Bulkhead cooler. Final verdict.

[Sheetmetalfab]

I run a 8” shorter tunnel, no extra cooler, no snowflap and a turbo.

No cooling issues.

2016 pro rmk.

 

[richracer1]

I wonder what would happen if you bypass the tunnel coolers and just run the bulkhead cooler..

You will overheat constantly. The bulkhead cooler does not have enough capacity by itself to keep the engine cool.