1st day on the road. 2005 Winnie Vectra 400hp cummins 6 spd allison.
Level at 65mph is 1600 rpm and 12.5 lbs of boost. short steep grades (overpasses) cause 25-30lbs of boost. engine temp was about 185; got to just under 200 on a long grade where I slowed down to 35 mph in 3rd gear.
Questions: what level of boost is OK for an extended period?
what is desirable range for engine RPM. Feels like 16 - 1900 is good; not sure about any higher rpm.
For engine brake: apply at crest of hill?
can trans be shifted while engine brake is engaged?
other question(s) I should be asking?
thx to anyone taking the time to offer advice.
Level at 65mph is 1600 rpm and 12.5 lbs of boost. short steep grades (overpasses) cause 25-30lbs of boost. engine temp was about 185; got to just under 200 on a long grade where I slowed down to 35 mph in 3rd gear.
Questions: what level of boost is OK for an extended period?
what is desirable range for engine RPM. Feels like 16 - 1900 is good; not sure about any higher rpm.
For engine brake: apply at crest of hill?
can trans be shifted while engine brake is engaged?
other question(s) I should be asking?
thx to anyone taking the time to offer advice.