After tuning on the dyno and seeing a lot of combinations and tuning for those combos, I've come to the conclusion that engine dynos are just like chassis dynos.
Every engine dyno will read different from the next.

There are so many corrections that can change the output of an engine, you can easily change the output of an engine just by changing the air temp correction factor on the dyno I tune on, that one is a superflow dyno.

So, yes, they probably got that much HP, but it's a bit stretched from the one I tune on in Nickens. That combination you mentioned above probably would have hit just above 500hp. Depends on the heads too, that's a whole other story on flow benches; btw, I've seen very well known heads not flow as much as they say, at least on the superflow air bench.

It's all about that high peak HP number most shops are concerned with.


As for the Tahoe putting out 272rwhp, LOL, just goes to show you the chassis dynos are just as bad from one dyno to the next. I've never seen a stock 5.3L make over 250hp to the wheels, maybe not even 240rwhp, at least on my superflow dyno.

So, are the numbers right, sure, on that dyno, but put it on another one, Mustang and Superflow for example, and I'm positive it wouldn't of put that much power out.

Nice numbers by the way

allen