RAM EcoDiesel a Flop for Towing
Here's the lowdown. Bruce
Forum Discussion
No one disputes that the EB is more powerful but you are asking me to believe that it can handle nearly 40% more heat in 17% less time than the ED and not be more stressed. I don't think so.
Regarding boost pressure which which you continue to bring up. As any diesel guy should know, diesels do not run fixed fuel air ratios like gas engines. It doesn't matter how much air you stuff into a diesel, if no more fuel is added no more heat (or power) is produced. It just isn't possible because the energy isn't there. Higher boost pressures in diesels with no fuel increase result in lower exhaust temperatures and put less stress on the engine, not more. If you have a diesel that is running high EGT's, stick a bigger turbo on it without increasing fuel flow and bingo, temperatures go down.
Regarding your claim that the ED is running at 90% of its maximum RPM to produce peak HP. It's redline is 4800 RPM and peak HP is 3600. My calculator says that is 75% of peak RPM.
In contrast, your 6.7 Cummins has a redline of 3500 RPM and makes peak power at 2800 RPM or 80% of peak RPM.
If you just use that criteria, the ED looks pretty good.
Anyway, I'll stop confusing the issue with facts now. Have a nice day.
Regarding boost pressure which which you continue to bring up. As any diesel guy should know, diesels do not run fixed fuel air ratios like gas engines. It doesn't matter how much air you stuff into a diesel, if no more fuel is added no more heat (or power) is produced. It just isn't possible because the energy isn't there. Higher boost pressures in diesels with no fuel increase result in lower exhaust temperatures and put less stress on the engine, not more. If you have a diesel that is running high EGT's, stick a bigger turbo on it without increasing fuel flow and bingo, temperatures go down.
Regarding your claim that the ED is running at 90% of its maximum RPM to produce peak HP. It's redline is 4800 RPM and peak HP is 3600. My calculator says that is 75% of peak RPM.
In contrast, your 6.7 Cummins has a redline of 3500 RPM and makes peak power at 2800 RPM or 80% of peak RPM.
If you just use that criteria, the ED looks pretty good.
Anyway, I'll stop confusing the issue with facts now. Have a nice day.
