12.4 was a 2.0 60 foot and not tryng hard. I made 2 passes on fuel. They were crappy passes. Even the guy at the Dyno shop did the math and said wow those numbers don't make sense now pay me.
Not trying hard? Come on...
Math is just that....I'll keep watching for proof. I do agree it's not a 500hp truck but that also leads me to think maybe there are some other issues with the setup?
What does backpressure look like?