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Railcarmover · 10-10-2019, 10:09 PM

Reducing the combustion chamber in size above about 8 to 1 begins to limit how well it can breathe,the chamber is too small. Nothing is really new in model a speed,just about everything available today existed 80 years ago..High compression heads,OHV heads,cams,you name it..all of it ran on dynamically balanced crankshafts with babbit bearings.Like anything else you have to do it correctly,stacking compression on top of a unknown lower end will buy you trouble,be it babbit or inserts,build from the bottom up,it will last.

10-10-2019, 10:09 PM	#4
Railcarmover BANNED Join Date: Apr 2017 Location: Sacramento Posts: 1,262	Re: Max Compression Ratio Reducing the combustion chamber in size above about 8 to 1 begins to limit how well it can breathe,the chamber is too small. Nothing is really new in model a speed,just about everything available today existed 80 years ago..High compression heads,OHV heads,cams,you name it..all of it ran on dynamically balanced crankshafts with babbit bearings.Like anything else you have to do it correctly,stacking compression on top of a unknown lower end will buy you trouble,be it babbit or inserts,build from the bottom up,it will last.