A few elements that are being left out, by cutting off the plenum and hogging out the intake ports you are losing valuable port velocity and optimized cylinder swirl by lopping off the plenum and going crazy with a diegrinder, there's more to it than that, and folks get caught up in the latest fancy- smanchy- bolt on "trick of the week" by listening to a cleverly crafted sales pitch....:bang
Remove the intake and properly port the intake side while speeding up port velocity and optimizing the swirl will enhance the engines breathing characteristics and enhance the "thermodynamics" of the air delivery in the engines breathing, which is a nessesary component in our diesel engines......
By going hog wild with a diegrinder you would in turn loose these importantly nessesary characteristics of proper port feeding dynamics......
I know of someone who is a member here-( no names mentioned ) who opted to fall for a 'sales pitch' and paid a healthy amount of hard earned greenbacks for one of these super duper enhanced ported cylinder heads with a bolt on intake- when subsequent damage resulted to this expensively overpriced componentry this guy opted to install a stock cylinder head back on his truck- AND HIS PERFORMANCE INCREASED!!!!!:what:
I've also seen this same set up (different member- different truck) being started up and the starter continued to crank and crank and crank away, when the engine finally did start, the chuffing dynamics of the engines operation proved to me that port efficiency was thrown out the window with these big ticket items. On the dyno this set up may have generated some decent numbers, but I've also heard numerous reports of even greater numbers all done with stock style cylinder head......
Food for thought.$.02