So now that you have worked this new truck a little while are you glad you went medium duty? Or is it not what you were hoping for?
Kinda winded.... All in all for basically blind shot in the dark..... Nailed few things, slight missed few others... IDK if I completely missed anything yet..
Trans/gear ratio/tire size, rto164713/3.31/255/70/22.5 is home run.
Even at a longer WB 150"/136" it's substantually more manuverable than the dually definetly rides better.
Air ride pretty much Trumps any leaf spring suspension
Air fan clutch is a win..
While the 362/68 is bigger than the WH1C I pulled off, it would not surprise me if drive pressure was above 2:1 when above 1600rpm even, though I've back the WG of some.. I've hit 1350 EGTs pulling 7-8% grades on I64. 1100-1200 is pretty common. Cruise is ~800 all pre turbo temps..
Boost is 15-20#@70 @1650 RPM probably should be half that..
362/74 is next, I'd jump straight to a 464/83 but without a gate I'm worried I'd lift the head without studs. Or overspool it due to shear air flow.
The 11m pump half miss I'd say, I can run 55-60 @35k up a 5% in stock setup, outside afc full travel mod, only time it will roll smoke is in pre boost, once above 10# it's clear
Columbus diesel, ~900.00 to swap out the constant pressure DV, or 1300.00 for brand new 8.3 12m pump
No issuse with the HYD brakes, have enough weight on the rear it put anything laying on the bed or seat on the floor without much effort.
Engine... Definetly has potential, I think someone hodgepodge it together and/or might actually had 240k on it... MPG pretty much mid 8s, seen 7.8-10.3... really think I should be mid upper 9s if not 10s, I'm definitely below fuel consumption test for the 430hp marine 8.3 of mid 8.Xgph vs low 6.Xgph at same RPM
70mph divided by 8.5mpg is 8.3 gph
70/6.5gph is 11.2 mpg
$3.2X diesel isn't helping.
70-75 is really easy right now....unless there's substantal head wind or high profile load
ECT 182-185
fan comes on 195-200
EOT 190-210
Grade speed/MPG current are behind/below when compared to what the dmax did even with a worn out Engine.. avg 9.8 mpg with the dmax for '17.. fresh dmax after rings seated was 10.5-11
Should have sent the pump/injectors off.. :doh:
Between who knows what pump/injectors combo...choking the exhaust with a small turbine turbo
Really tight gov Springs.. doesnt really help anything..
Am I glad? I'm not sure yet... 6-7 weeks in... right now my OCPM is higher.... definitely Nice having more cabin space.. somethings yes.... Others.. jury is still out on..
I get back in 10+ mpg and not having to slow down for grades I'll be more happy/content with it
