[undy]

No insinuations here Brent, but big number sell engines for builders.

Unlike the major auto mfrs the small guys typically dyno their engines under ideal conditions, perfect equal length headers, ideal mufflers (if any), electric water pumps, no restrictive (Cobra typical) air cleaners, etc, etc. Take the LS7 for instance... In the Z06 it's rated @ 505 hp (SAE "J" I believe). I've seen the LS7 "crate motors" dyno'd locally and they typically dyno 570 to 580 fwhp, SAE) They're running identical motors as the Z06 is running too. A lot of people don't understand all the variances in dynoing the engines and assume apples to apples. I don't entirely buy or subscribe 100% to the "inherent" Cobra dyno inadequacies. IMHO, the engines would also dyno lower in a Moosetang or another "typical" car, not just the Cobra. My 505hp Z06 develops more rwhp than my 600hp 482 Cobra. I honestly believe, given an "optimal" installation it would still fall waaaaay short of it's 600hp rating.