Hi there peepz.

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.

 

the h23a block has short rods and longer stroke. and it has the same head as the h22a. persoanlly i think the gains you will see from the extra 100cc wont be really all that exciting.
as far as teh tranny i am pretty sure the euro-r tranny has teh normal 4.266:1 final drive. to get a 4.4 or something i would say you need to see about ordering a custom ring and pinion gear setup.

 

thanks,,

yea the h23a has the same head as the JDM Accord SIR 180hp auto head,

but I'm only using the block, basically just gona use the block and replace the h23a pistons with my euro r h22a7 higher compression pistons.
Has no one done this before in H-T? I heard mixed reactiopns some say it's only 100CC some say, that extra CC to 2.3L makes a huge diff like b18 to b20, so yea.

Yea I guess I have to get a custom final drive ring, and yup the euro-r's are 4.266.
once you have driven some jdm dc2r's or like my friends ek9 which is at 4.7 it really makes 4.2 look like shiet, it's like cruiging at 60mph in 5th gear, then drop to 4th and it's in vtec zone.