Another bogus hp rating.

Greg Hill · 03-26-2010, 04:09 PM

Charley, calm down. I made the assumption based on Ford's own rating of the 2007 motor. With a larger throttle body and a full point more of compression it should be 10 or 15 more than the 2007. As far as my motor I think it's a pretty tough combination. I might be able to go a second under the new index in killer air but that would be it. I would also add that I've thrashed on it for 20 plus years and spent a lot of money trying to make it run fast.
I do agree with one thing you said, the 350 fuel injected motor was probably 15 or 20 hp soft to start with, but the intake on those motors is terrible and they won't rev up.

There is a big difference in being 15 or 20 soft and 75-100 soft. If you look at stocker motors a really good one should make about 1.5 times it's rated horsepower. I just got my motor off the dyno and it didn't do quite that well. It was closer this time but still a little short..All that 4.6 l motor would have to do at 235hp would be352. That may not be a 475 hp motor but I bet it will make 425-450. So lets compromise and rate it at 290. That's 10 less than the 2007 GT motor.

03-26-2010, 04:09 PM	#6
Greg Hill VIP Member Join Date: May 2006 Location: Louisville , KY Posts: 1,995 Likes: 68 Liked 279 Times in 68 Posts	Re: Another bogus hp rating. Charley, calm down. I made the assumption based on Ford's own rating of the 2007 motor. With a larger throttle body and a full point more of compression it should be 10 or 15 more than the 2007. As far as my motor I think it's a pretty tough combination. I might be able to go a second under the new index in killer air but that would be it. I would also add that I've thrashed on it for 20 plus years and spent a lot of money trying to make it run fast. I do agree with one thing you said, the 350 fuel injected motor was probably 15 or 20 hp soft to start with, but the intake on those motors is terrible and they won't rev up. There is a big difference in being 15 or 20 soft and 75-100 soft. If you look at stocker motors a really good one should make about 1.5 times it's rated horsepower. I just got my motor off the dyno and it didn't do quite that well. It was closer this time but still a little short..All that 4.6 l motor would have to do at 235hp would be352. That may not be a 475 hp motor but I bet it will make 425-450. So lets compromise and rate it at 290. That's 10 less than the 2007 GT motor. __________________ Greg Hill 4171 STK