View Single Post
      11-07-2019, 06:56 PM   #12
acl26
Private
37
Rep
73
Posts

Drives: 2018 BMW M2
Join Date: Jul 2018
Location: North America

iTrader: (0)

You mean get super knocking like mine?

If you get this at the track even if the engine doesn't die the piston is likely to be cracked either way.

But keep in mind that super knocking and knocking is not the same.

Next time I go back to my mechanic I will try to capture how bad the piston was. They took it out but I forgot to take a picture last time.

To that point, I don't recall anyone that saw my logs for that day indicated any issues with knocking or octane.

IAT was an issue though.

Logging will help with regular knocking but not super knocking.

Don't use BMW supplied oil. This was one of variables that changed from my usual track days and likely contributed to oil intrusion causing the hot spot on the side of the piston.

If you run really sticky tires stay out of lower half of RPM range. LSPI is another major variable that leads to super knocking.
Attached Images
  
Appreciate 0