I have made a boost controller that gives me about 13.5-14 psi max boost, (up from 9 stock). I don't really want to run it above 12 psi more that a few moments and don't

The other day was cruising at 65 mph at 6 psi. I climbed a hill and brought the boost to 12. I was able to maintain 65 but not higher mph. I guess if my boost controller would be bleeding the boost I could give it more fuel and that although I would have more power I would have a richer, less fuel efficient system. As I got closer to a big city I was running 70 and a similar hill let me maintain speed at 10 psi.

I imagine that I am am getting better engine efficiency at 70 rather than 65 but that aero losses are higher than the efficiency that is gained.

My last fill with 60-65 mph cruising and some 5 mile commutes yielded 30.3 mpg. I accelerate like a turtle and get it in to top gear as quick as possible.

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85 Merc 300D - Unwinding 31 years of wear
86 VW TD
Mahindra Diesel
Iseki Diesel

In 2007 I didn't own a diesel.

Interesting.


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ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
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1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

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