:08 AM

Yes, old thread is old.


Originally Posted by Akagis_white_comet (Post 10785944)
If you want heavy, look at godzilla...the R35 GT-R.

It's a downright CHUNKY car, weighing in at 3800lbs AND that's with a strong, stiff chassis (like the FC has), and far more aluminum in any possible location to shed as much weight as possibly.

To be fair, it's also AWD, so while that alone adding probably a few hundred pounds it does have its advantages.

tlmitf 09-14-11 02:46 AM

You guys do realise we are talking about a 20+ year old car, right?
How may other 20 year old cars feel as tight and solid as the FC?

Compare the FC to today's sports cars and they are featherweight!
Hell, even compared to today's featherweight, they still arn't that heavy
Taken from the lotus wiki Weight - claimed 1,987 lb (901 kg)

Hmm, i know i would rather be driving the RX7 over the lotus (ignoring the rotary V piston debate here)
Does anyone know what the standard inclusions are for the lotus? I know they have a radio these days, but still dont get ABS, or a roof :lol: and in the wet they try and kill the driver by randomly reversing off corners ;) :P

tuscanidream 09-14-11 05:27 AM

What makes an FC so heavy?

Probably me using it as a storage unit for all my parts. I know others are guilty of this too!

Black Knight RX7 FC3S 09-14-11 09:18 AM


Originally Posted by tuscanidream (Post 10786156)
What makes an FC so heavy?

Probably me using it as a storage unit for all my parts. I know others are guilty of this too!

HA
thats why you have two. One as a storage unit for the other car!!

Tofuball 09-14-11 09:54 AM

Just because it is old doesn't mean it isn't a good thread or worth continuing :)

The weight on the 7 is also very low, and between the wheels, that is ideal (unless you want a "drift" car, but even then you can argue).

It is heavy compared to, say, my Geo Metro XFi, weighing in at under 1600lbs.

HoustonMS3 09-14-11 02:25 PM


Originally Posted by Tofuball (Post 10786328)
It is heavy compared to, say, my Geo Metro XFi, weighing in at under 1600lbs.

I can attest to this. A few friends and I picked up the rear end of one and put it on the adjacent side walk. The rear end was attached to the car still... the owner was perplexed...

kendark2light 09-14-11 11:43 PM

my truck tips the cat scales at 7300ish so my 7's light compared to my tank(93 k3500 ext cab long bed with two toolboxes and a big block) it's stripped out but i still feel safe in it unlike my friends tin can go cart he calls a honda lol

turboIIrotary 09-15-11 12:28 AM


Originally Posted by Ottoman (Post 7359579)
Our FC's ARE heavy

the GC WRX STi for example

is lighter than the FC AND FD... and it's a bloody awd 4 door saloon car!

My gc weighs close to 3k with me in it plus it's a coupe and non turbo my fd weighs in the 2600 range...


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