Sounds a little high to me but, that BTR Stage 3 is pretty BA.
I have the Stage 3, with lesser heads, intake, TB, and exhaust and made 420rwhp unlocked and 540rwhp on 62 jet.
I'm sure the DA was awesome on those pulls as well.

 

And peaks hp at 6000rpm. I'll just say the dyno was happy that day or a stroker fell in the engine bay.

 

I know, doesn't make sense. My BTR3 (with slightly ported 241's and LS6 intake) was still climbing at 6600rpm

 

What's the compression?

 

By the graph posted, the car peaked between 5700-5800...there's no way that cam with those heads on a 346ci would peak legit under 6500 without a ton of valve float. Something is way off.

 

I'm sure the car is a beast. Nice going. They are just dyno numbers and can't be compared to all the other numbers out there.

 

^ This.

 

It's also a Dyno Dynamics dyno , those things from what I've seen read high on the torque side for some reason. I'd go to another dyno to verify that claim.

 

Its because dyno dynamics dynos can be adjusted and messed with to read about whatever you want them to. I don't trust any dyno that can be "adjusted". DynoJet dynos are the standard b/c they read what they read and it cant be mucked with, unless you heat the weather station, which I am sure can happen. I loaf at a friends dyno shop who has a dynojet, that is known to be a little stingy. I have seen countless mustang dyno numbers, dyno dynamics numbers, and superflow dyno numbers that read higher than his dynojet on their normal settings, then outrageously higher on the "dynojet corrected" settings that the operators put in place to make people happy.

 

What about the correction factor?

 

Take it to TWO other dynos.....it will NOT make that same power. Especially NOT that torque......thats impossible from 346 cubes with no nitrous.

.

 

The correction factor adjusts for weather variables and tries to make the numbers as close to equal as possible given different conditions. one day it might add 2%, the next take a 1%...but as far as ive seen on a dynojet, it cant be changed. you can use SAE, STD, uncorrected, etc, but you cant say, instead of adding 1%, add 10%.

 

Isn't there a way to read the MAF and calculate HP?

Seems high to me.

When it runs 11.70 instead of 10.70, let us know.

 

Your MAF/calculated airflow curve (plotted out vs rpm) should match the HP curve. Converting airflow measured or calculated into "HP" is a very ballpark thing at best. Especially once you start running non stock intake setups, MAFs, etc...all bets are off pulling absolute values out of it.

 

It takes "x" amount of air to make "x" amount of power, depending on VE of course. But it will get you close.

 

I agree on that.... having a MAF calibration/calculating the airflow that is 100% accurate can be the tricky part. For what it's worth on my recent dyno that I made 435whp SAE (455 uncorrected), my calculated airflow was 49 lb/min or 370 g/s. General rule of thumb is 9-11 lb/min of air for every 100bhp.

 

450RWTQ at 3380 rpm? The power curve is very flat & also the peak hp/rpm as others noted.

I'd guess a stroker.