Thread: Trying to calculate hp from my mass airflow rate of 32.54 lb/min

My MAF Airflow rate with the mods listed below : 32.54 lb/min on a 60 degree day with 56% humidity, under hood inlet air averaging between 82-85 degrees at the MAF. Seeing 2.3 KR from 5700rpm to 6000rpm, with a slight blip of 4.0 from 5500-5700 initially. Any idea what my horsepower is based on that air flow number?

I’m thinking somewhere around 290 crank hp. I -sort of- logged the data in a screenshot from my dash command app I use on iPhone (all extended PID’s were purchased). The screenshot I can post after this won’t make any sense unless you completely 100% understand the layout of the Dash Commander data grid. I plan to get it dynoed but was just curious how accurate maf air flow to hp conversions are. Still on the stock 3.8 supercharger pulley, also this of course is a Gen V supercharger. Car has 198k on the engine and transmission. Thanks in advance and the current setup of the car as well as the screenshot, are shown below :

2007 Pontiac Grand Prix GT Supercharged 4AT (Bolt Ons, Mildly Gutted, “First Draft” Edition)

Changes to the car :

4 Inch Inlet Intake Filter

Autolite XP104 Iridium (-not- the normal copper 104's) plugs gapped to 0.050

ZZP Alternator Power Cable

ZZP 180 Degree Thermostat

ZZP Polyurethane Dog Bone Bushings

ZZP Polyurethane Upper Motor Mounts

ZZP Aluminum Transmission Pan

3 Inch Collector BHR Stainless Steel/Titanium Wrapped Headers

3 Inch BHR Catless Downpipe

3 Inch Catback w/ Cherry Bomb Glasspacks

EGR Bypass

TransGo Shift Kit

93 Tuned by Daniel Smuts

General rule of thumb to figure crank hp is multiply your lb/min by 10. That is of course a very loose figure, so don't get too caught up on it.