Alrigh I'm looking at swapping an h22 in to me ek coupe. I can pick up a jdm h22 block for $400, has eagle rods, je pistons, just no oil pan. I'd pull the je's since I'm not boosting and don't want the lower compression.

So to convert the jdm block which is an obd1 to obd2, it is my understanding that I just need to swap out the oil pump for an obd2 one and put the tdc and crank sensor on there? And that should cover the block to be equivalent as obd2, correct?

So then for the head. Obviously since it is just the block I can just get an obd2 head and throw that on there. But if I were to get an obd1 head what do I all ened to do to convert it to obd2? My assumption would be ond2 intake manifold as well as dizzy. Is that all I'd have to do?

I have to go for emissions every year ot two, so I need this car to be able to pass. Thanks for the help.

 

Pretty sweet! An OBD2 H22 in an EK! Im sure you can use the OBD1 intake manifold. Just be sure to use (or not to use) an injector resistor. The 96 H22 was OBD2 and utilized a resistor as the 97 and up did not. What ECU do you plan to use?

 

Don't I have to wire in a resistor box no matter what? And I was thinking about usin an obd2a to obd1 harness and just getting phearable to chip a p28 for me so I've got a street tune for the h22, and when I have to go for emissions I can put the P5M in so that I don't have any cels and can pass.

 

You only need a resistor box for the appropriate injectors. So it depends what engine you get. 97 prelude and up do not use a resistor. Have you considered running a 96 H22 Prelude ECU? These ECUs dont support an immobilizer as the 97 and up preludes run an immobilizer.

 

Well it sounds like you are mixing heads and blocks. I think OBD1 and OBD2 Blocks and heads are different. The decks are opened and closed.

OBD2 injectors run without resistor box.

Keep it simple for your self.

If your car is obd1 keep the block obd1. If your obd2, keep it obd2.

You ek is obd2?

You want to put an obd1 block in it.

Get an obd1 head for it.

You will need obd2 dizzy, crank sensor for oil pump, obd2 injectors.

 

96 OBD2 used a resistor box

No difference in the head.

 

But the blocks are different. Correct. Open and closed. As far as I know.

As stated above about the 97 preludes having no resistors, thats what Im basing my response on.

96 preludes run on something other than p13? Correct.

 

Alright well my car is obd2a (97), so if I run the jdm obd1 block, convert the bottom end to obd2 with the crank sensor and oil pump; convert head with obd2 dizzy, and injectors. So at that point if I put the obd2 ecu in, I should not get any cel's and be able to pass emissions at the obd2 standards? Because besides when I have to pass emissions, like I said, I'd run a chipped obd1 p28.

 

Sounds good. But... 97 and up Preludes ECU use an immobilizer, It would be next to impossible to start the car without all the immobilizers support devices in place. The 96 H22 Prelude is the only USDM OBD2 H22 that is not immobilizer equipped. You could use your EK harness and graft modifications to fit the H22 and wire it in like the factory would. Also, some states run the emissions tests through the ECUs DLC. But they dont just check for codes. The ECU is required to run a series of on-board tests. These are called readiness tests. Sometimes you have to drive the car several miles in order for the ECU to complete and pass the tests. In addition, some emissions stations actually pull the VIN number out of the ECU. So this whole endeavor may not be possible. Check out your local emissions laws to see if you can actually build an emissions compliant H22 EK.

 

Yes. Correct. but he should be OK as long as he uses the right combination of parts. Hell have to do some homework though.

 

Well I'm in WI so for our emissions they just plug in to your ecu. I just pull it up they plug in, and I'm done in 5 minutes.

 

i dont know about ur emmision laws, but to make it pass for an obd 2 you will have to stamp a "4" onto the block to make it look legit I.E. H22A4 that is the correct stamping for an obd2 h. in cali they check that. also yes u will have to run oil pump, dizzy from an obd2 car. the injectors can be obd 1, if u get a jdm block u can just wire in resistors in your factory harness for the jdm injectors. get a 96 ecu so you dont have to deal with the immoblizer bs- to pass smog- and runa chipped whatever fro fun. hope that helps.

 

Yea thanks, we have no inspection stuff here. It is just that they plug it in and done.

 

Why change oil pumps to 0bd2 if your going to run a obd1 p28 which does not used the crank fluctuation senson????? Only the newer 0bd2 ECU's need that censor to avoid a CEL.

 

Nevermind LOL, I just read that last post!!! Emission sucks ****!!!!!

 

in cali smart smog techs will loook for the wire... i know we r tough on smog here so i just base all my **** off that.

 

Hahaha yeah I jumped the gun a little right there!