Just been informed the dyno run was done on 91ron, detuned cats ****
and i have just found the explanation from RSI on the figures
Been looking at the Dyno sheet Jason sent out to me. Firstly, how do I know this is from my car? Secondly, it peaks at 605bhp when I thought we were more like 650ish (in other words 750 ish at the crank hence RSI750).
" I spoke with Jason about the dyno numbers and he assures me that they are in fact your numbers and you can tell because of the date the car was dyno’ed and the date on the dyno sheet. The reason for the lower numbers is due to several reasons. The first reason is you have Catalytic Converters on the car. This in fact lowers the dyno numbers by about 20RWHP. We also add less timing to vehicles that are scheduled to go north of Virginia because of the weather fluctuation and problems our other customers have had with bad gas. The more timing you can add the more horsepower a car has. A total of this is usually around 35-45RWHP. You are making around the 750ish to the crankshaft but with the catalytic converters and less timing, you are only seeing low 600’s. Please let me know if you have any further questions or if I can be of assistance answering other questions."