C7 ZO6 LT4 VS CT5 Blackwing LT4 - Spark table

[regorih]

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
2023 Blackwing spark table.PNG



2017 C7 Zo6 spark table
2017 C7 Z06 spark table.PNG

[TriPinTaZ]

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

[Estep40511]

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

[TriPinTaZ]

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.

[TriPinTaZ]

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.

[radz28]

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

[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.

[TheMechanic]

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.

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

[Sleepys4]

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?