Lets put some you to the test. - Honda Prelude Forum

SikRedRX-8 · 11-11-2002, 06:04 PM

Here we go first I am doing the h23 vtec swap and have a few ? about the heads

1. Will a 95 H23 distribitor work with a H22 head any year? I know the 96 above use ODB II but everything is going to be ODB I so will it bolt up. Same part # for 92-95 si and vtec.

2. Is there any difference between the H22 head for any year? Are they all the same? They do have different part #'s but the # even changes between 97 and 2000 so is there any difference?

3. Does matter what injectors are used? they do have different part #'s.

4. Would you use the H23 head gasket or the H22 head gasket?

5. Is there a difference between the 95 and 96 up vtec intake manifold?

6. Is the throtle body the same for the 92-95 si and vtec.

Thanks for your help. I have done a lot of research and talked to a few people who have done the head swap and these are just the questions I would need a little more info on and just to verify a few things. Sorry for the long post.

red92si · 11-11-2002, 07:23 PM

1. Distributor is the same part... it just depends if you have a JDM engine, because they use an internal coil versus the USDM external coil.

2. The H22 heads are interchangeable. There may be difference in some internals, but there should no problem using any H22 head.

3. I am not sure the sizes of the injectors... I do know that the H23 injectors are larger than the 4th Gen H22 injectors though.

4. H22 Head Gasket. Since you modify the H23 block to fit the H22 head (instead of the other way around).

5. All H22 intake manifolds are the same.

6. Not sure...

SikRedRX-8 · 11-11-2002, 07:28 PM

Thanks for your help.

red92si · 11-11-2002, 08:05 PM

no prob whatsoever...

slp mode · 11-11-2002, 08:11 PM

I was pretty close eh sik?

Have you started it yet?

SikRedRX-8 · 11-11-2002, 08:19 PM

yeah pulled the old head off and started on the block rebuild looking for a damn head, emailed a few people. there is a few other parts trying to find as well. I got all winter cause I don't drive it anyway. I will take some pics of the swap.

93si4ws · 11-11-2002, 08:53 PM

2.2 injectors have a higher flow rate than that of the 2.3 and fitment of either injectors will work with either intake plenum.

v

Crate · 11-11-2002, 09:36 PM

just a side note, im using the jdm injectors w/ the h23 fuel rail. so thats interswappable.

Si4WS · 11-12-2002, 09:26 AM

I think the injectors are different. One set is peak and hold and the other set is saturated, I think . . .I'm not sure. Just guessing really.

I also found this by searching .

270cc for h23 310cc for h22

red92si · 11-12-2002, 09:31 AM

4th Gen = peak hold
5th Gen = saturated

SikRedRX-8 · 11-12-2002, 10:35 AM

Quote:

Originally posted by Si4WS
I think the injectors are different. One set is peak and hold and the other set is saturated, I think . . .I'm not sure. Just guessing really.

I also found this by searching .

270cc for h23 310cc for h22

Yeah I knew that about the injectors already but I was wondering how the 270cc would hold up to the H22 head? I am just going to use the 310cc injectors.

red92si · 11-12-2002, 10:36 AM

Quote:

Originally posted by sik96prelude
I was wondering how the 270cc would hold up to the H22 head? I am just going to use the 310cc injectors.

I would use the 310's just to be safe...

Satan_SRV · 11-12-2002, 11:02 AM

H23 are 240cc peak and hold i.e. resistor box
H22A1 are 310-345cc peak and hold i.e. resistor box
H22A4 are 290cc saturated

Think about the ecu you are using...match that to your injectors

Everything is else the same, head/IM/TB all of it...there may be slight valvetrain differences but its nothing significant

93si4ws · 11-13-2002, 12:14 AM

my jdms flowed to 355cc's by RC

v