Hi there peepz. posted this in the Accord H-T section and didn't really get jack Sh*t info, so thought you prelude boys might be a bit more smarter but anyways.

I drive a JDM Accord SiR-T with full Euro-R conversion brakes, hubs etc and of course the whole h22a7 220hp euro-R engine/tranny conversion.
Currently with i/h/e I'm doing contant 14.3@156km/h passes with street tyres and 2500rpm traffic light launches.
For my quest to have a 13sec accord (which can be done if i take out my amps and passenger side seat and use slicks + launch harder) with near stock internals.
I'm getting my hands on a cheap yr 00' H23a blue top 200hp motor

now just wondering, from what I searched off H-T both the h23a dohc vtec block and h22a7 euro-r block have the same sized pistons/bore. So i'm guessing only the rods are bit longer being only 100cc more and plus the block should be basically the same. Reason I chose the blue top h23a is because of it being dohc vtec and so pretty sure the crank and rods can handle revs up to 8000rpm since the normal h23a blue tops can rev to 7200easy.

So just wondering if anyone in here has done anything similar?..H23a block on a h22 head? just wondering if it's worth it.
My plan is to take the h23 block off and put my h22a7 euro-r pistons to replace the h23's since they're proabbly not better and have a lower compression ratio of 10.6 rather then the 11.0 on the h22a7 pistons. and then yea new seals whatever and bolt it on and get my beautiful torque.

So, experience motorheads, you guys think it's worth a go?

and also one last question, where the heck can I find final drive ratio gears for h22 tranny? main reason is also coz compare the h22a7 tranny to any ek9 or dc2r, you'd find that the 96 spec dc2r's have a final drive of 4.4 and the 98 spec 4.7 thus why they are so much faster down the staright being that every gear is in the sweet spots.
The h22a7's are at 4.2 which makes it the closes ratio in the h22a family, but yea, I want to change it to a 4.4 at least to get faster times all round..track or drag.
My trap speed is just a tiny bit slower then the jdm dc2r's so that proves having a close final gear ratio will make a huge contribution to your overall speed.

So yea any idea where I can source them from would be great!

cheers guys.

 

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

now just wondering, from what I searched off H-T both the h23a dohc vtec block and h22a7 euro-r block have the same sized pistons/bore. So i'm guessing only the rods are bit longer being only 100cc more and plus the block should be basically the same. Reason I chose the blue top h23a is because of it being dohc vtec and so pretty sure the crank and rods can handle revs up to 8000rpm since the normal h23a blue tops can rev to 7200easy.

So just wondering if anyone in here has done anything similar?..H23a block on a h22 head? just wondering if it's worth it.
My plan is to take the h23 block off and put my h22a7 euro-r pistons to replace the h23's since they're proabbly not better and have a lower compression ratio of 10.6 rather then the 11.0 on the h22a7 pistons. and then yea new seals whatever and bolt it on and get my beautiful torque.

So, experience motorheads, you guys think it's worth a go?

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You are correct about the blocks being the same size bore... But the rods are not longer, they are actually shorter, but the h23 uses a different crank with a larger stroke giving it the extra 100cc... The h23 crank gives you a worse rod/stroke ratio that the h22, making the h23 not so rev happy... But, the H23a that you are getting a hold of might possibly have 55mm crank mains which could theoretically handle the revs better... I would do like you said and put the euro-r pistons in the h23a block and maybe use the euro-r cams if they are bigger....

 

pardon my stupidity but what and or where did the "h23a blue top dohc vtec" come out of? i have never herd of it.

 

sam, yup the h23a dohc vtec engine would nmaybe have the 55mm crank, this block was used in a dohc vtec 200hp JDM Accord wagon only made between 98'-02'. The head used with this h23a block is acctually the JDM Accord SiR 180hp auto F20B head. this h23a redline at 7200rpm and I think power peaks not far away from that too, so I don't see how this h23a dohc vtec block can't handle revs eh, specially when it was made for a dohc vtec 200hp head.

my Euro-R h22a7 revs to around 7600ish anyways, so yea thus why I don't see it not being able to handle revs, infact i can see the gains higher then say a b18 to a b20 crv block, it's basically a high revving 2.3L pure dohc vtec combination.

and yup I will use my h22a7 euro-r head and pistons to bump up compression, But I am really thinking of boreing it to 2.4L but meh I'll keep it safe.
So yup will be running 11.0 compression euro-r pistons with the h23a block, but no one in H-T has done it before? I just hope it does make the difference, at least with the torque.

vtecludeh22, h23a 200hp dohc vtec engine came out of the JDM 98'-02' Accord Wagon auto. my uncle is a agent in japan working in auction sites, and i'm a japanese car importer here in new zealand, so i've seen a few already thus why it popped into my head to couple it with my euro-r engine.

 

waste of time. The euro-r is a much better motor than the H23a. For the amount of work you will do, ll you will get is .1 more displacement and a lower redline, lower toruqe peak... blah blah..it's not worth it. The money better spent on cams and other engine work. You can't bore FRM blocks out further than .5mm or you must resleeve.

All H Series final drives are 4.266 you will have to purchase a 4.714 prodrive FD to get anything better.


What I'm getting at is that it's a lot of work for not much benefit. Euro-R is a great motor.

 

the h23 block isn't FRM, they are the normal steel sleeves as in other honda blocks. also, the h23 has much more potential for torque than the h22 due to the larger stroke and bigger crank. if bored to 2.4l, the possiblity of having even more torque than hp is there. This is actually a project I'm starting soon and i'll let everyone know how it goes. also, if you ever plan to run boost, the h23 block is better to go with in the long run.

 

Thanks for the info, I did a long search and I was reading posts made by you years ago regarding this conversion.

yea I am getting mixed reaction about this matter, argh, reason why I rtaher not work on the head now is that anything more aggressive then my euro-r cams, my ecu won't be able to handle.
and If i do change to a h23a block with euro-r 11.0 comp pistons, i might have trouble runnign them with my euro-r head, since the stroke is a bit longer too.

I think i'll have to change the final drive ratio then, it'll be the biggest help.
4.7 you say?..whoa..prodrive. got that.

You're right, the Euro-R h22a is a great engine,
with i/h/e i achieved 150kw at the wheels on heavy *** 17's.
now i'm stripped, took all the tv and dvd players out and put some 16" regamster evo's on and my 1/4 mile time is just amazing for such a big car.

Jnet, i'm staying all motor, just really want to be unique and have a 2.3L dohc vtec heh. I would love to know how it goes if you are doing the same thing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jnet &raquo;</TD></TR><TR><TD CLASS="quote">the h23 block isn't FRM, they are the normal steel sleeves as in other honda blocks. also, the h23 has much more potential for torque than the h22 due to the larger stroke and bigger crank. if bored to 2.4l, the possiblity of having even more torque than hp is there. This is actually a project I'm starting soon and i'll let everyone know how it goes. also, if you ever plan to run boost, the h23 block is better to go with in the long run.</TD></TR></TABLE>

are you smoking crack? The H23 block is FRM.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TakeiTeg &raquo;</TD></TR><TR><TD CLASS="quote">yea I am getting mixed reaction about this matter, argh, reason why I rtaher not work on the head now is that anything more aggressive then my euro-r cams, my ecu won't be able to handle. </TD></TR></TABLE>

let me get this straight....you're ready to swap your entire block and go through all this trouble, but you won't change your cams because you think your ecu can't handle it?

How will your ecu handle the higher compression from the increased displacement, and additional fuel needs of the 2,3L motor? Don't you think you might need some fuel management in that case?

I am lost as to why you would entertain getting a totally different block and all this trouble, yet won't spring for cams and hondata instead

 

I'm running on euro-r ecu now as well so it's already a ecu running 11.0 compression. I most likely of course would have to re-tune my v-afc2, and Somehow I wreckon my ecu + the v-afc2 would be enough to run the h23block with the higher compression h22a7 piston. Remember, my car is basically a accord euro-r.

The only reason why I am going through all this trouble is cause it costs 1/4 the amount of what I would have to spend on getting cams for the head (which i had jun stage 2R head package in my mind) I am getting a yr 2000 h23a dohc vtec engine for like $900us. and my mate is buying my left overs (h22a euro-r block with h23a lower compression pistons and the h23a head) for $600us. so thus at the end I'm nto spending much.

And of coz, before I go ahead with it, I just wanted to see if anyone has acctually done this and if there was acctually much gain to it.

Another reason is me having a obd2 loom, here in New zealand, hondata etc are only obd1 compatible, remember i'm not in the states, so a lot of ecu related things here are hard to come by. so basically If I was to modify my head, I would have to go through a lot of **** and spend heaps more but maybe with bigger gains but hey.

I do however have a buddy club spec A race computer n my garage waiting to be used so they should deal with the ecu.

But I guess my main reason would be the fact that all this trouble with the block I'm not acctually spending much at all. and I haven't seen anyone done it so i thought if it's worth a go, then why not, but I am still undecided.

 

I'm running on euro-r ecu now as well so it's already a ecu running 11.0 compression. I most likely of course would have to re-tune my v-afc2, and Somehow I wreckon my ecu + the v-afc2 would be enough to run the h23block with the higher compression h22a7 piston. Remember, my car is basically a accord euro-r.

The only reason why I am going through all this trouble is cause it costs 1/4 the amount of what I would have to spend on getting cams for the head (which i had jun stage 2R head package in my mind) I am getting a yr 2000 h23a dohc vtec engine for like $900us. and my mate is buying my left overs (h22a euro-r block with h23a lower compression pistons and the h23a head) for $600us. so thus at the end I'm nto spending much.

And of coz, before I go ahead with it, I just wanted to see if anyone has acctually done this and if there was acctually much gain to it.

Another reason is me having a obd2 loom, here in New zealand, hondata etc are only obd1 compatible, remember i'm not in the states, so a lot of ecu related things here are hard to come by. so basically If I was to modify my head, I would have to go through a lot of **** and spend heaps more but maybe with bigger gains but hey.

I do however have a buddy club spec A race computer n my garage waiting to be used so they should deal with the ecu.

But I guess my main reason would be the fact that all this trouble with the block I'm not acctually spending much at all. and I haven't seen anyone done it so i thought if it's worth a go, then why not, but I am still undecided.

 

if there was a reason to rebuild id say do it, but since your running good, i dont think it would be worth it.

900 is a SMOKING deal on that engine, but cams can be had cheaper. and its not optomial but the vafc can tune them.

where the hell were you 6 months ago when i was building my h23 vtec..can u get a h23a crank or whole engines? im also looking for a valve cover

 

there is no reason really apart from the fact i think my piston seals might not be perfect, when i'm downshifting and engine braking hard, it'll burn a little bit of engine oil here and there but that's it.

over here cams are rather expensive, more expensive the a whole h23a dihc vtec engine itself, right now at the local honda parts place, there is only 1x h23a whole engine avaiable which I am thinking of getting.

heh 6 months ago, I was taking parts off the crashed accord euro-r and putting them into my own car.

How is your h23a block working now?..what have you done to it?

 

Is there any way for you to get your hands on an Accord Euro R or an Accord Type R transmission? I have the JDM H23A right now, and I'd love to pair it with one of those

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TakeiTeg &raquo;</TD></TR><TR><TD CLASS="quote">
How is your h23a block working now?..what have you done to it?</TD></TR></TABLE>

its not, lol....first off its not a h23a , its a h23a1 which sucks cause its only got 50 mm mains, and a crappy crank compared to the h22. i will be assembling it in the next week or two. i need to go by the machine and see if they are done balancing it and cc'ing my head

 

JDM H23A..at the current moment there is none, but yes I could get my hands on the euro-r parts, but it'll have to be a whole car, usually a damaged ones, so yea I could get one but it'll take a lot of time and effort.

fastludeh22, you should get this h23a here then heh., goodluck with the setup thou, would be interesting.

I think i'm flagging this idea, most people has said the current engine I have is the best it can get, looks like I'll be working on the head.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TakeiTeg &raquo;</TD></TR><TR><TD CLASS="quote">fastludeh22, you should get this h23a here then heh., goodluck with the setup thou, would be interesting.

I think i'm flagging this idea, most people has said the current engine I have is the best it can get, looks like I'll be working on the head.</TD></TR></TABLE>


good ****, i agree...well get me a h23a crank...maybe a block. they are open deck? if so i an just use a 98+h22a4 block to save money...let me know...ill pick up this engine or crank anytime anyplace if the price is good.

 

from my local jdm honda wrecker,

the h23 thay have a is yr 2000' with 20000k's on it..whole block and head, no gearbox.

i think they're wanting round $1400 or 1500 u.s.d and i guess few hundy more for shipping.