Last night at Super Chevy in Las Vegas (we were invited to do a Chevy vs. Ford thing), on our first pass we ran 6.339 @ 231.44. John had to pedal the car twice because of tire shake and still ran that number (1.00 60-foot time). Last week at Fontana the car ran .983, .986 and .987, 60-foot times. Weight is 2470 pounds with driver.
Yes, 52 psi, and yes, the compression ratio is 11.25:1. With 4-cams it's easy to do and not have detonation. The problem is that most mod motor racers set their cars up as if it was a pushrod (single cam) motor. Our total valve lift is so low that you would laugh about it, it's less than most street cams. The new 2011 Mustang 5.0L 4-cam engine has computer controlled camshaft timing. This means that you can set the engine up one way for the launch (when the boost is only 40 psi) and change the cam timing as the boost comes on. And the intake cams and the exhaust cams can be controlled INDEPENDENTLY from each other with the Motec computer.
We have these engines in our shop, thanks to Ford Racing. Right now our 4-cam 4.6L is making about 9 horsepower per cubic inch on gasoline. Wait until we turn the Coyote loose. The potential from this engine is unbelievable. When you see this engine disassembled, you would swear that it's out of a Formula 1 racecar, and it's a production piece. The computer controlled cam timing in the 2001 Mustang is set so conservative that the engine can make about 410 hp and still get almost 30 mpg, and be 100% emissions legal. The headers are full tube race headers, not those crappy shortys. The OEM throttle body is 80mm. I would not be surprised to see a sharp guy with an SCT tuner get 500+ hp out of this engine just be reflashing the OEM computer, with NO mods to the engine.