Originally Posted by ludeboom
i doubt the h23a1 with a h22a head is going to make 220 HP at the crank.
it ends up being about even with the h22a motor power wise. and the reason for that is obviously the wonderful h22 head.
honda sold this engine in the accord wagon in like 99-00 (i think?)
jdm only of course...went by the engine code h23a
it came with the blue valve cover stock.
the main reason i would not do this hybrid is because the h23a1 doesnt rev nearly as high as the h22a stock for stock...given...the h22a head changes that...but having blown the #2 CR bearing on my h23a1, and knowing of several other h23a1's that met the same fate...i would either buy a h22a longblock for dirt cheap and use your h23a1 tranny or buy the h23a outright, instead of putting a h22a head on your h23a1.
~boom
The H22 head does not change the revving capability of the H23 crank. That is rediculous. The only thing the H22 head does is it allows the engine to make power further up in the RPM band that the H23 head doesn't allow. That's all.
Doing this hybrid is A LOT more complicated than what it seems. It requires more than just the H22 head. You really need a whole H22 long block to have all the necessary parts. If you are starting out with an H23 longblock....you will need a lot more parts.
This is not a project for someone who does not know what they are doing. Too many people have suffered blown motors because they don't know the details about this process.
Also, after the motor is built...revving the motor past 7200 rpms is just asking for trouble because the H23 bottomend is not as well balanced as the H22 bottomend (mainly the crank and oil squirters)
Stick with the H22 and just mod that. Your car will be a lot more reliable, if that is a concern.
If you have the motor built correctly and are mature about it (not revving the shyt out of the motor) it will serve you well. Otherwise, you can expect a blown motor and A LOT of wasted $$ in the near future.
Hope this helps