im going h23 vtec and all i have to do is put the head on which im doing as im speaking im running 2001 h22 pistons and i milled the head 40 over....i just wondering because i was told that compression ratio works just a tad bit different when doing h23 vtec.....thanks

 

I think that you will be running about 11.5:1.

info needed to calculate...
H22 head cc 53.8cc
H23 bore 87mm
H23 stoke 95mm
OEM head gasket .027"
effective OEM Gasket thickness after.040" mill = -.013
H22 piston cc ~2cc

Oh BTW, your cam timing will be retarded about 1.1° cuz the .040" mill.
So you might look into some adjustable cam gears.
the Pirate

 

the 11 5 1 sounds just awsome but the retarded timing just sucks. i fugured that i would set the timing on the distributor to like 18...what do you think

 

cam timing is completely different than ignition timing
bad cam timing gets you piston to valve contact like when your timing belt snaps
bad ignition timing gets to reduced power/effiency(when retarded) and knocking (when advanced)

 

wow i see... so for sure cam gears are nesessary?
what should i set my distributor at

 

One degree is really not that much but when you go all motor and you are trying to squeeze all of the power out of you engine then Adj. cam gears are a good idea to play with cam settings. Otherwise $200 can be spent elsewhere like learning to drive.

Set your ignition timing to 15°, I believe that is what the mark on the flywheel is. Otherwise it is something that you need to tune on the dyno for the most power.

the Pirate