Hagen Brothers farms,Goodrich ND | The rods might stay on to 4000, but I suspect the stock valve springs will put you into valve float at anything above 2700-3000 rpm. You dont want to float and drop a valve in that engine.
A 2 cycle Detroit is not really supercharged, that blower is more of a ventilation device to push clean air into the cylinders at the same time as it pushes the exhaust out the top. .I suspect it does not add more than 1 or 2 psi max of boost to the air charge, and remember that the exhaust valves are open any time the intake ports are open, so it can not produce much extra pressure in the cylinders.
You will gain a good power boost by aspirating propane into the intake air.
Max rpm of the VS governor is adjusted by removing spacer rings that limit travel of the spring cup, and by adding shims under the spring in the end of the spring cup.
Edited by Jon Hagen 9/11/2010 22:15
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318 Detroit: Max rpm for tractor pull?
