Quote Originally Posted by japan4racing
lowers it by .2 by my calculations on that site. stock b16 head on stock b18c1. now if you go changing pistons at the time of the swap i can def see where you could get crazy. b16 block with gsr head and p30's get you 10.65:1...rad
How did you get 10.65:1?


Block = B18C1/C5
Head = B16a/b-B18c5
Piston = p72-A0 (USDM B18C1)
Head Gasket Thickness = OEM B-series 3-layer
Piston-to-Deck Height = OEM B18A/B/C1/C5 - B20B/Z

Compression Ratio = 9.80



Block = B18C1/C5
Head = B16a/b-B18c5
Piston = p73-A0 (USDM B18C5)
Head Gasket Thickness = OEM B-series 3-layer
Piston-to-Deck Height = OEM B18A/B/C1/C5 - B20B/Z

Compression Ratio = 10.60