I have a jdm h22 and was wondering what is the highest the motor could be bored out to. I have seen the one guy on here with 2.44 is that the max that the motor can be bored to? what is the cost for such a build up. I am looking to get close to 250 whp if possible or more safely and reliably. Any suggestions appreciated thanks. I really dont want to turbo either however I did consider SC but reliability and every day use is key

 

250 is setting a pretty high goal.Most of the fully built h22's are doing 215-230 whp.250 is possible but not good for daily driving due to the compression required to put down such numbers.89mm pistons are a popular choice i think someone on gere is running 90mm but thats pretty big.
As far as money goes thats going to be determined by how much you can do yourself.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Accordhspec &raquo;</TD></TR><TR><TD CLASS="quote">I have a jdm h22 and was wondering what is the highest the motor could be bored out to. I have seen the one guy on here with 2.44 is that the max that the motor can be bored to? what is the cost for such a build up. I am looking to get close to 250 whp if possible or more safely and reliably. Any suggestions appreciated thanks. I really dont want to turbo either however I did consider SC but reliability and every day use is key </TD></TR></TABLE>

An h22a cant get to 2.44L. That's 2point6, he has a 98mm welded crank to get that displacement. The H22a crank is 90.7mm and with an 89mm bore I am running 2258cc or so, same as the H23, 90mm would get you up to 2308, still 2.3

 

The H23 has a 95 mm stroke which would have you closer but not even to 2.400

 

https://honda-tech.com/zerothread?id=180883

good place to start

 

hey, what would a prelude with 215 whp N/A run 1/4? do u konw how much the 0-60 would improve?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Accordhspec &raquo;</TD></TR><TR><TD CLASS="quote">I have a jdm h22 and was wondering what is the highest the motor could be bored out to. I have seen the one guy on here with 2.44 is that the max that the motor can be bored to? what is the cost for such a build up. I am looking to get close to 250 whp if possible or more safely and reliably. Any suggestions appreciated thanks. I really dont want to turbo either however I did consider SC but reliability and every day use is key </TD></TR></TABLE> If you are looking for reliability but want a "stroker" engine, then I suggest duplicating my engine set-up. IF you are not totally interested in reliability (long engine life) then you can go even bigger than the 2.44ltr that I have by boring out the cylinders a bit more, but this will have tradeoffs.

 

according to my shop manual, it says you can only bore a h22a1 to .25mm or 0.010".. Same goes for h23a

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by solowerks &raquo;</TD></TR><TR><TD CLASS="quote">according to my shop manual, it says you can only bore a h22a1 to .25mm or 0.010".. Same goes for h23a</TD></TR></TABLE> That is correct... using factory sleeves and pistons.