Hey, I was wondering if anyone knew the sizes in MM of the H23 and the H22 TB's. I believe they are the same but am not sure.

I forgot what my h22 TB measured but I believe the h23 one I have laying around measured 62mm and I think the h22 is the same.

 

I think your off on your measurements.

I just measured a H23 tb and its like 58mm. H22 Im not going to measure here. but I know that its bigger

 

h22's are 60mm

ITR, ATR, S2K ect are 62mm

 

All the H23 TB's I've measured are 60mm. You have ot be careful of the step that's at the back when using calipers.

Pirate

 

So if h22TB are 60mm and h23tb are 60mm they're the same then right? I always thought an h22 TB was 62mm... How do you tell if you have a h23 or h22 TB?

 

The tb on my h23 and h22a are exactly the same size.

 

How are the TBs sizr measured? Is it only the opening, or is it the opening plus the TB walls.

 

Does anyone know what the differences are between them? Honda shows different part numbers for the two.

 

I don't know specific differences but I do know that they are interchangeable. I've had B20, H22 and H23 TB on my "H23". The differences are negligable.

Pirate

 

Ive noticed better throttal response with the H22 TB on a H22. Vs the H23TB on the H22.

I have both of them. Ill take actual measurements later on the 2, but Im pretty sure the H23 is smaller.

 

You're imagining it. There's virtually no appreciable difference between the two.

 

I know when I swapped to an H22 in my car, the outer TB opening on the H23 TB was noticably bigger, the intake from my car just rattled around when the H22 TB was on, wouldn't get close to tight on the TB, then the H23, fit right, and I measured a good size change, aka the H23 TB was larger at the intake flange, although I don't know if there was any butterfly size difference.

Also, my engine was a JDM auto H22A, so maybe it was just the auto had a smaller opening?

 

Yeah, I forgot to measure them today. All though I did a side by side comparrison and the H23 TB where it goes to the intake was larger.

Since I dont know where exactly to measure Im going to just measure the Butterfly valve thing.

If this thread is still on the front page when I do it, Ill post the results

 

You're suppose to measure the mouth part (the front where the intake attaches). Take a measurer of your choice and measure the opening..

I got 62mm out of both of em using a ghetto tape measure lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelude_93vtec &raquo;</TD></TR><TR><TD CLASS="quote">You're suppose to measure the mouth part (the front where the intake attaches). Take a measurer of your choice and measure the opening..

I got 62mm out of both of em using a ghetto tape measure lol</TD></TR></TABLE>

Wrong. TB's have a tapper, so naturally you would measure the area with the smalled diameter, in order to get the size of the TB.

I just measured my H22A TB with a tape measure and it was about 2 3/8" or 60.3mm

 

So are they the same H23 and H22 TB?

 

Measure the back of your h23 one and find out. I'm kinda curious to.

 

You guys arent going to believe me when I say that the H23 Tb is bigger than the H22.

It came as quiet a surprise to me as well. I just removed the Butterfly plate from both them and measured. And here are my results

H22a Tb from Hmotors online TB= 2 1/8"

H23a1 Tb from Unknown TB= 2 5/16"

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Acidcrakker &raquo;</TD></TR><TR><TD CLASS="quote">You guys arent going to believe me when I say that the H23 Tb is bigger than the H22.
</TD></TR></TABLE>

I don't believe you. I've had my calipers on both and I am disinclined to believe anything I read online when I've seen something to the contrary with my own eyes.

Otherwise let it drop. Both the H22 and H23 are crap to the new 4-bangers out there. 2-4 mm on a POS throttle body isn't going to make up for being down 60 whp.

2¢

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Acidcrakker &raquo;</TD></TR><TR><TD CLASS="quote">You guys arent going to believe me when I say that the H23 Tb is bigger than the H22.

It came as quiet a surprise to me as well. I just removed the Butterfly plate from both them and measured. And here are my results

H22a Tb from Hmotors online TB= 2 1/8"

H23a1 Tb from Unknown TB= 2 5/16"</TD></TR></TABLE>
There's a possibility the tb on your h23 came from a different souce and not the original tb. FWIW, the oem h22 and h23 tb on the 4th gen use the same tb gasket and the motors use the same intake plenum.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JT &raquo;</TD></TR><TR><TD CLASS="quote">
There's a possibility the tb on your h23 came from a different souce and not the original tb. FWIW, the oem h22 and h23 tb on the 4th gen use the same tb gasket and the motors use the same intake plenum.</TD></TR></TABLE>

Nope I got the whole IM off a dude on preludepower.com for a good price, and I know that it is the original IM. And I know that the H22 IM is from Hmotors. Both have resonable back grounds and there is no reason to think other wise.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PirateMcFred &raquo;</TD></TR><TR><TD CLASS="quote">

I don't believe you. I've had my calipers on both and I am disinclined to believe anything I read online when I've seen something to the contrary with my own eyes.

Otherwise let it drop. Both the H22 and H23 are crap to the new 4-bangers out there. 2-4 mm on a POS throttle body isn't going to make up for being down 60 whp.

2¢</TD></TR></TABLE>

Then dont believe, I dont really care. I find it hard to beileve that your sitting here calling the TB a POS now?? Thats just childish.

Here is the pictures I managed to take a little bit ago, just so you can SEE with your own eyes.

And please if you think I really have nothing better to do than sit around making **** up, please prove me wrong. Pull out your butterfly plates and look for all I care. Here are my findings when comparing the 2 TBs. Its pretty clear that no one on this board has ever compared the TBs together. Which is a little strange but like the above quoted poster said, its a couple MM big whoop. When then for the record here it is.

Start with this picture H23 on the Right and H22 on the Left




The above pictures show both Butterfly plates on the other TB. The H22 plate sits inside the H23 and the H23 Butterfly wont even go inside the H22.

Below is a side by side comparrisson, and unlike 3D art pictures the one on the left is the h23 and on the right is the h22. And yes the h22 is smaller.


Now for the ruler


Above is the H22 and yes that ruler is reading 2 and 1/8 inches and below is the H23 ruler and yes it does read 2 and 5/16.



These are the Manifolds that they cam off of. The numbers on each manifold are p13 but the other numbers are diffrent, and Im sure that if I go and measure the Plenniums they will be port matched as well.




At this point I forget which is which but Im pretty sure that the second picture is the H23 Plennum and 1st is the H22.

And that is about as technical as I feel like getting today, here are the FACTS in picture.

Do not forget that I am comaprring a JDM h22 TB to a USDM h23 tb


Modified by Acidcrakker at 6:07 PM 10/21/2008

 

Nice work Acid

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Acidcrakker &raquo;</TD></TR><TR><TD CLASS="quote">Here is the pictures I managed to take a little bit ago, just so you can SEE with your own eyes...</TD></TR></TABLE>

I still don't believe you. lol.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Acidcrakker &raquo;</TD></TR><TR><TD CLASS="quote">Then dont believe, I dont really care.</TD></TR></TABLE>

Clearly. haha I wish more people didn't care enough to take the time to post pics to prove something.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Acidcrakker &raquo;</TD></TR><TR><TD CLASS="quote">Above is the H22 and yes that ruler is reading 2 and 1/8 inches and below is the H23 ruler and yes it does read 2 and 5/16.
[img]https://i17.photobucket.com/albums/b88/Acidcrakker/DSC00132.jpg[/im]</TD></TR></TABLE>

Acid, Since I live in USDM I look at what's typically available. H22s and H23 in the US come with a 60mm TB. The upper plenum is the same on both. Whatever happens in JDM land has little documentation here and is not typical.

It looks like your H22 TB is very similar to the tiny TB found on F22s. Honda did some weird stuff on their Auto drivetrains including the auto B16As, F20Bs and apparently their H22s too.

I maintain that H22s and H23s with their relatively small TBs are still waaaay down on power nowadays. I also maintain that the TB is the least of the issues to address when building an H-series.

Now I need to go **** off some other people that will add useful content to the Prelude forums. I'm tired of the "Help! My junk's broke!" threads.

 

Eh, go back to your K series forum with your I-VTEC and your 62mm TB's

Ya I heard that the JDM TB's and USDM TB's are different. O well, I'll just measure them both when I get the h22 one out my car.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by snobordboi &raquo;</TD></TR><TR><TD CLASS="quote">I know when I swapped to an H22 in my car, the outer TB opening on the H23 TB was noticably bigger, the intake from my car just rattled around when the H22 TB was on, wouldn't get close to tight on the TB, then the H23, fit right, and I measured a good size change, aka the H23 TB was larger at the intake flange, although I don't know if there was any butterfly size difference.

Also, my engine was a JDM auto H22A, so maybe it was just the auto had a smaller opening?</TD></TR></TABLE>

mine was the same...my h22a longblock came off of an auto and the tb was smaller than my h23...i ended up using my h23 tb