Rep Power: 621

I have done some searching on how to make my H23 have more Hp. I have came across the H23 Vtec a couple times. Could you put a H22A head on it? Is this possible?

Also has anyone put an H23 into a 91 Civic Hatch and yet have enough room for turbo?

 
Rep Power: 649

h23 is the same swap as h22 in a ef its really tight but i tihnk a turbo is possible and h23 vtec makes some wicked power

 
Rep Power: 621

I have read if you put an H22 head and use the ecu, and put it on the H23 it will worrk?

 
Rep Power: 649

from what i know you'll need this for a reliable set up...that might not ever be that reliable lol :
h22a head 93+(USDM) or 92+ (JDM) with all internals and valve cover
h22a thermostat housing
h22a waterpipe
h22a waterpump
h22a headgasket
h22a lower crank gear
h22a timing belt
h22a headbolts

h22a intake manifold (injectors perfered)
h22a header and downpipe
h22a cam gears
h22a top timing belt covers
h22a power steering braket (h23 doesn't line up right)

and to get the vtec to run you'll need to machine the blocked oil ports in the h23 block...i personally dont think its worth it man you'll be spending alot more for minimal gains but i would like to see it done...and i think the h23 and h22 have the same bore just ther stroke is different so run the 22 pistons for more gains..

 
Rep Power: 621

arent the pistons different size though? or just the rods?

 
Rep Power: 649

pistons are the same size i believe..just the stroke on the h23 is longer

 
Rep Power: 621

is there a difference between the pistons? how?

 
Rep Power: 730

dome and height