Quote:
Originally Posted by Joshinator99
There is no VE on the Gen5 LT engines, only VVE. Nothing to do with O2 trim since the previous poster referred to “feeling soft” which is typically a throttle response issue. No surprise since the TB is different and not tuned for.
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My apologies, like I said, I haven't played with a flash program for this engine yet.
I had to look up what a VVE table is, and from what I understand of it; it's a Virtual Volumetric Efficiency table, or rather more like a Speed Density table.
Nothing too ground breaking really. ITB's need to be set up like this when not using a MAF and air box.
So in a round about way, it calculates how much air it should be seeing and supplies fuel and timing to correspond with that. There is a benefit to altering the table to get more efficiency, translated as more power.
I am trying to wrap my head around one small point here though.
It's widely accepted the LT4 runs in knock retard due to the undersized SC. Sooo, why wouldn't the ecu be able to adapt around this? Timing tables and fuel tables are all adaptable tables relative to information from the o2 and knock sensors. Speed density is calculated from throttle position and MAP and IAT, so a change in throttle body size outside of adjustable range will cause more issues for sure, like throttle response and overall timing tables, but feedback from the other sensors should alleviate some of the downsides.
At least the way I understand it. I'm happy to be wrong here. Yall know way more about the flash tools for this than me.
