Yes, the
H23 is a closed deck design.
And this particular block is being built up by one of the other Navy sailors here in Jax, FL to produce 500 hp(turbo'd/intercooled) in his 94 accord.
Personally, I have a 90 Accord 2dr LX 5spd w/240,000 mi on the stock F22A1(8.8:1CR). As soon I finish the turbo kit, I plan on boosting the engine til it detonates, so I have an excuse for the wife to drop an H23 in. She won't let me "fix" the engine unless it's "broken"!!!
My setup so far:
-custom tig-welded tubular manifold w/ ext. wastegate flange, designed to retain use of A/C
-Turbonetics 7.5lb Deltagate
-.48/.42 A/R Garrett T-3
-2.5" mandrel-bent down pipe and Stainless exhaust
-Tig-welded aluminum Air-water IC fabricated from Rustang SVO unit w/Spearco core
-cheap Bosch BOV
-Vortech 10:1 FMU (I know it sucks, but $150 less than S-AFC)
-Walbro 255 hi-flow-in-tank fuel pump
-Battery relocated to the trunk to allow space for mounting air-water IC
Another useful note: The F22 non-VTECs and the H23 share the same exhaust manifold gasket and bolt pattern
That means the turbo manifold is completely swappable between motors.