Read this chart: http://www.motorsportsdigest.com/tech/perform2.htm

Now, (627hp/8)*6 = 470hp! ^^Must read the disclaimer about that chart. The readings are for a V8 Surpercharged application. Turbo is more effecient, so if you are maxing out 42# injectors, you are well over the 450hp mark

For Sale: 1997 Explorer XLT V8 AWD