non v-tech mani

[#1_M.I._CARLOS]

im gonna start the h23 manifold swap to my f22 engine soon so im searching thru the website to find some info but every thread had different things.

so im gonna clarify as much as i can so i can get some correct info on this swap and hopefully future members can get some info out of it too.

first off i have a F22A4 engine.
from what i read only non VTEC h23 manifolds follow the same bolt pattern as f22 manifold.

so i have a few questions
1 obviously the H23 DOHC manifold is out of the question as it is VTEC.
but every SOHC h23 Ive seen says VTEC too... so maybe what they mean is that only SOHC manifolds work? correct me if im wrong

2 so which h23 motor has the manifold i need for the swap?

3 do i need the plenum and TB too? and if i dont does it help the performance if i get them anyways?

if there is anyone that has this swap your help would be appreciated.
pictures would be appreciated too

[Jarrett]

There is no such thing as a SOHC H-series engine. You seem to be very confused on information that's pretty straightforward. You just need the entire intake manifold, throttle body and black box from a '92-'96 Honda Prelude Si with the H23A1. It's a DOHC non-VTEC 2.3L engine. You're right in that you can't use one from the DOHC VTEC H23A or the H22A (or DOHC F20B for that matter) because their manifold flanges have a different bolt pattern. Should you not be able to find the H23A1 manifold then you can hybridize a simar one. You can either get the entire manifold and black box from an F22A6 (smaller plenum volume) or you can just get the runners from the F22A6 and the plenum from an OBD-1 H22A. The DIY can help you with the rest.

[deevergote]

VTEC. Not V-Tech, not V-TEC. VTEC.

What you want is a manifold from an H23A1. It is the ONLY H23 found in USDM Preludes, and they are ALL non-VTEC. The H23A (no number = JDM) is VTEC, and is found in JDM Accords. You don't want that manifold, as the head on that engine is essentially the same as the H22A.

I'd love to see one of those SOHC H23s you've seen... because they don't exist.

[#1_M.I._CARLOS]

There is no such thing as a SOHC H-series engine. You seem to be very confused on information that's pretty straightforward. You just need the entire intake manifold, throttle body and black box from a '92-'96 Honda Prelude Si with the H23A1. It's a DOHC non-VTEC 2.3L engine. You're right in that you can't use one from the DOHC VTEC H23A or the H22A (or DOHC F20B for that matter) because their manifold flanges have a different bolt pattern. Should you not be able to find the H23A1 manifold then you can hybridize a simar one. You can either get the entire manifold and black box from an F22A6 (smaller plenum volume) or you can just get the runners from the F22A6 and the plenum from an OBD-1 H22A. The DIY can help you with the rest.

ok that clears it up a little, thanks amigo
i had a SOHC f series confused with an h23 (again because the threads i read here are very confusing) but i went on another website that cleared it up for me.

VTEC. Not V-Tech, not V-TEC. VTEC.

What you want is a manifold from an H23A1. It is the ONLY H23 found in USDM Preludes, and they are ALL non-VTEC. The H23A (no number = JDM) is VTEC, and is found in JDM Accords. You don't want that manifold, as the head on that engine is essentially the same as the H22A.

I'd love to see one of those SOHC H23s you've seen... because they don't exist.

got it

[#1_M.I._CARLOS]

and thanks to DjM_coupe that sent me a message with more detailed info.

[DjM_coupe]

No problem...lemme know how it goes for ya

[deevergote]

What exactly did you find confusing in the other threads? I have never done this swap myself, but I understand it quite well based solely on the information I've read here on this site. The same information you have read. If it is unclear, please let me know what you read and why you had difficulty understanding it, so we can make an effort to make it easier to understand.

[JHiratzka]

ok along these same lines, if one can use an H23A1 (or whatever number it is) intake manifold on the F22A1, could one use some ITB's designed for an H23A1? forget all the issues with ITB's, would they bolt up?

[Jarrett]

Yes.

[JHiratzka]

Yes.

thank you

[#1_M.I._CARLOS]

My confusion was based on a thread I read a while back saying that the h23 i/m needed for the swap was found on the 5th gen accord sohc engine, after that another thread further confused me showing a sohc vtec engine and calling it h23.

as much as I hate making threads that keep asking the same thing I decided to stop looking for info and just ask the people that know.

but now I know right lol

[deevergote]

If you can find that thread again, please send me a link. That information is so incredibly incorrect that it should be removed from this site ASAP.