Posted by BarnyardEngineering on February 10, 2022 at 04:35:07 from (161.69.121.34):
In Reply to: 4030 posted by bmiller36 on February 09, 2022 at 13:00:00:
The specs are "more is better."
Generally speaking you need about 50 to run. 75 for the engine to start without being dragged around the yard by another tractor. 90 for it to have any power at all. At 100, you stop scowling and say, "Hmm that's not bad." At 120, you crack a smile and say "That's pretty good." At 140, high fives all around. At 160, bust out the champagne.
What's most important is the readings are fairly consistent across the cylinders. Ideally 10% variation at most, but engines will run with much larger variations. It's all about what you want out of the project.
I've never really noticed a difference between carb open and carb closed. I've never really noticed that it matters much whether you do the exact same number of cranks for each cylinder, or just go until the number stabilizes. We're checking compression here, not aligning a particle collider.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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