Thread: Looking for my maf airflow (32.54 lb/min) to hp conversion

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  1. #1 Looking for my maf airflow (32.54 lb/min) to hp conversion 
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    Nov 2020
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    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 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

    Sent from my iPhone using Tapatalk
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  2. #2 Re: Looking for my maf airflow (32.54 lb/min) to hp conversion 
    Killa Bee Scottydoggs's Avatar
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    Aug 2010
    new jersey
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    so its stock and some how now has 50 hp over stock? you would be lucky to have the 240 chp its advertised with being its got 200k on it already.

    that kr is not helping either. every degree of kr pulls 2 degrees of timing.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection
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  3. #3 Re: Looking for my maf airflow (32.54 lb/min) to hp conversion 
    GT Level Member mguzzo's Avatar
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    Dec 2007
    Buffalo NY
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    290 crank hp? Without a pulley change you haven't done a thing. the fact you're getting KR with headers tells me your timing and fueling are way off.
    Current '98 GTP Coupe: Still stock and rust free. That will change.
    Old '98 GTP Coupe: VS Cam, 3.0, S2IC, 42.5#, TOGs, N*/LQ4, Corsa. it once ran a 13 flat
    Older '98 GTP Sedan: Pullied, rockered, SSIC, etc. Stock 14.33 @ 96.5 / PB: 13.89 @ 101
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