There is no real discrepancy here, the numbers fall within a % or two of the stated RPM. It could just be I didn't get the exact point stated where the numbers came from in the RPM range as I glanced at the graph and said it appeared to be close enough to 4500 to call it such. If you do the reverse math with the HP and tq numbers is comes out to 4612.5305 RPM's

Rick


Owner of 00 #1611 Silver (Totalled) 98.5 T-Red SVT #6180 Buckshot77@msn.com Misc 3L parts for sale