The 6.7 Cummins grid heater is prone to failure, but why is this? We'll discuss the reasons and the fixes for this ...

While the lower compression ratio for the HO 6.7 seems counterintuitive, it allows Cummins to dial up the turbo boost pressures to make more power when needed while keeping emissions in check.

lower intake temperatures help avoid problems such as pre-ignition or engine knock, which commonly occur when the air-fuel mixture ignites too soon from excessive heat. The 6.7L Cummins engine ...