▲ 77 r/EngineBuilding
Think this will take 1000hp?
Specing out a rotating assembly for a gen 3 hemi. Looking to make <1000hp on nitrous, and maybe 650 NA.
u/Gamejunky35 — 2 days ago
u/Gamejunky35
▲ 15 r/ECU_Tuning
Temperature indicating paint on headers?
Im considering options for sniffing out hot/lean cylinders without going as far as individual egt/wideband sensors. Would something like this painted onto the collectors be effective for finding a hot cylinder between pulls? Like if one was running closer to stoich while the others were closer to 12:1, do you think the paint would be noticeably changed, maybe going green while the others stay red?
u/Gamejunky35 — 8 days ago
▲ 1 r/ECU_Tuning
What are you opinions on vvt tuning at low load/cruising?
Currently working on the tune for a 6.4 hemi stock internals. Its got a single cam that can be advanced or retarded 14 degrees either way. 98-126 exhaust centerline.
Im trying to work out a theory on setting the vvt for part throttle operation. Stock tune has all part throttle set for full retard below 3000rpm
My argument to advance the cam is that it cranks up the dynamic compression ratio up to 9.8:1, which should theoretically boost efficiency with timing set most likely at the knock limit.
My argument for retarding the cam is that I should be able to extract more energy by opening the exhaust valve later, and the lower volumetric efficiency means ill have a higher map pressure for a given horsepower demand, meaning less upping losses. Ive confirmed engine does not seem to knock, even at significantly higher timing, probably because the dynamic compression ratio is ~7:1 at full retard.
u/Gamejunky35 — 26 days ago