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Talk about engine building here. New products, tricky questions or showcase your work - If it's engine building related it's welcome here.
= Resolved threads
There is some older information out there on rule of thumb for DCR when balancing camshafts and compression ratio, but I'd like to know if anyone here has modern data.
The engine I'm getting into is an all aluminum 2 valve carbureted setup with fixed mechanical timing advance and it will be a full street car. The commonly available pistons are advertised at 10:1 static compression and the uprated intake cam is 291* duration w/IVC @ 52*, which maths out about 8.6 Dynamic Compression Ratio. I've seen some other comparable set ups which are operating in this same area, so I believe it is a reasonable target.
Our pump gas is 93MON with about 10% ethanol content.
