So I had met a local tuner a couple months back and finally got the car to him to tune. The car really needed a driveability tune especially at idle and I've been chasing this rattling noise under load for quite some time.
We swapped in some NGK TR6 plugs and he tuned it on his Mustang Dyno. Happy to say that the noise ended up being figured out. It was actually pinging. So the colder plugs and tune fixed that issue.
As for the power tune, he did a baseline run and it made 407 rwhp and 378 rwtq and after his changes it now made 433 rwhp and 397 rwtq. Now if your comparing to my older dyno #'s which are actually higher those were done on a Dynojet which apparently read higher #'s than a Mustang Dyno. I checked online and it's somewhere in the 10% higher range. So If you compare the Mustang #'s with the 10% difference of a Dynojet she should be making 476 rwhp and 437 rwtq which is right in line with what my stock cubed LS1 should make with the mods it has.
Funny thing is this was completed a few weeks ago and I've just been too busy to even drive the car so I have no indication if it drives better or if the power feels better. Anyways, here's the new dyno sheet:
