JUN Internals in a H22A
Thread Starter
Junior Member
Joined: Oct 2002
Posts: 206
Likes: 0
From: Melbourne, Australia
JUN internals in a H22A or H23A block?
Hi guys...
I was reading the H22 -> H23A VTEC thread in the Prelude forum... And it made me starting to wonder about my all motor project using JUN internals...
The bore and stroke are still remains at stock 87.0mm x 90.7mm
The JUN Stage 2 cams are have the same Valve lift to the Type S cams:
i.e Intake 12.2mm and Exhaust 11.2mm
http://www.junauto.co.jp/democ...ml?en
Bascially the H22A in the JUN Super Lemon runs a 12.3:1 Compression Ratio and uses the Euro R single Stage manifold to push out a staggering 269PS @ 7250RPM
H22A is 2156cc and i read somewhere the H23A is 2258cc
That makes it a 402cc difference... is that because of the H23A crank? or the block
of the H23A?
So to my understanding, if i drop the JUN internals into the H23A due to the higher rod ratio it should increase the CR as well compared to the H22A?
Btw what is the rod ratio of the H22A and the H23A? whats stopping me from using a H23A crank in a h22a block?
BTW forgot to mention using JUN Pistons
I was reading the H22 -> H23A VTEC thread in the Prelude forum... And it made me starting to wonder about my all motor project using JUN internals...
The bore and stroke are still remains at stock 87.0mm x 90.7mm
The JUN Stage 2 cams are have the same Valve lift to the Type S cams:
i.e Intake 12.2mm and Exhaust 11.2mm
http://www.junauto.co.jp/democ...ml?en
Bascially the H22A in the JUN Super Lemon runs a 12.3:1 Compression Ratio and uses the Euro R single Stage manifold to push out a staggering 269PS @ 7250RPM
H22A is 2156cc and i read somewhere the H23A is 2258cc
That makes it a 402cc difference... is that because of the H23A crank? or the block
of the H23A?
So to my understanding, if i drop the JUN internals into the H23A due to the higher rod ratio it should increase the CR as well compared to the H22A?
Btw what is the rod ratio of the H22A and the H23A? whats stopping me from using a H23A crank in a h22a block?
BTW forgot to mention using JUN Pistons
Honda-Tech Member
Joined: Aug 2002
Posts: 1,529
Likes: 0
From: Spokane, WA, USA
Re: JUN internals in a H22A or H23A block? (Ryu)
displacement difference comes from the longer stroke of the h23 crank, with whihc you must use a h23 rod. With these 2 parts, you can put the h23 internals in the h22 block since they are identical. Using h22 type s pistons will give you h23 displacement and 11.75:1 compression. Make sure to use arp rod bolts and have all parts balanced. A euro type r manifold will be a big help as well. Cams are up to you.
Thread
Thread Starter
Forum
Replies
Last Post
hondatech
Drag Racing
1
Oct 16, 2002 09:31 AM
