LOL
That's just one of many articles about the Hellcat being underrated. Many say by as much as 50 horsepower.LOL
I'll take SAE's scientific method of certifying and rating an engine vs random internet dyno runs. Have you ever stopped to think that maybe power drivetrain losses may not necessarily be straight percentages? There are just too many variables to list.
The ZF is a really damn good auto, so I wouldn't be amazed if it's in the 12-13% powerloss range.
This makes no sense. SAE certification is a methodology, they don't test every engine coming off the line, so if there is engine to engine variation that would not be captured.No it's not. SAE Certification makes for very small tolerances with engines having to be make +-1% of their advertised power. There is very little wiggle room. Read it for yourself if you don't believe it.
How big of a variance do you believe there is in production engines? A blue printed motor might make 20 more hp more then its off the shelf brother. I'm curious to how often you think perfectly matched engine parts find their way into the same engine on a random production line?This makes no sense. SAE certification is a methodology, they don't test every engine coming off the line, so if there is engine to engine variation that would not be captured.
My point is everyone waves their arms saying "SAE +/- 1%" and I ask, +/- 1% of what? Every engine coming off the production line is not tested, and I think it is highly likely that simple manufacturing tolerances result in greater than a 1 percent variation. I looked at the SAE standard that wasn't behind a paywall (just the abstract) and it talked about methodology, not sample size, so I don't know what people mean when they say +/- 1%. If I were a manufacture I would test a sample and I would underrate to ensure I never let an engine out of the factory that made LESS than rated power.How big of a variance do you believe there is in production engines? A blue printed motor might make 20 more hp more then its off the shelf brother. I'm curious to how often you think perfectly matched engine parts find their way into the same engine on a random production line?
I guess anything is possible. And without testing every engine. There will always be speculation. But my speculation is all the motors Ford is producing is in the 455-465HP range. Or +-one%.My point is everyone waves their arms saying "SAE +/- 1%" and I ask, +/- 1% of what? Every engine coming off the production line is not tested, and I think it is highly likely that simple manufacturing tolerances result in greater than a 1 percent variation. I looked at the SAE standard that wasn't behind a paywall (just the abstract) and it talked about methodology, not sample size, so I don't know what people mean when they say +/- 1%. If I were a manufacture I would test a sample and I would underrate to ensure I never let an engine out of the factory that made LESS than rated power.
Given the variation in panel gaps, I have a hard time believing that every engine coming out of the factory is making within 2%.
I really doubt that they are going to say anything other than we're all idiots. Even if we had Ford engineers over here.They're talking about this thread on Camaro 6 and some of these underrated 500hp claims. Let's not make ourselves look too ridiculous..lol
It's 1% of the goal power for that engine. They test random engines off the line, and they all have to make X power +/- 1%. Advertising the number at the bottom of that 1% variance IS under rating as you can make almost 2% more if you get lucky.My point is everyone waves their arms saying "SAE +/- 1%" and I ask, +/- 1% of what? Every engine coming off the production line is not tested, and I think it is highly likely that simple manufacturing tolerances result in greater than a 1 percent variation. I looked at the SAE standard that wasn't behind a paywall (just the abstract) and it talked about methodology, not sample size, so I don't know what people mean when they say +/- 1%. If I were a manufacture I would test a sample and I would underrate to ensure I never let an engine out of the factory that made LESS than rated power.
Given the variation in panel gaps, I have a hard time believing that every engine coming out of the factory is making within 2%.