Huntindog wrote:
And only the GM numbers are SAE certified.
What does that mean?
It means they are real.
Unlike the Ford moving from 440 to 450 in 2018. That was in direct response to GMs upgrade in 2017... I doubt anything really changed, other than the testing method, which was NOT certified.
This is false. All are SAE certified, but use different SAE certification processes. Cummins uses J1995 just like all engine manufactures that only make an engine and cannot control the intake and exhaust system of the vehicle the engine will be put in. This does not mean that Cummins(or any other engine manufacturer) cannot simulate the intake and exhaust system that these engines are going in, but they still can only do a J1995 certification since they only manufacture the engine, not the vehicle.