SOHC ZC Compression

Does anyone know what the compression ratio is on the stock SOHC ZC motors. I'm trying to figure out what the CR will be once I put the d16y8 head on it which also depends on the headgasket type I use. I found a link that calcualtes the CR but I'm not sure if I should calculate using the d16a6 pistons or the ZC pistons cause it doesn't specify if it is for a DOHC ZC or SOHC ZC. It is really important I get an idea of the CR cause of the nitrous going with the set up. Check the calculator at http://www.knology.net/~jediklc/D.htm

I am not really sure if you can look up stats on a (correct me if i am wrong) 88-89 integra i think those cars had a zc motor in them.. if you find a manual or look it up on a search you probally could find somthing... that is if that motor came in that year car.