Originally Posted by fdjizm
so how do you explain s197 dyno numbers constantly in the 270-280's? the dyno numbers are so normally in the 270-280's people dont even go crazy over it anymore. research to your hearts content i dont want to post info and you thinking it's fake or bias, you are capable of finding out for yourself
1) Engine is over rated from factory (unlikely, based on what is available)
2) Not using a load bearing dyno / not using the correct corrections
3) Operators trying to make a buck with big numbers.
Doesn't change the fact that they ARE NOT UNDER ANY CIRCUMSTANCE achieving <9% driveline loss. Sorry bud, just ain't happening.
Since we're talking mustangs... you may actually want to read some of these threads where graphs are posted. You'll find that other folks, often who have been doing this for quite some time, call the numbers posted into question.
^ Start reading.
Magnaflow had a hard time getting above 300rwhp with an exhaust change... on a 2010 (315bhp rating and a much better factory tune), etc.
Again, no one is arguing what a motor can or can't do, rather that the correction method you are implying (8% as "normal") simply isn't accurate. If a S197 mustang was rocking 280RWHP, she'd turn a far better time than a low 14 in the quarter. In reality, the S197 mustang puts down around the low 250hp mark (fordmuscle pulled the same number) which falls directly in line with it's power readings.