I've heard that if you have a fully built head it will cause you to throw a rod or maybe other serious damages to the block. If anyone has any insight on this let me know. I'm considering buying the Crower stage 2 camshafts and the spring and retainer kit for my H23 with new stainless steel valves. Info will be greatly appreciated.

 

Cams alone are far away from a "built" head

 

Im not just puttin cams in. Please read.

 

Ok cams and valves.....really not much difference...if you want cheap gains get an H22

 

Well i've already considered that and decided against that so plz and info towards the MAIN TOPIC or dont add at all. Thank you.

 

If you go with too high lift or bad lobe separation (causing the intake valves to collide with the exhaust valves) then you can have some serious issues from pistons contacting valves. Oversized valves might require pistons with larger valve reliefs to prevent contacting the valves. Milling the head to gain some CR may also affect piston to valve clearances. Other than the cam timing and valve to piston clearance, you should not have ANY issues with the engine from most common mods to the head (including cam changes). Just make extra-sure that your cam timing is set properly for your setup (meaning you will need adjustable cam gears).
I believe what you've heard refers to the problems with the "floating" bores in the engine. They're a real hotspot when it comes to putting a good amount of boost, increasing the CR of the engine, or elongating the stroke since they tend to flex. When that happens you can wind up with all kinds of issues.

 

people that blow their blocks with built heads are the idiots that think that just because they have bigger cams they can rev higher than stock. then send a rod through the block because they were never intended to rev so high. or the cams are too big causing the valves to make contact with the pistons. or they dont have the proper springs leading to valve float.

 

so what would i need to use in order to be able to install type-s pistons in my h23?

 

Most pistons are designed with large enough valve reliefs that you shouldn't have to worry. As long as you match all your parts for the rpm range you're building for, adjust cam timing appropriately, and check the clearances when you build you shouldn't have a prob.

 

Ok cool. is there a way to do some number calculations of this prior to spending the money for something i may not need?