Fuel lbs/ hr
5600- 268
5700- 274
5800- 279

Bsfc
5600- .448
5700- .464
5800- .468

Afr
5600 - 11.6
5700- 11.4
5800- 11.5

Ok. Here's the fuel info on the 4150 sweep 11 and the 4500 sweep 13. On this second sweep the 4150 made 671@5600 as opposed to the first pull where it made 674.

I doubt I'd buy Pro Systems next time.

That's a pretty serious correction factor. Is the dyno shop at a very high elevation?

Doubt it. There were sensors in the room that were hooked into the computer showing atmospheric conditions. I also took pictures of the computer screen in case I needed to check what was showing and the cover sheet for the pull has the atmospheric conditions on it. I have corrected and uncorrected output on the printout. What are you seeing and what does it tell you? What figures should I be looking for ? I didn't question it since he just rebuilt the parts I gave him he didn't have much to gain by inflating numbers

holleys 80340 power valve an jet as needed cant go wrong

What does the uncorrected hp show? If his fuel flow sensors are accurate (doubtful) then your 671hp peak would only be 598hp observed. Thats over a 12% correction factor which is crazy. Unless he can calibrate his flow meters, I'd be more inclined to tune off the wideband and back it up with plug readings. I've never seen an engine combo like yours make peak power with that rich of an AFR. There's also something whacky going on if you do in fact have a 500rpm power band. Can you post a full sheet?

Which sheet do you want? The power output or...? I also have info from the other engine and combos as well. Probably won't be able to till tomorrow.

I have the power numbers here in the phone. Here's the 2 4150 pulls.

There should be one that shows uncorrected power, or shows what the correction factor was. Usually the weather station info will show the correction factor.