F450 vs Ram 3500 DRW tow vehicle
So the wife and I are moving to the full time RV lifestyle. We just purchased a 42' toy hauler this weekend, with a GVWR of 20K#. Now I'm looking at a tow vehicles. I'm considering either purchasing a...
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I will give you an example. Back when I was looking for a fixed geometry turbo, I could have went with an S369 turbo whis is a huge turbos and would have moved my peak torque points further down the rpms range which I did not want for towing. I could have gone with an S361 which would have would have made boost sooner than stock pushing my peaks to lower rpms, but would have little top end power. I ended up going with an S364.5 which is the middle choice between these two which makes peak torque at a little more rpms than stock but with more top end.
All without changing my fuel maps so the amount of power being generated, efficiency, and when would have changed with each turbo by adding/decreasing air even without altering fuel. Why, because the engine just injected fuel and the each of these turbos efficiency maps dictated how much air it can utilize at each rpm. You cannot do this with a gas engine because you would have to adjust the amount of fuel for the amount of air being added.
Each one of these turbos would have not only changed the rpm when I made peak power but also the efficiency at each rpm. With electronically controlled VG turbos, you have more control and can adjust the vanes to make peak power at various rpms, however, you also have to keep emissions and drive pressures in check.
All without changing my fuel maps so the amount of power being generated, efficiency, and when would have changed with each turbo by adding/decreasing air even without altering fuel. Why, because the engine just injected fuel and the each of these turbos efficiency maps dictated how much air it can utilize at each rpm. You cannot do this with a gas engine because you would have to adjust the amount of fuel for the amount of air being added.
Each one of these turbos would have not only changed the rpm when I made peak power but also the efficiency at each rpm. With electronically controlled VG turbos, you have more control and can adjust the vanes to make peak power at various rpms, however, you also have to keep emissions and drive pressures in check.
