I know what you mean. Although I’ve out a good amount of cash into it so I’d expect it to perform as described.Nice! I don't worry about the dyno numbers, and just get happy with the new boost. My HPD supercharger is rated at 200 ish hp, but I'd be curious to see how closely a local dyno run matches up.
So I had the “fuel up” kit which included the 34mm restrictor, that actually was my first question to them. Whether they used the right restrictor or not. They confirmed they used the 34mm.I've had the mFactory LSD for a few years, and have really liked it
Did your tuner discharge the battery for dyno testing? Your peak torque looks in the ballpark and at a similar rpm to mine, but the whole curve seems to be an odd shape for our cars. Without the SC, peak torque should still be about 140 lb-ft but somewhere around 1500 RPM. If they dyno'd it without the electric motor powered, which this looks like, you are a lot closer to 180HP than 160. Electric motor is good for ~20hp up top based on what my car has done on the dyno.
Ran into the same issue with the primary cat causing too much back pressure once I got up to ~190HP. Mine's still sometimes a daily so have kept the cat so far. Did you end up deleting yours?
And apparently HKS uses a restrictor that is 27mm diameter to protect the engine from their base kit not being intercooled, but the intercooled version also comes with both 27mm and 34mm restrictors. Maybe they missed swapping those out? Your power rolls over at the top like their 27mm dyno, which is odd for a centrifugal SC without a lot of restriction.
HKS SC manufacturer's dyno sheet