Camper Design, What Were They Thinking?
I had a call from a friend yesterday to help him with his Cougar 5th wheel. They bought it last fall from CW and have had it in storage this past winter. Moved it to their house to pack and get re...
Forum Discussion
valhalla360 wrote:Iraqvet05 wrote:
The compression ratios of modern engines would make it impossible to turn a car over by hand.
Actually, compression ratios haven't changed much at all in decades for gas engines.
Something like 8-1 is typical. High performance will get up around 9-1.
They can't go too much higher or they will start to knock and compression ignite (diesel operation), so you can hand crank a modern 4 cylinder roughly as easily as an old model T (of course assuming they provided a crank and a place to fit it)
8:1-9:1 is common for a modern engine but the Model A and T (when hand cranks were common) had a compression ration of 4.5:1.
I got to drive a 1930's Allis Chalmers WC tractor in a parade once (wife's grandfathers) and it about killed me trying to get it started by crank. Those guys had to be tough to own a car or tractor back then.
