Thread: Compression ratio?

Thor 4.6 crank, 82mm stroke
Thor 4L piston and rod length?
I know the 4L piston bowl is 13.23ccl

what else do I need?

Originally Posted by PLR

The volume of the head gasket

The volume above the piston to the block deck

The volume above the top ring to the piston deck

The volume of the combustion chamber

Mostly lost interest in this sort of thing but the -13.23 you have for the bowl , where did it come from ?

I have this measurement written down as a figure i took from the internet ( years ago ) as a high comp 4.0ltr piston but when i measured a low comp piston got about 4cc more which upset my figures back then .

I also realised that using found figures won`t give a true indication .

Thanks for the requirements,,
bowl from here-
Buick 215 Rover 3.5 Land Rover 4.0 and 4.6 differences