Shift Points for 6.9
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Joined: Apr 2017
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From: Eastern Nebraska
Shift Points for 6.9
I have been wanting to install a tach on my '84.
Are there recommended shift points for the 6.9? The owners manual lists them for the gas burners for each trans but nothing for the diesel. The supplement diesel manual says nothing pertaining to this.
Also what are the fast and slow idle speeds.
No need to install a tach just to watch the needle move.
All the info on my truck should be in my signature.
Thanks in advance,
Ed
Are there recommended shift points for the 6.9? The owners manual lists them for the gas burners for each trans but nothing for the diesel. The supplement diesel manual says nothing pertaining to this.
Also what are the fast and slow idle speeds.
No need to install a tach just to watch the needle move.
All the info on my truck should be in my signature.
Thanks in advance,
Ed
Lead Driver
Joined: Apr 2008
Posts: 6,938
Likes: 13
No recommended per se that im aware of, peak torque is 1400, peak horsepower is 3000. Low idle is 750, high idle is 3600 no load, 3300 loaded. Normal driving i shift around 2k, loaded or "spririted" 3k, depending on what i need. I wouldnt load the engine excessively under 1200 rpm. Hope i answered some of your questions. As far as BSFC ive looked, never found much, but imo they get the best mileage running 1600-1800rpm or 2600-3k. I personally never get good mileage running in the middle, with either of my IDIs
Scope Wizard
Joined: May 2019
Posts: 6,530
Likes: 25
There is a Cold Idle solenoid on the outside of the pump that can be adjusted ... and there is a Cold Advance solenoid inside the Pump that you really cannot adjust.
Anyway Cold Idle can be set between 900 and 1200 RPM. I normally go for 1000 RPM
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