Jeep Ecodiesel, vs Pentastar, vs Ram Hemi, vs Ford Godzilla

ShinerBock wrote:

IdaD wrote:

mich800 wrote:

philh wrote:

IdaD wrote:
Heavy duty trucks with gas engines turn into turds when you strap on a big trailer and hit a grade. It'll only be disappointing if your expectations are unrealistic.

I was a no replacement for displacement guy... EcoBoost changed me :)

True. That initial statement should have read "naturally aspirated engines" not "gas engines".

Has there been a HD gas truck that wasn’t naturally aspirated?

Nope, and I doubt there will be anytime soon or ever. If there was one, it would either need a huge cooling system or be de-tuned considerably to keep the temps in check.

The Ecoboost has an open deck design which is one reason why they are able to keep it cool. Most HD (gas and diesel) engines have a closed deck or semi closed deck design to handle the stress of the HD duty cycle. Putting a closed deck design on a turbocharged gas engine block in a towing application is just asking for overheating issues because the ports on the block are not big enough to keep the cylinders cool. Since diesels run much cooler than gas engines due to their higher thermal efficiency, they can have a closed deck block and still keep cool under load in many instances where a gas engine could not.

The open deck Ecoboost is great and reliable in a half ton duty cycle, but not in an HD truck duty cycle. Especially when you also have to meet emissions.

Exactly. So again, put a heavy load behind an HD gas truck and it quickly turns into a turd. Is what it is.