RAM EcoDiesel a Flop for Towing

wilber1 wrote:
No, not exactly 14.7 but a narrow range around it.

Sooo, that would make your "It can use excess boost for internal engine cooling but the gasser can't because it is tied to a 14.7:1 air fuel ratio." statement that you made earlier wrong now does it.

wilber1 wrote:
If you don't believe a diesel can use a large amount of boost for engine coolingand a gasser can't because its boost is limited due to it being directly related to power output

I said this? Please show me where I said this. I am dying to see. Also, I don't know how many times i have to tell you this, but direct injected gas engines inject fuel between strokes to cool of the engine.

"Unlike with gasoline port fuel injection, the air/fuel mixture is formed directly in the combustion chamber in engines with gasoline direct injection. Pure fresh air enters via the intake valve. The fuel is injected into this airstream at high pressure (up to 200 bar). The result is an optimum swirl effect and improved cooling of the combustion chamber, paving the way for higher compression and, in turn, greater efficiency"

http://www.bosch-mobility-solutions.com/en/de/powertrain/powertrain_systems_for_passenger_cars_1/direct_gasoline_injection/direct_gasoline_injection_23.html#

"Spark Ignited Direct Injection (SI DI) of fuel extends engine knock limits compared to Port Fuel Injection (PFI) by utilizing the large in-cylinder charge cooling effect due to fuel evaporation. The use of gasoline/ethanol blends in direct injection (DI) is therefore especially advantageous due to the high heat of vaporization of ethanol. In addition to the thermal benefit due to charge cooling, ethanol blends also display superior chemical resistance to autoignition, therefore allowing the further extension of knock limits."

http://papers.sae.org/2012-01-1284/

wilber1 wrote:
try ramping the EB's boost up to 23 PSI and see what happens

You can't. Max boost on the 2.7L and 3.5L Ecoboost engines is is 12 psi so......