I put a YSi-B on a car. It is pretty much a dog down low. A real high stall converter really woke it up. I'm guessing it makes 750-800 rwhp on E85 at 26lbs of boost. This is on a 4400lb Marauder. It has GT500 cams and the bowls cleaned up in the heads, pulleys are 2.75 blower and 18% crank max rev is 7k thru the EEC. And a 6" IC core really helped keep the temps down. Pretty mild build.
Here's a little video how the boost climbs. Shook the tires a little. Converter flashes about 4500.
Here's a little video how the boost climbs. Shook the tires a little. Converter flashes about 4500.