Originally Posted by Greg_8507
The generators I work on had an inline 6, which was later replaced with a turbo charged inline 4. Both engines are rated as the same HP and torque at 1700 rpms, which is the operating speed at which you get out put from the generator. After repair, we connect then to a dummy load to put it through its paces and make sure it works. The old inline 6 bogs down but holds strong at 150% load. The newer turbo charged inline 4 bogs down so far at 95-100% load, it faults out. Both engines are made by Detroit Deisel. Just a tend I see.
Well that's a good comparison. Side by side at the same rpm.
But what it tells me is that the turbo 4 really doesn't really have the same torque and hp as the 6 at 1700 rpm, despite what Detroit Diesel says. Maybe DD fudged the numbers or honestly made a mistake when testing it. Dunno, but it sure sounds like they're off.
It takes some serious voodoo to extract more ooomph out of a small engine. But over the years manufacturer's are doing it. In general, modern engines are smaller but more powerful than older models. Like the old 7.3 Power Stroke diesel at 505-525 lb-ft of torque at 1600 rpm, compared to the current 6.7L diesel that gets 800 lb-ft at 1600 rpm. It's incredible, really.
With Ford's Ecoboost V6, we now have a couple of years of towing experience by thousands of owners. And there's no doubt that it generally lives up to Ford's specs. And Ford's own graphs show the Ecoboost has more low-end torque than its 6.2L V8.
But who knows. I would love to see a real world, side-by-side tow/haul comparison: Ecoboost versus the 6.2L V8. We'd just have to make sure the 6.2L was kept under 3000rpm or so
, 'cause it definitely blows away the Ecoboost at higher rpms.