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Thread: 2013 ctsv spark timing vs 2013 ZL1 spark timing

  1. #1
    Advanced Tuner
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    2013 ctsv spark timing vs 2013 ZL1 spark timing

    Have you guys every compared the stock tune between these two cars? The ZL1 has a much more aggressive table in the mid range area than the ctsv does. I know the iat adder tables are more aggressive on the V than the ZL1, but they are drastically different. Anyone share some insight as to why they are so different? Anyone with a V try and running a similar spark timing in the mid range area? Just curious as to why the same engine has such a different spark table
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  2. #2
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    Damn, nobody has any explanation as to why they are so different? I know they have different lids, but I wouldn't think that would have made that much of a difference..

  3. #3
    Advanced Tuner jsllc's Avatar
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    Sep 2015
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    So we can never know why they did what they did. Best guess. Fuel type. I do not have the owners manual. What does it say for required fuel.
    2012 ZL1 - Maggie Heartbeat, Port & Polish Heads, Custom Cam, Custom rotating assembly, steel sleeved LS9, No NOS and No water meth. 16psi
    810rwhp and 820rwtq 91 Octane 6400 rpm
    948rwhp and 951rwtq 105 Octane 6400 rpm
    999rwhp and 997rwtq on 60% Ethanol 6400 rpm