Quote:
Originally Posted by radz28
THAT would make sense. And, IMO, would not be apples to apples, BUT, would be interesting. Still - I'd like to know what kind of temperatures are being measured. I'll accept GM can extrapolate MAT, but most anyone outside of smokeshow (or someone along those lines), I'm not sure I'd just take their word about this stuff without actual data monitoring. I can accept there is a temperature difference from bank to bank, but how much it matters is what I want to see. I know GM is not above saving money, but surely they have modeling (which isn't always perfect) that shows what impact this plumbing has. I'm sure they way they did this was for emissions, and maybe even for durability. They want to bring oil temperature up as soon as possible for wear and all that. I'm sure bringing it up quick also helps burn off moisture and vapors for emissions and keeping the oil healthier for longer or something.
I am a little dubious of bypassing the OEM plumbing to an extent, but I, also, have no data to back any of my thoughts up, so I can't prove anything.
I'm interested in learning though.
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Great comment and I will try to keep this on target which is to explain the results based on data collection, using both the GM ECU and the iBanks analog and canbus data provided.
As for the 60-130 times, sure a ZL1 will have a substantially better time due to the softness of the suspension and the magnaride helping with lower drag coefficient as speed builds. The ZL1-1LE has many elements both visible and under the car that move air for cooling and drag for downforce which affect the 60-130 time, not limited to the traction available.
So back on topic...
The smart-coil technology is what is adjusting balance by varying the timing, dwell and spark to each cylinder. The TUNE gives you a command threshold target, to which your modifiers are "hoping" the combination will match... this is why you have a COMMAND and ACTUAL indicators in the datalogs. You also have Bank 1 & 2 which is how the ECU is trying to deal with the differences across the engine. What I have done is the PHYSICALLY tune this engine to get the temps as close to accurate or "target" as possible and then let the ECU "Fine Tuning" work the magic. We all know leaning makes power, but at a risk... I am narrowing that risk to make more power & torque. SO... instead of attacking my data based on driver, tires, timeslips or the rotation of the earth when the g-forces were applied... maybe look at the results as I do with 30-years+ of tuning jet turbine engines to find the power safely, using that technology to remove the waste in my LT4.
As I also said before, I have been using this approach to finding power where others never look and this is how in Road Racing, our cars have been dominant in many racing events including Five, One Lap Of America overall wins where reliability, drivability and insane power had to be on tap.
As for why GM designed the car this way... that is easy. To be a production car it has to perform in all markets, regardless of the climate. Its as simple as just looking at two completely different departments at GM to see how messed up this is. One Engineering Division develops the "FLOW-Tie" to increase airflow to the radiators... then another concerned with Pedestrian Safety adds a huge rubber pad and aluminum impact bar that blocks 40% of the inlet opening, hindering airflow to the radiators. Which departments do you think are winning over what we would build? Not ONE Camaro I have seen hit a wall at the track ever had a better result from the aluminum "IMPACT BAR" that folded like a tin can.
As for why I did not do a baseline...? Because when I took delivery of Shocker, I found out the seller had already installed an ATI balancer and Pulley without any tuning and the DSX ethanol kit without unlocking the ECU. I am on a tight timetable and no time to source a stock harmonic balancer or pulley. I did reach out to Matt at DSK and ask for some stock parts, but the timeline I have didn't allow for such. We can all stipulate a stock ZLE should put down 585whp.