I have a 90 crx dx, and a 91 crx dx. They both weight 2103 from the factory apparently. I read somewhere that in 90 and 91 models, the factory curb weight included the A/C system, which my 90 didn't have. If the car was suppose to weight 2103, with me weighing roughly 150, the car should have weighed 2250, BUT it only weighed 2200 flat, full tank of gas, SO whoever posted the 50 lb additional AC system was counted in the 90 and 91, was probably right.

My question is, I'm looking at getting a 88 or 89 HF, NOW, I know that from 88-89 the dx and SI both gained 120 lbs, and the 89 to 90 hf also gained about 120 lbs. Many think this is from use of the seatbelts mounted to the doors and some other stuff. NOW, supposedly the 90-91 doors weight 40 lbs a piece, so this is only 80 lbs, and you know that hf doors have to weight something, where did the other 40 bls come from? SO my question is, with the addition of door mounted seatbelts, did they have to beef up the chassis as well, not just the doors themselves? Is that the reason why the cars are heavier from 89-91 for dx and si, and 90-91 for the HF?

If you are completely gutting the a 91 DX and an 89 HF, without cutting out the flooring or doing any cutting, this includes, no interior, no sound deadening, no dash, no AC no heater, nothing under the dash, all bumpers gone, both cars with fiberglass front ends, both with lexan, both with solid rear axle setup, will there be any difference in the weight of the 91 dx and the 89 HF? Should I buy this 89 hf, or just stick with the 91 dx? I want the car as light as possible, and getting the car down to 1600lbs with me in it, would be a reduction of about 350 lbs from an HF, and about 600 lbs from a DX without the AC system. I know the HF motor weighs less, so lets jus say that both cars will have a crx si motor and tranny in them.

Stay with 91 dx, or get 88 or 89 hf?

 

89 hf is cool. I got one they are light. I ran 14.8 with an si motor. I don't think you could do that in a dx. There is tar on a hf. I have 88 si and 89 hf. The doors with seats belts mounted to them are extremely heavy compared to the other doors. I was struggling moving 91 dx doors across the yard but the 88-89 hf doors were way easier to move. I don't car what you guys say those doors are way heavy. My 93 civic coupe ex doors feel lighter then the 91 dx doors. I would go with hf. Get some dx spindles and your good to go. Their isnt much difference in spindle weight. But other parts of the body to make a huge difference. Also the rear bumper mount on the hf is lighter than dx/si.

DEF

 

BUMP

 

dont HFs use alum rear drums? some weight savings there.. header is a shorty not a full length. Sunroof. rear wiper/sprayer system.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crx_88_si &raquo;</TD></TR><TR><TD CLASS="quote">dont HFs use alum rear drums? some weight savings there.. header is a shorty not a full length. Sunroof. rear wiper/sprayer system. </TD></TR></TABLE>

Thats only the 1g hf that has alum drums.

 

dx's also didn't have sun roofs, so the difference from a dx and hf, can't be attributed to that. That is to say, they didn't have sun roofs when honda made their published curb weights. Cuz some of them do have sun roofs, or AC, or 2 mirrors, ECT. ECT.

What else guys?

Are the actual frames of the cars, and the unibody lighter in the 88 and 89 HF, then the DX and SI?

 

is there a difference on the fuel tanks, hf 88-89 and dx/si 88-89? are they interchangable? what's the gallon(capacity) difference, between the two?

 

I have heard that the fuel tank is smaller in the HF. Also, the HF is weighted without any of the options, including no side mirror, and no radio with speakers. The HF I went to see tonight, didn't have a radio, instead there was a black plate where the radio would be and it said honda on it. No rear wiper as well, though this car did have rear defrost.

DOES ANYBODY KNOW IF THE HF HAS A LIGHTER UNIBODY FRAME? Not the doors, but the actual BODY of the car?

Thanks!

 

no the unibody is the same.

 

and where did you come up with this information? Did you do personal work on an HF and a DX, and weighed the unibodies? OR are you guessing? Heard it from the grapevine?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Killa-X &raquo;</TD></TR><TR><TD CLASS="quote">and where did you come up with this information? Did you do personal work on an HF and a DX, and weighed the unibodies? OR are you guessing? Heard it from the grapevine?</TD></TR></TABLE>

Because you think honda is going to make three different unibodies for the Si, DX, and HF? No they won't its not productive.

So just throw on some lighter bumper supports, trim down the insides, thin out the door beams. Lighter wheels and such.

 

well if you did research kiddo, you would have read many posts that people say the roof skin on the HF is lighter, and the SI roof is more reinforced, even if you take out the sunroof. Now if the body is the same, but the roof skin is lighter, then that might be worth ....10 lbs or so...maybe, maybe not

But to answer your question, no I doubt honda made 3 different unibodies, BUT I bet they would have made one unibody lighter for better MPG, something with a high MPG, PERHAPS LIKE THE HF MODEL OR HIGH FUEL MODEL!!!!! Weirder things have been done, like using aluminum helicopter engines in a car that had headlights that turned when you turned the wheel. WHAT AUTO MANUFACTURER?

http://www.autoswalk.com/tuctormod48.html

For others reading this, somebody emailed me and said that the B pillar is more beefy in the 89-91 dx, si, and 90-91 HF, because of the door mounted seatbelts. He thinks that it is only a few pounds heavier however. This I would believe over somebody just giving a normal "honda tech" answer like....TRY THE SEARCH OPTION

I will post my 91 dx parts weights in a day or so. That way others me will have an idea of how much their **** weighs, and what to take out and what isn't worth taking out. Such as the front fenders only weigh 3.5 lbs a piece. Probably isn't worth getting those in carbon fiber or fiberglass just yet, but the whole front end...that might be worth it.

Any more HF guesses or truths?

 

the front bumper on the HF accounts for a near 30lb savings.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Killa-X &raquo;</TD></TR><TR><TD CLASS="quote">well if you did research kiddo</TD></TR></TABLE>

I'll see you in the parking lot after school.

I had some other information here but I deleted it because you were an ***.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wtsexton &raquo;</TD></TR><TR><TD CLASS="quote">

I'll see you in the parking lot after school.

I had some other information here but I deleted it because you were an ***.

</TD></TR></TABLE>
I put my lunch money down on wtsexton

 

lol, well if you want my lunch money, you'll have to beat up my friend Bubba first.

and if your other info was:
gut interior
take out sound deadening
replace rear hatch with lexan and fiberglass
no radio
take out door beams
take out wiper motor, reservoir
take out all heater control stuff
get rid of gas tank, get a fuel cell
trim down radiator support
replace steering column with billet aluminum
replace as many parts with billet aluminum
no bumper supports
carbon fiber hood
no side mirrors
lighter wheels
lighter brakes
lighter tires
no front sway bar
no header heat shield
gut cat
lighter exhaust
race battery
no brake booster
no headlights
trim out every non essential bracket and interior support bracket
take off undercoating

I heard about that stuff, and in the process of doing most of it. but thanks wtsexton, I guess I thought you were an ***, so I was an ***, it's the typical honda-tech way.

 

Aren't HF's like missing Support beams in the Front Bumper and the doors? I thought this, with the other little things (no rear wiper, no sunroof, etc) comprise the weight savings. I read that once somewhere...so take it with a grain of salt.

 

hfs rule go buy one. Then do just some basic weight reductions and youll be good.

DEF

 

For a car that you are going to keep for the street/strip, the HF is probably a good car, but after hearing personal emails and PM's from some people it sounds like there is only a minute difference in the actual chassis, and thus, if you're building a drag car with little or nothing in the car, and stripped down as much as possible, Either car will be fine. The hf might be lighter by a tad in the end cuz of stuff like the smaller brakes.

 

the 88's and 89 hf's have a different frame, hense you can't put 90-91 doors on a 88, the 88's piller is slightly wider, hope that helps

 

I don't have a hf but I have a 88std model now and I used to have a pig heavy 90 civic si. And I had to swap over all the parts from my si to my std model like b16, suspension, ect... And their are many differences between these two cars. I literally took the si apart to put everything in the std model. And some of the weights posted on HT are not that accurate about some of the weights of the EF's. I used to use the weight chart also until I weighed my car on corner weight scales. But yeah the HF is a great foundation to build upon if I had rex I would definitely get a hf.

 

I just read in more detail your post and you said your trying to get rid of 350 from a Hf, that is going to be very hard my friend. Considering you want it to be your street car so it has to be some what safe. That seems like a very hard goal to meet. Specially if you swap in b-series, but you might not. But anyway you approach its going to be difficult considering the hf doesn't have anything to begin with. Keep us posted on progress and outcome.

 

Well, currently I'm just building a drag car. Stripped down as much as possible, and not swaping in a b16, but boosting my crx si motor I bought with my friends t25 DSM turbo. BUT, i was wondering if even for building a drag car, you should start with the 88-89 hf or not. You made a good point that the doors can't be swapped, so perhaps wtsexton doesn't know what he's talking about at all.

Though the other reason why I was asking about the HF is because i will eventually be making a street car. I dunno if you guys follow the rules or not, but where i'm from, we dont' have smog tests, and nobody worries about "if lexan windows are street legal", and if the bumper supports are not there, (we don't plan on hitting something, and most likely it would be faster then the 5mph bumper spec). I am planning on Gutting as much of an HF as possible, but keeping the interior, dash, doors, ect. I want it to look like a normal crx, but just be as light as possible. I have a friend with a 90 DSM and it looks like a normal DSM, but he's taken out 300-400 lbs of stuff from it. Still full interior, full glass, no fiberglass. Anyways, good point about the doors not fitting, so the chassis must be at least slightly different.

 

glad i could help, i know what i said for a fact, cause i used to own a 89 hf w/ d16z6, and my roommate/bestfriend had a 89 si w/ stock moter and a nasty cam mine was way way way faster but his was way way way nicer, but someone brock into his car one night, broke the door window, then he went to a junk yard and they pulled a crx window for him, long story short it didn't fit his but fit mine great


Modified by 4g4drb17 at 6:56 PM 7/4/2004

 

i just cut my si roof off and put a dx roof on. the pillars are the same structually. if that helps your arguement