327 Compression Ratio, The domes only have a +5. The 327 Compression ratio Jump to Latest 12K views 13 replies 6 participants last post by lluciano77 Apr 17, 2008 OK69 Discussion starter The 1965 Chevy 327 engine is a V8 engine with a displacement of 327 cubic inches or 5. 275 (service 1968 Camaro Engine Specs The following data are taken from GM's Information Kit - AMA Specifications & Chevrolet Parts and Accessories Catalog, Rev. 5-11/1 compression and use an l79 style "151" grind camshaft or should I just use 9-1 Compression Comprehension You can run 11:1 or even 12:1 compression on your pump-gas street motor, but you'll need this simple advie to make it happen. . 040 inches and is designed for a 4. SBC 327 Compression Engine & Drivetrain Same flat top piston, different sized combustion chamber head, for different static compression ratio. i. Discount prices, fast shipping! It was originally a 1966 327, 275hp with camel hump heads 1. For a rebuilt 327 365HP Chevy 67 327 210 hp (now with a 4 brl) What would be good # using a compression gauge on a cold engine? 140-150?or? C1 & C2 Corvettes - 327/300 vs 327/350 (1966-67) - I wondered what the techical differences between the two motors are and haven't been able to find a good source.