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08-04-2018, 11:14 PM
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#1 |
 
Drives: 2018 Camaro SS Join Date: Mar 2018
Location: Ca.
Posts: 168
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How does my LT1 motor go from V8 to V4
I'm trying to learn about my Camaro. One question I have is how my LT1 goes from V8 to V4?
Thank you for your replies |
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08-05-2018, 06:52 AM
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#2 | ||
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Thank you Al Oppenheiser!
Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017
Location: Sarasota, FL
Posts: 5,183
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In a nutshell: The lifters stop lifting and the fuel is cut off to 4 cylinders.
Here's a couple vids... |
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08-05-2018, 09:41 AM
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#3 |
           
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 7,665
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Disable it...it's the worst technology GM ever came up with for such marginal fuel savings.
__________________
 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |
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08-06-2018, 05:25 PM
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#4 |
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Drives: 2018 Camaro SS Join Date: Mar 2018
Location: Ca.
Posts: 168
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I see the valves are not opening. Are the lifters shutting down for v4 mode?
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08-06-2018, 06:14 PM
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#5 |
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Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016
Location: US
Posts: 1,213
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What about the air noise it makes when it engages 4 cyl at low speeds? I assume this is when there is a certain volume of air inside the intake manifold and then you cut half the displacement and you get a air backfire out of the intake?
But it almost sounds like the noise is coming from the exhaust? Either way what's weird is that you never hear the noise when it switches on the highway. I'm not even sure looking at the tables in HP tuners how AFM is engaged? Weather it is torque based or not? There is no scaler table controlling engagement, only hysteresis and temp settings? |
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