ok firtst off the h22a are not good engine to use for a boosted setup as they are close deck design and under extreme duressthis can cause the cylinders to go out fo round and then possibly allow the sleeve to drop. also h22a's are not already sleeved they come facotry equiped with the ssame FRM sleeves the ha22a4's have. The h22a4 is the better of the engines to use for boost as not only is it an open deck block but also because the oil sneding mount can be directl used as an eltronic oil pressure guage feed. anyway man if you are truly interested in boostying oyu h22 the call this guy:
Laskey Racing, and discuss getting your sleevs done and blueprinting with Mike Laskey.
last but not least if the only amount of HP you are goin for is 250 then just quit right now. to turbo charge a prelude correctly is an enourmous job and the cost per horsepower is just unreal high. also the list i had written you may be called by some to much and overkill however as soon as you start to realize that by changin any parameters of your cars setup you will ahve to continue chaning things until they all become equivalent in output potential.
