I already used the search button but couldn't find an answer so please forgive me if this is already posted somewhere. I plan on buying an EF civic once my tax refund gets in and i was gonna get either a dx or si frame , my question is is there any reason that it is better to get an si frame over the dx. I plan to drag race, and dd this car. Is there any realy differance between the two , ive heard that the si weighs more so is there a reason that i should get the si over the dx? and i only really plan on doing a sir b16 swap with bolt ons and a set of lower springs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Diller &raquo;</TD></TR><TR><TD CLASS="quote"> I plan to drag race, and dd this car. ? and i only really plan on doing a sir b16 swap with bolt ons and a set of lower springs.</TD></TR></TABLE>


if that is all you are doing buy the car that you would like more or be more comfortable in. look into the differences between interiors. moonroof vs. no moonroof, etc.


if you are really interested in the differences between models, i think it's been covered in the FAQs.

 

I would check this out if you dont really know much about crx's. It pretty much explains all the differences between the models...example

88-89 CRX's don't have side impact beams in the doors, the 90-91 do.
All CRX's have rear drum brakes except the 90-91 Si's
90-91 have a round instrument gauge cover while the 88-89 one is more squarish
88-89 door moldings are taller and flatter, the 90-91 ones are shorter but stick out further and have a beveled edge to them.
90-91 rear lights have a 1/2 inch black edge all the way around them, the 88-89 do not.
90-91 have have fake air ducts molded into the bumper
88-89 have slightly different front and rear bumpers than the 90-91
90-91 bumper mounted turn signals are clear with amber inserts in them, the 88-89 lenses are just solid amber and shorter in length.
88-89 Corner mounted parking lights have their mounting screws visible while the 90-91 ones are attached by hiden screws.
91 and perhaps 90 headlights have a vent in them to help prevent moisture buildup.
90-91's are the heaviest, the 89 is lighter, and the 88 is the lightest. In each year the hf is the lighter model, then the DX and finally the Si weighs in at the most.
88 manual transmissions have an input shaft with 21 slpines
88 has a 21 spline input shaft, the 89-91's have a 20 spline shaft
90-91 clutch is 212mm, the 89 is 200mm and the 88 has either a 200 or 190mm, I can't remember which.
88 does not have a clutch safety switch. Which means it will start without having to press the clutch in.
88-89 Si models have 105hp, the 90-91's have 108hp due to different ecu settings and possibly a slightly different cam.
88's have pillar mounted seatbelts,90-91 have door mounted belts, 89 si's and dx's have door mounted belts, 89 hf's have pillar mounted belts. I could be wrong on some of this belt stuff, if you can confirm or deny any of it please let me know.
Models with door mounted belts have a wider pillar at the end of the door to accomodate the belt mount, this also means that the glass is and inch or so shorter.
90-91's have a red seatbelt warning light built into the dome light.
Rear lower control arms changed between the 88 and 91 years and the rear shocks have different mounting points but I'm not sure what year the change took place.
88 has slightly different sized front shocks.
88 ecu has a different internal design than the 89-91 but the inputs and outputs are the same and ecu's can be swapped between years. I know this one since most chip makers don't offer a chip for the 88 and my car was a gunea pig for Dinan to test a later year ECU on.
88-89's have the hazard light switch on the top of the steering column, 90-91's have it mounted on the dash.
88-89 Si seats have a white pinstrip, 90-91 Si seats have a red pinstrip.
88 has a pocket at the bottom of the drivers door
90-91 Si's and perhaps the 89 Si have a mesh pocket on the back of the seats.
88 cam indexing is the same for all the engines, 89-91 si's have indexing that is different from the other engines.
90-91 and possibly the 89 have larger reverse lights that are set further to the sides than the 88
Weight Differences By CRXBart:

1988 CRX HF 1819lbs.
1988 CRX DX 1922lbs.
1988 CRX Si 2011lbs.

1989 CRX HF 1834lbs.
1989 CRX DX 2048lbs.
1989 CRX Si 2138lbs.

1990 CRX HF 1967lbs.
1990 CRX DX 2103lbs.
1990 CRX Si 2174lbs.

1991 CRX HF 1967lbs.
1991 CRX DX 2103lbs.
1991 CRX Si 2174lbs

Copied from- https://honda-tech.com/zerothread?id=650219

Hope this helps!

 

The one thing that makes the SI shell weigh more is the power sunroof. Remember that there is actually a false ceiling in the SI, which carries the track and motor for the sunroof. So weight is significant. Otherwise, when it comes to weight differences between the DX and SI, everything that makes the SI heavier can be swapped out for lighter stuff (or gotten rid of). So which CRX should you get? I personally would go for a DX or HF rather than an SI. Not to mention that you will probably have an easier time finding an HF or (especially) DX than an SI - especially one in good condition. I would only go for the SI if you feel that the sunroof is just something you can't live without.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StorminMatt &raquo;</TD></TR><TR><TD CLASS="quote"> Not to mention that you will probably have an easier time finding an HF or (especially) DX than an SI - especially one in good condition. </TD></TR></TABLE>


I can't find a clean 88 HF to save my life.

I love the sunroof and disc brakes on my 90 SI.

 

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


I can't find a clean 88 HF to save my life.

I love the sunroof and disc brakes on my 90 SI.

</TD></TR></TABLE>

Actually, that is probably true about a 1988 HF. EVERYBODY wants these because they are the lightest 2G CRX, and the lightest Honda that you can easily swap a B-series motor into (or even THINK about swapping an H or K-series motor into). But 1988 DXs are actually quite common. And they are also VERY light. Not quite as light as a 1988 HF. But, unlike the SIs, you can easily make them that light just by swapping stuff out. You might also be able to find a 1989 HF. Many people don't realize that they DON'T have door seatbelts, and are only 15 pounds heavier than a 1988 HF. Just keep in mind that the 1989 DX already has door seatbelts, and is therefore not light like the 1988 DX.

As for the sunroof, this is clearly a personal issue. But as I said, if a sunroof is nothing special to you, then it is probably best to not deal with the weight penalty.

 

seems like all of the HF's and DX's that i have found lately worth a turd all have a 'custom' sunroof.


i'm just gonna stick it out with the SI. at least when im done with the swap it'll have a decent amount of power that i wont have to worry about weight too much.

 

crx's dont have frames i personaly hate si's cause there is less head room ive only owned one si hatch and i sold it just for that reason my head would be touching the roof. but chicks dig the sun roof. and a hf is way harder to find then a si.

 

Thanks for all the help guys. Looks like for my plans im better off with the dx or hf frame and i'm better off without the sun roof my friends would try to get in and out of it that way