ok so i have done tons of reading and have not had anyluck finding what all i need. Is there a difference in the intake manifold from 90-91 to the 92-93? only reason i ask is because it one is off obd0 and one is off 0bd1 and the obd1 has the egr on it and the obd0 doesnt. is there a power difference between the two?
What about the exhaust manifold between those years is there a difference there? from what i have learned the blocks are exact same 90-93 and the heads are exact same 90-93 and the intake cam on 92-93 might be a little better and other than that the obd1 computer is better i guess, thats what helps the 92-93 get ten more hp.

so if anyone knows anything about this, ur comments would be greatly appreciated.

 

the intake manifold thing you got going about the egr thing is not totally true. I only know this because i got refree ticket and the gave me **** for it not having the egr valve on a 90 integra. Anyways the headers from the 90-91 integra are 4-1 headers which are way smaller and power robbing then the 92-93 4-2-1 headers whick are alittle bit bigger. I also think the the exhaust piping is alittle bigger. But yea the heads are the same its just a cam difference from the 90 91 to 92 93 other than that thats pretty much it

 

I believe the o2 sensor location is different on the 90-91 compared to the 92-93s.

 

90-91 130hp
92-93 140hp
The 92-93 had shorter lift cams but longer duration, OBD1 computers, better exhuast manifold, and a cooler looking front bumper, lol. The cams and computer make up the extra 10 hp. 90-91s also came with EGR vlaves. The intake manifolds should be the same.

 

Pretty sure only automatics came with EGR valves. The "obd1" could be from an automatic where as the "obd0" is from a manual.

I've had one 90 and two 91's all manuals with no EGR's, the one 93 Integra I bought (as parts car) had an EGR and it was a automatic. My 90 DB1 had EGR, it was an automatic. I later converted that car to stick and dumped a bunch of money into it... blah blah blah.

Hope this helps.

 

ok so i got confirmation that egr only came on cars with automatics. and only the 92 on up tegs had obd1 and 91 on back had obd0. so now the question is distributors are they the same? or different? maybe different with the same electrical connectors? or do i have to use the dizzy that came off the obd1 with the obd1 harness?

 

the dizzys are different OBD0 90-91 OBD1 92-93 different connectors on dizzy are diffent from the OBD0 and the OBD1. and the harnesses are different too