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The ZC, D15B1, D15B2, D15B6, D15B7, D16A1, D16A6, D16Y7, D16Y8, and D16Z6 all have the same bore. The difference is in the stroke.
Got this from searching around google ======================================= D15 block / crank / rods + DOHC ZC pistons + B7 head + B7 head gasket = 9.2.6 compression D15 block / crank / rods + DOHC ZC pistons + Z6 head + Z6/Y8 head gasket = 10.04:1 compression D15 block / crank / rods + DOHC ZC pstons + Y8 head + Z6/Y8 head gasket = 10.45:1 compression
D15 block / crank / rods / B7 pistons + Z6 head + Z6/Y8 gasket = 10.11:1 compression D15 block / crank / rods / B7 pistons + Y8 head + Z6/Y8 gasket = 10.52:1 compression
The D16 pistons have a much lower compression height than the D15 pistons, so you have to have a huge dome to make the same compression ratio numbers. The DOHC ZC pistons' compression height is 1.7mm shorter than the D15B7's, so there's really no point in switching your pistons. Just use the stock pistons you already have and maybe a thin head gasket. If you can get your hands on the 2 layer Y8 gasket and a Y8 head, you'll make:
D15B7 bottom + Y8 head + Y8 2 layer gasket = 10.86:1 compression
_________________ Non Vtec Administrator
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