Whoa .. back up here a little Tony !! No one is trying to discredit you .. I just know that from 3 summers at the track w/ my 6.1, and hanging out with a lot of friends w/ 5.7's, that 13.10 does not sound doable w/ a bone stock 5.7..
When the first '08 Challenger SRT8's came out, Road and Track did a full test and 13.1 was the best they could wring out of it.. I just can't see how a 5.7 w/ an automatic (stock) can run the same times as a 6.1.. My Charger weighs about 4200 lbs and hooks real hard with the traction control off and hot tires..
Now if someone slipped a Predator w/ a CMR tune into your 5.7, I would have zero skepticism, but can't you understand the doubt here ??
Also, unless they did something wild this year that I didn't read about, 400 HP is not happening w/ the 5.7, as last year's models were 350 HP at the crank. My 6.1 is 425 at the crank, stock, w/ 420 ft lbs torque...
Kenny