On some of the Cummins 4BT charts, the difference in compression ratio is only .5 for turbo vs. non turbo pistons. For what you are doing, just run it without the turbo, just the exhaust pipe and you'll be fine.
If you talk to older mechanics you will hear stories of engines that ran for years or goodness knows how long before they found out the turbo was stuck and not spinning.
The biggest thing you may notice if you get pulling a heavy load is more diesel smoke from some unburned fuel out the exhaust pipe. Under a light load the turbo does not add much boost anyhow if you watch a boost gauge.
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Today's Featured Article - Self-Starting Tractor - McCormick 10-20 - by Francis J. Robinson. I remember it very clearly even though it was almost 50 years ago and I was only about seven years old. My Dad had purchased a new Ford-Ferguson tractor and basic set of implements when he started farming just about the beginning of W.W.II. It was considered a pretty nice outfit for their 70 acre central Indiana grain and livestock farm. Dad spent several years during the war testing aircraft engines at Allison Engineering in Indianapolis working seven days a week on a twelve hour night sh
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