Just had my 2012 5.0 dynoed today and I was gutted big time. I had suffered power loss since my first service. My vehicle is stock aside from a K&N CAI and it runs 3.55 ratio in the rear. I have been trying to get the stealership to recognize the power loss but they can't find an issue. To be fair, it runs well, but it had a firmware reboot at the first service and was never the same again. So I finally had it run on a dyno and this is what I got...
394hp @ 5543rpm.... (that's crank, and not rear wheel)
I had a sct tune and it made zero difference. It caused all sorts of problems with the ecu so I removed it. The K&N filter does not require a tune and claims 20 rwhp. I think a bit ambitious but even with a 5 hp increase over stock it would put me 25 odd hp behind the 412 benchmark. To be honest....it feels like I am missing 30-40 hp.
I live in a very hot climate...granted. But I run on 98 octane and it is at sea level.
Am I imagining things or am I just p**ssed my numbers are in Toyota land? Looking for validation here.
Oh....temp was 32dg C or 90F 40% humidity.
I feel the shame of the numbers on the wrong side of 400.