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Old 09-16-2009, 11:25 AM   #65 (permalink)
CoastRider
EcoModding Lurker
 
Join Date: Aug 2009
Location: Central PA
Posts: 90

Draco - '89 Ford F150 ext cab shrt bed XLT Lariat
90 day: 16.45 mpg (US)
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A 6.9 or 7.3 IDI (not sure which one is in the truck) isn't exactly a "modern" Diesel They are great engines, just not very modern compared to what we have now.

Jacob You said you added a vac pump to operate the brakes with the engine off? Where did your brakes get vacuum before you added the pump? certainly not from the engine....

As for reduced pumping losses due to not having a throttle plate keep in mind the diesel's high compression ratio and heavy duty rotating assembly compared to gassers.
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