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88-91 USDM Crx Differences

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Re: 88-91 USDM Crx Differences

Postby suspendedhatch » Wed Jun 15, 2016 2:44 am

-88/89 CRX's don't have side impact beams in the doors, the 90-91 do.


Is this backward? My 88 Si has impact beams in the doors. I tried adding 90-91 Civic door lock actuators but the beams are in the way. They must not be there in the sedan or they're out of the way. I didn't take note of them when I pulled the actuators.
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Re: 88-91 USDM Crx Differences

Postby Baker » Wed Jul 27, 2016 12:46 pm

suspendedhatch wrote:
-88/89 CRX's don't have side impact beams in the doors, the 90-91 do.


Is this backward? My 88 Si has impact beams in the doors. I tried adding 90-91 Civic door lock actuators but the beams are in the way.


Everything I have ever read AND seen supports this, 90-91 had the side impact beams.
Sounds dumb, but are you certain your car is an '88/has the correct door?
Pictures?
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Re: 88-91 USDM Crx Differences

Postby Tesla220 » Thu Aug 04, 2016 11:30 am

Good post. Not to be picky but my 89 hf has a clock and a passenger outside rear view mirror. I bought it in 1995 from my friend who bought it new. Also as I read in other posts, yes the 89 Hf HAS Vented front Brake Rotors.
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Re: 88-91 USDM Crx Differences

Postby Baker » Thu Aug 04, 2016 12:17 pm

Tesla220 wrote:Not to be picky but my 89 hf has a clock and a passenger outside rear view mirror.


Those were optional add on's, they did not come standard on the HF.
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Re: 88-91 USDM Crx Differences

Postby bryancrx » Fri Aug 19, 2016 7:59 pm

Do you know how many 1990 y49 were produced?
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Re: 88-91 USDM Crx Differences

Postby Dave_Darling » Sat Aug 27, 2016 4:04 pm

Honda has never released production totals. :(

--DD
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Re: 88-91 USDM Crx Differences

Postby jfrolang » Sat Aug 27, 2016 10:15 pm

bryancrx wrote:Do you know how many 1990 y49 were produced?

The total for 1990 USDM Si was about 14k, according to this thread:
http://crxcommunity.com/viewtopic.php?t=165530

If you assume 10% of them were yellow (an absolute guess), fewer than 1500.
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Re: 88-91 USDM Crx Differences

Postby theinfamousw » Sun Mar 05, 2017 1:51 am

I'm surprised no one has mentioned the steering racks. DX and HF had a standard steering rack(same rack for both models) while the si had a variable gear rack that was much easier to turn, almost like having power steering. Also my 90 dx had the smaller gas tank, sure wasn't 11 gals, I ran it completely empty and it took all of 9.5 gals to fill it up on more than 1 occasion as a teen and yes it was a factory original car bought from the original owner
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Re: 88-91 USDM Crx Differences

Postby Dave_Darling » Sun Mar 05, 2017 11:35 pm

I do not believe the Si rack was variable. I'm not sure it was different from the others, in fact.

Gas tank sizes can be difficult to gauge. Even if you stall from not enough fuel, there can still be a significant amount of fuel in the tank. (Depending on the shape of the tank; not sure about ours.) And the gauge is not exactly super accurate, it can read well over the "F" mark when the tank is full. And relying on the gas station's automatic cut-off is not necessarily that accurate either.

--DD
"Mango Bango", 1990 CRX Si -- Sold on 10/01/11, with over 227,000 miles.

VTEC is Honda's "select a cam profile on the fly" system; VTECH is a crappy phone.
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Re: 88-91 USDM Crx Differences

Postby theinfamousw » Mon Mar 06, 2017 4:43 am

It's pretty well known the si had a variable rack, even has a VGR stamp on it and is a separate part # from the HF and DX which use the same rack, also why a quaife quick rack works with DX/ HF rack and not the si rack. I've driven all 3 models and owned Dx and si and there is most definitely a difference in the si, unless it had the rack replaced with a DX/HF rack. As for the gas tanks, I think someone screwed the pooch on the sizes as previously stated my DX would go from pushing into the gas station to overflowing in 9.5 gals, but my 91 si would take 10-10.5 not even getting to the bottom. I could be wrong on the tanks, but that's personal experience and not wikipedia
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Re: 88-91 USDM Crx Differences

Postby Dave_Darling » Fri Mar 10, 2017 7:25 pm

There was at least one 1990 Si that had a tank that you could get 13 gallons into. I don't have my spreadsheets on this computer, but there were several times that I managed to get 13 gallons into Mango Bango. And many more than I put 12+ in. And I am sure that I put rather more than 10 into Parts Fetcher (my previous 1990 Si) on many occasions as well. That's personal experience, not from Wikipedia. From 18 years of owning and driving CRXes.

It is possible that there was a variable rack in my cars, but if so it was subtle enough that I couldn't tell.

--DD
"Mango Bango", 1990 CRX Si -- Sold on 10/01/11, with over 227,000 miles.

VTEC is Honda's "select a cam profile on the fly" system; VTECH is a crappy phone.
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Re: 88-91 USDM Crx Differences

Postby jfrolang » Sat Mar 11, 2017 5:40 pm

The VGR steering rack on the Si is well known. I was also surprised to see it not mentioned here.

The fuel tank volumes listed match what was published in the service manuals.
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Re: 88-91 USDM Crx Differences

Postby Baker » Mon Mar 13, 2017 6:57 am

jfrolang wrote:The VGR steering rack on the Si is well known. I was also surprised to see it not mentioned here.


I'll have to update the thread, as I see many pics are not working either.
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Re: 88-91 USDM Crx Differences

Postby shortA25 » Tue Apr 04, 2017 4:27 pm

theinfamousw wrote:It's pretty well known the si had a variable rack, even has a VGR stamp on it and is a separate part # from the HF and DX which use the same rack, also why a quaife quick rack works with DX/ HF rack and not the si rack. I've driven all 3 models and owned Dx and si and there is most definitely a difference in the si, unless it had the rack replaced with a DX/HF rack. As for the gas tanks, I think someone screwed the pooch on the sizes as previously stated my DX would go from pushing into the gas station to overflowing in 9.5 gals, but my 91 si would take 10-10.5 not even getting to the bottom. I could be wrong on the tanks, but that's personal experience and not wikipedia


I knew there was a difference in the racks but did not know about the stamp. Where is it located or what does it say or look like? I have a couple racks that I've long forgotten what trim level they came out of so it would help to be able to identify them from the outside.
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Re: 88-91 USDM Crx Differences

Postby jfrolang » Wed Apr 05, 2017 3:45 pm

The Si racks say "VGR". It's in small letters cast into the housing. I think it's on the bottom. I can't find a pic so I'm just going from memory.
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Re: 88-91 USDM Crx Differences

Postby shortA25 » Tue Apr 25, 2017 7:59 pm

So out of curiosity and because I had one sitting around I took a look at an Si rack I have and it does have raised letters in the casting indicating VGR. See the pic below (pardon the cobwebs). I'll try to grab a pic of a non-si rack that I should have lying around for comparison.

Image
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Re: 88-91 USDM Crx Differences

Postby Fox » Mon May 29, 2017 1:12 pm

What about the wiring harness?
Are they the same throughout the trim levels?

For example, I owned a '92 Geo Metro XFI, the trim equivalent to the CRX HF. That car came with nothing, yet the wiring harness had all the plugs/connections for accessories only available on higher trims (rear defrost, A/C, hatch wiper motor, even the damn tach cluster found on Suzuki Swifts!).

So would my '89 DX be equipped for adding A/C, power windows/mirrors, etc?
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Re: 88-91 USDM Crx Differences

Postby theinfamousw » Fri Jun 02, 2017 5:01 am

Yes there are differences in the wiring harnesses between the models. dx isn't wired for multi point fuel injection, hf is wired for a reverse sensor and another point that causes an issue sometimes if you try to swap in a d16a6 and pm6. I'm not sure what all is different on the body harnesses but i do know the ICU is different for si and dx models. Some dx and hf models were never even wired for rear speakers. I'm sure there's others on here that can give more differences and examples.
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Re: 88-91 USDM Crx Differences

Postby msc » Fri Jun 02, 2017 11:44 am

In regards to second generation (88-91) USDM CRXs the only harness that are cross compatible are 90 and 91 for the same trim level. Beyond that each year and each trim has a unique set of wire harnesses. The only possible exception is 88 and 89 HF might be the same because the HF did not get the automatic seat belt system until 90. For the DX I'm pretty sure there are different harness for the manual and auto transmission versions.

The big difference between 88 and 89 is the addition of the automatic seat belt system. There are major differences in the cabin and dash harnesses but the engine and rear cabin sub harnesses may remain the same.

Moving from 89 to 90 there are many changes with connectors used and pin location on the connectors.

As far as I can tell the only way to tell a 90 from a 91 is the year code on the VIN. In all the parts look ups I have done for these years I have never found a single difference between the two years.

As far as adding things that were not original to the car not much is supported. If the car did not come with a radio or clock those connectors will be behind the delete plate. All CRXs left the factory without A/C but were set up to have an A/C kit with an A/C sub harness installed by the dealer. Power windows, door locks, and mirrors where never available on USDM CRXs so there is no wiring support for them.

theinfamousw wrote:i do know the ICU is different for si and dx models.

All second generation (88-91) USDM CRXs use the same ICU, Honda part number 38600-SH3-A11.

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Re: 88-91 USDM Crx Differences

Postby Baker » Tue Jun 06, 2017 9:06 am

Fox wrote:So would my '89 DX be equipped for adding A/C, power windows/mirrors, etc?


A/C, yes, power windows & mirrors, no.
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