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H23 Vtec swap

 
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Old 03-24-2011, 12:26 AM
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H23 Vtec swap

Hey guys im new to the forums, have owned a 94Prelude S for 3 years before it got stolen last year, then 3 months ago i purchased a 96Si with a H23 with over 200k, the engine is running pretty strong but i would like to do a swap with the h23Vtec blue top engine. My only questions are, since its pretty much the same engine, would a h23 vtec just be able to slide right in ? what about the ecu ? a p13 or something like that ? would i be able to keep my original h23 tranny ? heres a shot of my baby

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Old 03-24-2011, 02:46 AM
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Re: H23 Vtec swap

Yo, I'm doing the same swap, I'm pretty sure it slides right in, there might be a lil modding. I'm still trying to figure out what ecu and tranny to use with the H23 Vtec, but if i find out anything, I'll be sure to let you know. Would be nice if you did the same if you find out anything too. I'm keeping mine automatic, just a daily driver.
Nice Lude, btw.

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Old 03-25-2011, 06:18 PM
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Re: H23 Vtec swap

thnx brotha, i just got a AEM V2 Intake system and headers installed onto my car today, not only does it look good but it actually increased performance! i can feel acceleration has increased in from 3-5krpm, and it has a deep tone now when throtle is opened all the way. The guy who worked on my car at the shop said he could get me a H23Vtec for around 900. Just gota save up a few bucks now :) of course ill let ya know if i find anything out aswell.
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Old 03-25-2011, 06:23 PM
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Re: H23 Vtec swap

Both of your trannys will bolt up. As for the ecu use a phearable.net one. You will have to wire in vtec. As for the 96 si, yours is already obd2 so you will not have that much work. As for the other, you might have to do some swapping like injectors and dizzy.
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Old 03-25-2011, 06:25 PM
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Re: H23 Vtec swap

Oh and to op. Sorry to say but the header you just installed will not work for the h23 vtec. You will need to get an h22 header.
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Old 03-25-2011, 08:56 PM
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Re: H23 Vtec swap

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Originally Posted by brodie94 View Post
Oh and to op. Sorry to say but the header you just installed will not work for the h23 vtec. You will need to get an h22 header.
nooo wayyy! damit! there goes my 50 bucks i spent on my ebay headers lol
heres pics of the new intake and headers () installed
is anyone here familiar with how much a h23vtec engine runs around ?


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Old 03-26-2011, 04:54 PM
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Re: H23 Vtec swap

right around a grand. You can go either a p13 ecu or go to phearable.net like someone stated in the earlier post. If I was you I would go to hmotorsonline.com for the motor
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Old 03-26-2011, 08:37 PM
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Re: H23 Vtec swap

because ur car is 96 u need an obd2 p13 . which is hard to find i believe.
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Old 03-26-2011, 10:54 PM
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Re: H23 Vtec swap

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Originally Posted by jackp0t View Post
because ur car is 96 u need an obd2 p13 . which is hard to find i believe.
dam. i cant find an obd2 p13 ecu on ebay
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Old 03-26-2011, 11:22 PM
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Re: H23 Vtec swap

Quote:
Both of your trannys will bolt up. As for the ecu use a phearable.net one. You will have to wire in vtec. As for the 96 si, yours is already obd2 so you will not have that much work. As for the other, you might have to do some swapping like injectors and dizzy.
You may not have do any wiring for the VTEC. I know my 96 Si had the plug that goes to the VTEC solenoid in the factory harness. I think all bluetops were 97+ so you shouldn't have any problems in the OBD2/OBD1 area.

Quote:
because ur car is 96 u need an obd2 p13 . which is hard to find i believe.
Yeah, they are hard to find. I sold one on eBay a few months ago for a little over $250, so they're a little pricier than OBD1 P13's. Like said before, you might as well get a chipped ECU and get a tune, it won't be that much more expensive and you won't spend weeks/months looking for an OBD2 P13.
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Old 03-26-2011, 11:28 PM
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Re: H23 Vtec swap

yea sirr . also dont get deceive that h23a1 to h23vtec is cheaper to swap
bc u will need h22 parts to make the swap work.
really this swap is ideal for ppl who already got h22 motor.
but if money is not an object for you then nvm what i said.lol

btw this motor is awesome it has the torque of h23 and the power of h22.
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Old 03-27-2011, 06:28 PM
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Re: H23 Vtec swap

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Originally Posted by dbd6604 View Post
You may not have do any wiring for the VTEC. I know my 96 Si had the plug that goes to the VTEC solenoid in the factory harness. I think all bluetops were 97+ so you shouldn't have any problems in the OBD2/OBD1 area.



Yeah, they are hard to find. I sold one on eBay a few months ago for a little over $250, so they're a little pricier than OBD1 P13's. Like said before, you might as well get a chipped ECU and get a tune, it won't be that much more expensive and you won't spend weeks/months looking for an OBD2 P13.
so a chipped ecu would be easier to find than a obd2 p13 is what your saying ?
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Old 03-27-2011, 06:40 PM
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Re: H23 Vtec swap

Yes, that is what I'm saying.
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Old 03-28-2011, 04:37 PM
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Re: H23 Vtec swap

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Originally Posted by brodie94 View Post
Oh and to op. Sorry to say but the header you just installed will not work for the h23 vtec. You will need to get an h22 header.
You're saying any H22 vtec headders will work with the H23 Vtec "bluetop"?
Just curious, cause I'm doing this swap as well.
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Old 03-28-2011, 07:19 PM
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Re: H23 Vtec swap

Yes, that's correct, use an H22 header for the H23VTEC motor.
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Old 03-31-2011, 03:54 PM
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Re: H23 Vtec swap

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Originally Posted by dbd6604 View Post
Yes, that's correct, use an H22 header for the H23VTEC motor.
Alright, Sweet. I just talked with my mechanic. He said H22 Vtec Headers will work as well. Always good to have more than one opinion/answer. Also, he said a P28 chipped for vtec will do, they go for around $160. And I'm doing an h22 tranny "automatic" though. Those are my main concerns right now as of what to purchase. So if there's any other opinions, feel free to leave me some more advice. ;]

Thx,

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Old 03-31-2011, 05:27 PM
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Re: H23 Vtec swap

are u obd1 or obd2 bc thats a big factor in order to help u with answer
Quote:
Originally Posted by TheLudeDude View Post
Alright, Sweet. I just talked with my mechanic. He said H22 Vtec Headers will work as well. Always good to have more than one opinion/answer. Also, he said a P28 chipped for vtec will do, they go for around $160. And I'm doing an h22 tranny "automatic" though. Those are my main concerns right now as of what to purchase. So if there's any other opinions, feel free to leave me some more advice. ;]

Thx,

~TheLudeDude
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Old 04-10-2011, 12:04 AM
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Re: H23 Vtec swap

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Originally Posted by jackp0t View Post
are u obd1 or obd2 bc thats a big factor in order to help u with answer
Obd1. I'm running a p12 on my f22a1 engine right now.
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Old 04-10-2011, 12:26 AM
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Re: H23 Vtec swap

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Originally Posted by TheLudeDude View Post
Alright, Sweet. I just talked with my mechanic. He said H22 Vtec Headers will work as well. Always good to have more than one opinion/answer. Also, he said a P28 chipped for vtec will do, they go for around $160. And I'm doing an h22 tranny "automatic" though. Those are my main concerns right now as of what to purchase. So if there's any other opinions, feel free to leave me some more advice. ;]

Thx,

~TheLudeDude
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Originally Posted by TheLudeDude View Post
Obd1. I'm running a p12 on my f22a1 engine right now.
fairly the same as h23a1 to h23vtec . u just have to add a couple of more wires . likes the IAB and some other more im forgetting. but u said ur getting a chipped ecu so u will have the option to delete this things. I DONT KNOW if you can chipped an auto ecu havent seen one before so ur other option will b finding a auto obd2 jdm p13(i believe theres no usdm auto p13) which i think will be hard to find.
i think that will b ur main concern
the rest will be a piece of cake : )
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Old 04-10-2011, 03:46 PM
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Re: H23 Vtec swap

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Originally Posted by jackp0t View Post
fairly the same as h23a1 to h23vtec . u just have to add a couple of more wires . likes the IAB and some other more im forgetting. but u said ur getting a chipped ecu so u will have the option to delete this things. I DONT KNOW if you can chipped an auto ecu havent seen one before so ur other option will b finding a auto obd2 jdm p13(i believe theres no usdm auto p13) which i think will be hard to find.
i think that will b ur main concern
the rest will be a piece of cake : )

What about an auto chipped p28? I could buy a p28, then have someone chip it for automatic. Right? I don't see why you couldn't chip any ecu to be automatic.
My personal mechanic that's helping me with the swap says to go with a p28.
So I'm kinda leaning torwards p28, rather p13.
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Old 04-10-2011, 04:42 PM
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Re: H23 Vtec swap

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Originally Posted by TheLudeDude View Post
What about an auto chipped p28? I could buy a p28, then have someone chip it for automatic. Right? I don't see why you couldn't chip any ecu to be automatic.
My personal mechanic that's helping me with the swap says to go with a p28.
So I'm kinda leaning torwards p28, rather p13.
i havent seen one before thats y. i said i dont know.
but here qouted from xenocron website "Chipped ECUs come in manual trim by default. The options for Auto ECUs are limited and complicated. Please do proper research on the matter if you wish to pursue that avenue."

Xenocron Tuning: Chipped OBD1 VTEC ECU. #[P28-Equiv]
im guessing if u get one done u will be paying more for the auto ecu. (correct me if im wrong)
that link i gave u is only a p28 equivalent meanin its not the real p28 its just converted but works the same.

ps since ur going from f22toh23vtec u will need a couple of h22 parts. basically all the parts connected to the h23vtec HEAD u need obd1 h22 parts.
in reality the only part ur basically using with the h23vtec is the longblock. thats y i said before this swap is ideal for lude w/ a h22 already. i was lucky enough to get h22 parts for free

im guessing u will b spending more since ur getting a mechanic to do the work.
so just a heads up save extra flow bc u will need it

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Old 04-11-2011, 12:35 AM
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Re: H23 Vtec swap

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Originally Posted by jackp0t View Post
i havent seen one before thats y. i said i dont know.
but here qouted from xenocron website "Chipped ECUs come in manual trim by default. The options for Auto ECUs are limited and complicated. Please do proper research on the matter if you wish to pursue that avenue."

Xenocron Tuning: Chipped OBD1 VTEC ECU. #[P28-Equiv]
im guessing if u get one done u will be paying more for the auto ecu. (correct me if im wrong)
that link i gave u is only a p28 equivalent meanin its not the real p28 its just converted but works the same.

ps since ur going from f22toh23vtec u will need a couple of h22 parts. basically all the parts connected to the h23vtec HEAD u need obd1 h22 parts.
in reality the only part ur basically using with the h23vtec is the longblock. thats y i said before this swap is ideal for lude w/ a h22 already. i was lucky enough to get h22 parts for free

im guessing u will b spending more since ur getting a mechanic to do the work.
so just a heads up save extra flow bc u will need it

Me and the mechainc came to an agreement that he gets my old engine once we do the swap, he's not doing it, just teaching me basically. And I have the money, I have it stashed away in my room right now waiting to be turned into a nice new'ish engine. :]
I really just need to find the ecu, and I thank you a lot for the link, cause it seems as if that will do the trick. But idk how obd1 and obd2 work, cause i know that i have to get an h23 wire harness for the new engine, and idk if that will make it obd2 possibly? (I'm pretty sure obd1 is INTERNAL, and obd2 is EXTERNAL)? is it possible that i could get a h23 wire harness that won't fit my prelude (obd1)? :o I'm sorry, I don't understand the "phrases and terms". It comes to me as it's thrown my way though. I just wana make sure that the link to the ecu will work with the swap that I'm doing. If so, I'll probably buy it.

My plans are that I need an h22 distributor, h22 vtec headers with downpipe, h22 or h23 wire harnes (going h23"cheaper"), h22 tranny with the automatic computer for it, new belts, h23 powersteering pump with bracket.

That's all I have so far, is there anything else I'm missing? lolz. >.<
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2nd: (95 Prelude) F20b - SOLD
3rd: (99 Civic, what a mistake) D16y8 - SOLD
4th: (94 Prelude) H23a1 to ?????? - CURRENT
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Old 04-11-2011, 01:01 AM
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Re: H23 Vtec swap

"(I'm pretty sure obd1 is INTERNAL, and obd2 is EXTERNAL)"
im pretty lost with this ^^.lol
are u talkin about the coil?, jdm is internal usdm will b external.
y would u get a h23 harness when u can use ur f22 harness? by switching to h23 harness ur only gaining 2 wires(IAB,knock sensor[not sure]) u still need to wire the vtec
were as ur f22 harness u can just wire these 4 wire (iab, knock sensor , vtec , pressure switch).
u can use h23/h22 external od1 distributor , as for the ps pump mount if u use h23 u have to grind it to work, mine aswell get a h22 ps mount. 4th gen h22 downpipe, h22 ignition coil mount, obd1 h22 intake manifold , h22 injectors ,h23/h22 fuel rail , the h23vtec uses more teeth on the pulleys and it doesnt have a ps , so if u wanna keep ur ac , ps pump u need to get h22 pulleys, this is on top of my head. im prollie forgetting something
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Old 04-11-2011, 02:39 AM
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Re: H23 Vtec swap

Quote:
Originally Posted by jackp0t View Post
"(I'm pretty sure obd1 is INTERNAL, and obd2 is EXTERNAL)"
im pretty lost with this ^^.lol
are u talkin about the coil?, jdm is internal usdm will b external.
y would u get a h23 harness when u can use ur f22 harness? by switching to h23 harness ur only gaining 2 wires(IAB,knock sensor[not sure]) u still need to wire the vtec
were as ur f22 harness u can just wire these 4 wire (iab, knock sensor , vtec , pressure switch).
u can use h23/h22 external od1 distributor , as for the ps pump mount if u use h23 u have to grind it to work, mine aswell get a h22 ps mount. 4th gen h22 downpipe, h22 ignition coil mount, obd1 h22 intake manifold , h22 injectors ,h23/h22 fuel rail , the h23vtec uses more teeth on the pulleys and it doesnt have a ps , so if u wanna keep ur ac , ps pump u need to get h22 pulleys, this is on top of my head. im prollie forgetting something

Lol yeah, Idk what I was getting at. Just something my mechanic mentioned, and I didn't fully understand, probably.
I'll keep all that in mind, and visit this page again if I forget something.
Seems as if ordering all the right parts is more difficult than the actual swap. jeez. :p
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1st: (93 Prelude) F22a1 to H23a JDM Blue Top - STOLEN
2nd: (95 Prelude) F20b - SOLD
3rd: (99 Civic, what a mistake) D16y8 - SOLD
4th: (94 Prelude) H23a1 to ?????? - CURRENT
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Old 04-11-2011, 02:57 AM
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Re: H23 Vtec swap

Quote:
Originally Posted by TheLudeDude View Post
Lol yeah, Idk what I was getting at. Just something my mechanic mentioned, and I didn't fully understand, probably.
I'll keep all that in mind, and visit this page again if I forget something.
Seems as if ordering all the right parts is more difficult than the actual swap. jeez. :p
"Seems as if ordering all the right parts is more difficult than the actual swap. jeez"
EXACTLY.lol . im kinda worried with ur mechanic. seems like he knows how to swap but might not know the right parts to do it.
but if ur not sure bro. h22swap will be less headache since h22auto came in japan.
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Old 04-11-2011, 10:02 AM
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Re: H23 Vtec swap

Quote:
Originally Posted by jackp0t View Post
"Seems as if ordering all the right parts is more difficult than the actual swap. jeez"
EXACTLY.lol . im kinda worried with ur mechanic. seems like he knows how to swap but might not know the right parts to do it.
but if ur not sure bro. h22swap will be less headache since h22auto came in japan.
Well, I don't doubt my mechanic. It's probably just me that worries you, haha. He has a H23 bluetop that he's actually working on right now, and I'm pretty sure he'd know the parts, I just haven't gotten the best "list of things you need" from him yet.
My main concern is definitely the ECU right now though.
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1st: (93 Prelude) F22a1 to H23a JDM Blue Top - STOLEN
2nd: (95 Prelude) F20b - SOLD
3rd: (99 Civic, what a mistake) D16y8 - SOLD
4th: (94 Prelude) H23a1 to ?????? - CURRENT
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Old 04-22-2011, 12:51 AM
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Re: H23 Vtec swap

Okay, this is my progress/list so far. I'm buying everything I need for the engine before I get it, so I can put it all together without having to wait for parts, and waste warranty days.

Needed:

H23 DOHC VTEC Engine (JDM Engine Depot) - $899 + ship
H22 automatic Transmission (JDM Engine Depot) - $199 + ship
H22 automatic computer (JDM Engine Depot) (TCU) - $40 + ship
P28 automatic ECU chipped and tuned for H23 DOHC VTEC Engine - $150 Pick up
H22 VTEC Headers with Down Pipe and Gaskets - $80 shipped


----^^----$1,370 not including shipping or tax----^^----

H23 Belts - Pending
Rear 92-96 Prelude motor mount - $60 shipped
Freon UNKNOWN - Pending

--
(H23/H22 Distributor OBD1 "External" - $125 shipped ***BOUGHT CHEAPER***)
(Power Steering Pump with Bracket - ***BOUGHT***)
(H23 Wire Harness - ***BOUGHT***)
(Engine Oil, 5 & a half quarts (Buy 6 quarts of 10W-40) - ***BOUGHT***)
(Transmission Fluid (Honda ATF Fluid) 5quarts - ***BOUGHT***)
--

My Notes -
Paid $150 for:
h23 automatic Harness, h23 ps pump and bracket, h23 dizzy, compressor fan, black box under fuel injection for the "butterflies", all for $150 in almost new condition.

Got all this out of a prelude I saw at a slavage yard. Also has...
UNTOUCHED INTERIOR, Rear s3x blocker w/ leather hood, leather seats front and back, leather on door panels and back seat panels, and more...
SOOOOO going back for this. :D

Anyway, back on subject.. I'm wondering if the non-vtec H23 Power steering pump will work with the h23 vtec bluetop. And I'd also appreciate it if you added more to my list if I'm missing something.

Thank you,

~TheLudeDude
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1st: (93 Prelude) F22a1 to H23a JDM Blue Top - STOLEN
2nd: (95 Prelude) F20b - SOLD
3rd: (99 Civic, what a mistake) D16y8 - SOLD
4th: (94 Prelude) H23a1 to ?????? - CURRENT
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  #28 (permalink)  
Old 04-22-2011, 02:05 AM
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Re: H23 Vtec swap

when in doubt, i think you will be safe using anything off the h22 or seeing if the part numbers match
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