C7 ZO6 LT4 VS CT5 Blackwing LT4 - Spark table

Hey guys, I'm trying to figure out what are the differences with the LT4 found in the 2019 C7 zo6 and the 2023 CT5 Blackwing LT4.

I was looking over the spark table for both vehicles and the 6.2 engine in the Blackwing is tuned more aggressively than the LT4 in a C7. Looking over the engine and supercharger specs online both engines appear to share the same engine displacement, engine compression, and supercharger size.

Anyone care to enlighten the group?

2023 Blackwing V spark table
Attachment 138391



2017 C7 Zo6 spark table
Attachment 138392

Did you account for any of the modifiers? Can you send me the file so I can look in more depth?

Maybe the weight difference. Bout all I could think of.

A Lighter car technically could handle more timing than a heavier car...all things being the same. But without seeing the other modifiers on the Blackwing, there is no telling how different they really are.

Old thread but after seeing data logs on one of these in stock form, they actually do run a lot more timing but wayyyy up top like 6200+. Like 28-29 degrees.

If the engine is the same internally as all other LT4's, wouldn't this go against everything we thought we knew about max timing on the LT4? This is more timing than I would run on E80.

I think CSP just dropped a video on one of these, and if I recall, it was pulling timing up there where it looks like there's a lot more on some hits. And I think those guys have 93 available to them, and could GM have added a lot more advance and just rely on the ECM speed to correct and learn down or something?

https://youtu.be/CfTNpzznV40?feature=shared&t=885 around 14:45

Just saw this today on a buddies of mines blackwing I was pulling logs from. Wild the timing these have from the factory.


Does anyone think these would benefit from race gas? His was pulling 8 degrees on 93 octane.

Quote:

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Originally Posted by Sleepys4

Just saw this today on a buddies of mines blackwing I was pulling logs from. Wild the timing these have from the factory.


Does anyone think these would benefit from race gas? His was pulling 8 degrees on 93 octane.

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It would be worth a shot. A little booster wouldn't hurt anything.

Just looked at my factory file. Not sure if I can pull one of my buddies Auto Blackwings but I'm going to see if it is any different.

Is the Blackwing file shown in the first post from a manual?