Some of these have a throttle plate for air control, and others just control the boost to maintain air fuel ratio. The turbo's use compressed air to spool them up and provide boost until they are working.
We sometimes retard the timing about 10 degrees to get enough heat in the turbo to provide boost so there is enough air. The engines will detonate under these rich conditions of too little boost. Once the engine is working, there is plenty of energy to spin the turbos. It is a balancing act to get the engine to produce enough torque to load up with the timing that slow so it can produce its own boost, then you can advance the timing.
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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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1965 International Harvester McCormick Farmall cub tractor 2,500. Two owner tractor. My grandfather bought new in 1966, then we inherited it. Have all the paperwork original manual and all maintenance records. It starts and moves. Comes with underbelly mower, plough, and some other attachments.
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