Hope this isnt a repost but i found this site with the difference between 88-89 and 90-91. Thought it was pretty cool .heres the link .

http://www.crxsi.com/resources/diff_sec_gen.htm

Differences Between the 2nd generation CRX-es.

» 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.

» 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.

» 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.

» 88's have what Honda called "passive rear steering" which makes them slightly more agile but some owners complained that they didn't like the "twitchiness" feeling of it so it only existed the one year.

» Rear lower control arms changed between the 88 and 91 years and the rear shocks have different mounting points.

» 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.

» 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.

 

Repost.

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

FAQ > You.

 

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

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

FAQ &gt; You.</TD></TR></TABLE>

thought it was but still good stuff. FAQ&gt;Me haha

 

handy information though. i didnt know about the impact beams in the doors

 

nice

 

Sometimes you find some really neat stuff if you spend the time and check the FAQ. There's a 10 inch rotor brack upgrade that would cost about 250$ to do that most people over look because it's not JDM enough to check the FAQ.

 

i believe there is an error. i'm 99.9% sure only the 91 Si had the rear disc, not the 90 Si.

 

my 88 dx has the clutch safety switch . . . and the entire tail light assembly is a different size (at least in appearance) than my 90

 

90-91 si has rear disc, 88-89 si's didnt

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesrv &raquo;</TD></TR><TR><TD CLASS="quote">Sometimes you find some really neat stuff if you spend the time and check the FAQ. There's a 10 inch rotor brack upgrade that would cost about 250$ to do that most people over look because it's not JDM enough to check the FAQ.</TD></TR></TABLE>faq?

 

this is all covered in the fAQ at the top of the forum.

and THIS is the most incorrect thing.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">» 88's have what Honda called "passive rear steering" which makes them slightly more agile but some owners complained that they didn't like the "twitchiness" feeling of it so it only existed the one year.</TD></TR></TABLE>

 

I think they were reffering to the independant suspension, but I am not sure it is exclusive to that year.

 

theyre referring to the 88 having a slightly different rear toe link anchor position on the chassis, but its not true that 88's had passive rear steering and no other years did. all years civics and integras had passive rear steering, meaning the toe changes depending on wheel position.