Part 5 – Compression Ratio. Build Notes

After putting the pistons/rods in the block, I was able to measure the actual piston to deck height. The machine shop decked the block to remove the minimum needed to make sure it was square and even with the desired surface finish. They didn’t report a final deck height, so the actual piston to deck was used to calculate the deck height of 10.725”. The rod lengths were measured and were spot on the spec 7.100” length. The pistons are 0.020” down the hole. I was expecting about 0.015” since I thought the final deck height was going to be shorter. I am using custom sized Cometic 5-layer MLS head gaskets with a 4.530” bore and 0.056” thickness. This makes the final Compression Ratio 14.3