Those who are also following the Berk exhaust thread know that my baseline dyno session didn't go so well today. The goal was to get a new baseline dyno since the last time I dynoed the car was back in February after the Berk HFCs. Back then the weather was probably in the low 50s here in Vegas, I had different wheels & tires, and I had the stock intakes. I wanted to get a fresh baseline before dynoing the Berk Cat-Back and UR crank pulley since now the weather in Vegas is 110+, my current 19" Forgestars are heavier, and I have the JWT intakes.
Well for those who remember way back when I tried to get my first baseline when the car was 100% the first go was not good. The torque curve had massive spikes and it looked to be either detonation or a problem with the dyno. I got a new tank of gas from a different gas station and went back the next day to the same place and got a good read with a much better looking torque curve.
Unfortunately it looks like history is repeating itself. I went today to get my up to date baseline and it was the same old story with torque curve spikes that don't make sense. This time the air fuel ratio was also a little leaner than I would have liked, possibly due to the intakes. I put the stock intakes back on for just in case that was the cause of the leaner A/F ratio. I will do what I did last time again and get gas from the Chevron down the street instead of where I normally go and see if it fixes it again. I will re-try my baseline tomorrow at 2:00pm again.
Here is the sheet from today for those who are curious.
Since the whole point is to see how much gains the Berk cat-back and UR pulley make a good solid baseline is key. That is not what I call a good solid baseline. Also notice that the numbers are ~15whp lower than what they were back in February. Although some of that probably has to do with whatever issue the dyno or the car has, I also attribute a lot of that to the Vegas heat. I miss winter.
