Can you trust a company that has trouble with arithmetic? In the 0-60 chart, they say that 5.2 minus 4.4 equals 0.6. Me thinks it should be 0.8.

Seriously, I'd like to know what boost level they were running for that dyno curve they show. The write-up says 8psi gave them 475hp and 500 trq, and the chart shows 442hp and 458 trq. Maybe the higher numbers were at the crank (not at the wheels), but the loss is only like 6%-8% (which seems low too). Or maybe they decreased the boost on the lower numbers. The website could be more clear for inquiring minds.

Also, I would like to see their dyno curves for RPMs below 3,000...

 

The 5.2 and 4.4 numbers are closer to .6 than you think. 5.2 is closer to 5.1 and 4.4 is closer to 4.5, so they say 0.6 sec difference. If they said 0.8 sec they would be misrepresenting the facts.

As for the hp/tq curves, the 500 and 475 are the output not the rwhp. The numbers they got from the dyno was a single dyno run, which we know is a good figure, but not exactly accurate which is why they run at least two. The 500/475 is more of an average.