JDM H22 OBD1 vs OBD2

[CB7Nub]

Yes OBD1 is easier because of less sensor I'm guessing for a swap. But is there any other differences that I should know such as:

- Problems when swapping the motor in
- Upgrading the performance and getting more CEL's because of more sensors
- Ways of ECU tuning
- Compatible ECU's (will regular P13's and P28's etc work?)
- Anything else that could happen

Main reason I'm asking is because the Type S motor only comes in OBD2.

[4DRCB7ftw]

i beleive obd1 is more open based easier to tune compatible with most chips and can handle wat you throw at it obd2 has some restrictions? unless im mistaken i believe obd1 is a better choice thats why cb7s came with it

[EJX_Michael]

Yes OBD1 is easier because of less sensor I'm guessing for a swap. But is there any other differences that I should know such as:

- Problems when swapping the motor in
Same as a non-SH OBD1 H22
- Upgrading the performance and getting more CEL's because of more sensors
OBD2 is nearly the same, only difference is the injector plugs, distributor, and something else. As long as you replace these parts with there OBD1 counterparts, everything should plug in no problem with no CEL as long as you did everything right. Take a look in the swaps section and you will find nearly unlimited info about the H swap.
- Ways of ECU tuning
Same as any OBD1 ECU (chipped P06/P28 ect.)
- Compatible ECU's (will regular P13's and P28's etc work?)
Any OBD1 ECU will work as the wiring in the car is staying OBD1. P13 is the stock H22 ECU, P28 is a civic ECU that can be chipped and tuned for the H
- Anything else that could happen

Main reason I'm asking is because the Type S motor only comes in OBD2.
To be honest, you don't really need to spend the extra to get a Type S motor. Just get a regular ol' H22A and spend the money you saved on some upgrades like a cam and Skunk2 intake manifold. Those two with a good tune will probably get you pretty close to the Type S numbers.

i beleive obd1 is more open based easier to tune compatible with most chips and can handle wat you throw at it obd2 has some restrictions? unless im mistaken i believe obd1 is a better choice thats why cb7s came with it

CB7s are OBD1 because they were made before cars even started using OBD2 in '96.

[Gr1m]

I also had a question along the lines of this, so the difference between the 92-95 and 97-98 H22's is the OBDI/II part, right? Performance-wise, out of the box (or crate), they're the same motor?.....

[BLUBB2]

USDM H22a1 has 190 BHP...USDM has H22A4 has 200 BHP along with the JDM H22 as well.

[deevergote]

i beleive obd1 is more open based easier to tune compatible with most chips and can handle wat you throw at it obd2 has some restrictions? unless im mistaken i believe obd1 is a better choice thats why cb7s came with it

If you don't know what you're talking about, please don't waste our time with useless posts...





To add what hasn't been mentioned already in this thread:

The OBD2 H22As (well, 97 on, anyway) were open deck, whereas the OBD1 ones were closed deck.
The OBD2 H22As have larger crank journals.

[DariuszZ]

Wohooo. This thread is full of fail answers.

First of all,
1. When it comes to H22a's, Every H22a And H22a1 is OBDI. (When it comes to USDM and JDM im not sure about EDM). H22a's and 1's came from a 4th Gen Prelude that was produced from 92-96. Therefore any H22a/1 from 92-96 is OBDI. From 97-2001 when 5th gen prelude came out, it also got a "new" motor H22a4. This is pretty much this same motor (yes, most parts will fit h22a4 if they came from h22a1.) except they were OBDII.

Now, you're going to ask Whats the difference?
Well, OBD stands for On Board Diagnostic. You might think "Hey, that sounds like it has to do something with electrical!". Well, you're right. The only main difference that "we" (people who swap those engines into our accords) must look at are 3 parts:
- Distributor
- ECU
- Fuel Injectors (Not NECESSARY but recommended).

If you get h22a4 (assuming that it is a BASE model not Type S) all you really have to do is get a NEW distributor that came of from h22a or a1, P13 ECU (For a start if no high modification was done to a car) - and yes there is no need for tuning the ecu, and if you really want to make sure that your car runs well, 4 Fuel Injectors that, once again, came of h22a or a1 (These are 345cc OBD1 Peak/Hold Injectors).
Why doing this?
Well, if you hold the distributor from the h22a4 and h22a1 you will notice that they have different plugs. Also, the ecu that came from BB6(5th gen prelude) has different plugins and the plugs going into ecu won't fit.

Remember, this is the safest and (trust me) easiest way to get an H22a4 in our accords. It might sound scary, it might take more time, but its worth it. Why?

H22a and H22a1
4th Gen prelude, USDM and JDM - HP (NOT BHP, thats a different story) = 197
5th gen prelude, USDM and JDM (BASE MODEL) - HP (Not Bhp once again) = 197.

Wait.... these are this same numbers - Exactly. Theoretically h22a4 will be a "healthier" motor.


Note to yourself. YOU will NOT be able to put Type S motor + the Tranny that came with it because these guys have ATTS. Therefore unless you can modify your chassis and half-shafts, go for it. Im not sure either if you can use just the motor and a different tranny. I've only worked with base model.

Good luck and hope this helps.
I gotta go to work... Peace

[deevergote]

The 5th gen Prelude motor in Japan was still called H22A, though it was the same design as our H22A4.
Get your facts straight before you start calling other people's answers "fail".

[mtnbikaah]

also, i believe the 96 prelude was OBD-2.

[deevergote]

It was, yes.
I'm pretty sure the 96 H22A (H22Ax) would be the only OBD2 H22A to have a closed deck.

[DariuszZ]

The 5th gen Prelude motor in Japan was still called H22A, though it was the same design as our H22A4.
Get your facts straight before you start calling other people's answers "fail".

my bad.

But i dont think 4th gen prelude ever came in OBD2
Note sure and i cant refer.

[deevergote]

1996 was the last year for the 4th gen Prelude (as I posted just above you.) and it was indeed OBD2.

[DariuszZ]

yea, i knew they were produced in 96, but i thought honda stuck with obd1 till the end of 4th gen.
Oh well, thanks though.

[deevergote]

Nah, the OBD requirements weren't up to the manufacturers. They didn't have the 5th gen ready for production in 96, so they had to convert the 4th gen in the last year. There are OBD2 H23A1s, and I believe OBD2 F22A1s out there as well!

[DariuszZ]

Good stuff + good to know.
Im sure cb7NUB got his answer now haha.

Note:
When i said "fail answers" i wasnt referring to your post! When i started writing it, your post (the one before mine) wasnt even there yet!