2022 Engine Updates Explained
Thread Starter
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From: Lakewood Ranch, FL
Drifting
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Here’s to hoping these new systems don’t bring a bunch of headache down the line with malfunctions and mysterious CEL’s. Always hate being the guinea pig for a new thing but I’ll be damned if I delay my order for a ‘22 just for that. I imagine the new FPC motors will also be using some form of these improvements as well.
Race Director
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I read the article. I still can't tell, but I assume this is at least partly a hardware modification to some engine components? If its all software, then it could potentially be available via OTA updates, and could actually be included in 2021s being built now. Not that it sounds like anything we need to have.
Race Director
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Other sources have provided more info than (not) GM (not and) Authority.
The big news concerns changes made to the 6.2-liter small block V8. Chevy says it upgraded the fuel injection system and “improved” the engine calibration. We chatted with Chief Engineer Josh Holder to dig into this and the other changes on a deeper level. Essentially, the injection system operates at a higher pressure now, and Holder says this helps to lower emissions and provides greater stability at idle. That said, the engine keeps its 490 horsepower rating in base trim and 495 horsepower rating with the performance exhaust system. The 0-60 mph time for the Z51 car remains at 2.9 seconds, too. Holder noted that it took some work to both lower emissions and keep the power levels where they stand currently.
The last powertrain tweak is an “enhanced” Active Fuel Management range. Holder says that the engine will now deactivate cylinders over a broader range of rpms and in lower gears now. Engineers aren't claiming that the EPA ratings will inch upward yet (we're told to wait and see on that front), but they're certain that real world fuel economy will see a noticeable improvement."
The last powertrain tweak is an “enhanced” Active Fuel Management range. Holder says that the engine will now deactivate cylinders over a broader range of rpms and in lower gears now. Engineers aren't claiming that the EPA ratings will inch upward yet (we're told to wait and see on that front), but they're certain that real world fuel economy will see a noticeable improvement."
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Racer
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From: Buffalo Grove IL
My understanding is that the failures were due to the OBD-II system still being in the "Not Ready" state, e.g. they engine hasn't been run in enough different conditions that all of the self-tests were able to complete. It was not related to actual emission levels, which is what the higher fuel pressure would address.
Pro
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No detailed information provided..... left to speculate....
Fuel rail pressure raised from what... to what? 2,700 to 2,900psi?
To what effect?
Seems it would make LT2 more knock resistant. Engine management
encounter fewer situations where it has to pull timing.
Sure there's more to it than that....
Fuel rail pressure raised from what... to what? 2,700 to 2,900psi?
To what effect?
Seems it would make LT2 more knock resistant. Engine management
encounter fewer situations where it has to pull timing.
Sure there's more to it than that....
Le Mans Master
Joined: Aug 2000
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From: Austin Texas
