2014 SS Camaro cam and CAI only pinging bad

[96LT4C4]

As the title says. New LS3 crate engine, GM 219/228 cam, CAI, M6. Everything else bone stock, even exhaust is stock. Its pings severely and is audible, not false knock.
The car has 93 in it, I suspected the fuel and have tried two different stations. I have tried taking timing out of the stock timing table and richening up the PE table and it still pings.
The car currently does not have a wide band, which will be installed later, but I thought I may be able to get it close without one. The NB 02's show that the car does richen up when it
goes into PE. Is it possible the stock exhaust is restrictive enough to cause this?

[Alvin]

I had a very similar situation recently. This is going to sound crazy but.. It was injectors.

Guy brought a ton of parts for us to install including a crate engine. We did and it knocked HARD between 4500-5200 RPM. with 15 degrees of timing in it. We were convinced the engine was really high in compression like 12+ to 1.

We tried all kinds of things. Eventually decided it was high compressoin and we just need to do it on E85 and be done with it. We installed injectors for E85 and the problem completely went away. It took reasonable amounts of timing. No more audible or sensor knock.

The car never missed. I have logs (had to send them to engine builder) with perfect AFR. Never gave any indication there was anything odd going on with the injectors. But injectors fixed it. I'm personally on my 23rd year of tuning professionally. I've never seen or heard of anything like this. I've had bad injectors before. Never anything like this.

Oh also.. When we swapped injectors I just dumped the injector data and went for a drive. It didn't take any tuning. Fuel trims and wideband were all still super close. So it's not like one injector wasn't firing or something. It must have had something to do with a screwy spray pattern or something.

[96LT4C4]

I had a very similar situation recently. This is going to sound crazy but.. It was injectors.

Guy brought a ton of parts for us to install including a crate engine. We did and it knocked HARD between 4500-5200 RPM. with 15 degrees of timing in it. We were convinced the engine was really high in compression like 12+ to 1.

We tried all kinds of things. Eventually decided it was high compressoin and we just need to do it on E85 and be done with it. We installed injectors for E85 and the problem completely went away. It took reasonable amounts of timing. No more audible or sensor knock.

The car never missed. I have logs (had to send them to engine builder) with perfect AFR. Never gave any indication there was anything odd going on with the injectors. But injectors fixed it. I'm personally on my 23rd year of tuning professionally. I've never seen or heard of anything like this. I've had bad injectors before. Never anything like this.

Oh also.. When we swapped injectors I just dumped the injector data and went for a drive. It didn't take any tuning. Fuel trims and wideband were all still super close. So it's not like one injector wasn't firing or something. It must have had something to do with a screwy spray pattern or something.

Wow. Thanks for the response. This one has me grasping for straws. I am usually pretty good at figuring out whats going on. The original engine dropped a valve and the engine was replaced. I don't know how long it sat before the new engine was installed, maybe the gas went bad. Or some of the injectors got damaged. I am going to do some more troubleshooting this weekend.

[Allen Vos]

As the title says. New LS3 crate engine, GM 219/228 cam, CAI, M6. Everything else bone stock, even exhaust is stock. Its pings severely and is audible, not false knock.
The car has 93 in it, I suspected the fuel and have tried two different stations. I have tried taking timing out of the stock timing table and richening up the PE table and it still pings.
The car currently does not have a wide band, which will be installed later, but I thought I may be able to get it close without one. The NB 02's show that the car does richen up when it
goes into PE. Is it possible the stock exhaust is restrictive enough to cause this?

What RPM, Gear, and speed is the pinging happening ?

If you don't have a wideband, I'm assuming you had the car tuned elsewhere?

You will definitely need a wideband to make sure you are not running rich or lean, Don't add or remove fueling by guessing.

You should log spark knock in the scanner to see where exactly its happening. This is something I'm currently working on as well

[edcmat-l1]

As the title says. New LS3 crate engine, GM 219/228 cam, CAI, M6. Everything else bone stock, even exhaust is stock. Its pings severely and is audible, not false knock.
The car has 93 in it, I suspected the fuel and have tried two different stations. I have tried taking timing out of the stock timing table and richening up the PE table and it still pings.
The car currently does not have a wide band, which will be installed later, but I thought I may be able to get it close without one. The NB 02's show that the car does richen up when it
goes into PE. Is it possible the stock exhaust is restrictive enough to cause this?

First off, where's the tune file and data log or are we diagnosing by brail?

Second, why are you putting a new crate engine in a 2014 Camaro? Catastrophic engine failure?

Need more of the backstory. Need to see the tune file and data log.

[96LT4C4]

First off, where's the tune file and data log or are we diagnosing by brail?

Second, why are you putting a new crate engine in a 2014 Camaro? Catastrophic engine failure?

Need more of the backstory. Need to see the tune file and data log.

Yes, the stock LS3 broke a valve spring and dropped a valve at 145K miles.
This engine was installed in its place.
https://www.summitracing.com/parts/nal-19434638

[96LT4C4]

FIXED

I started getting codes for all coils packs on the right bank, randomly. All 4 codes would come up together.

I found a lose ground for the right bank coil packs. The shop that installed the engine missed it.

All spark knock is gone.