Just out of curiosity, what could cause MAF counts to be much higher than expected?
I have a hitachi 90mm stock replacement MAF, in the stock 03/04 cobra airbox. I'm getting 1000 AD counts at ~50.3 lbs/min. I'm pretty sure t's not a problem with injector slopes, it's definitely not making the power to peg the MAF (350ish WHP on a dynojet through a 5 speed), it's just reading high for the air it's passing.
k constant is 30, SARCHG is set to 281 CID. green Ford 42lb injectors, slopes directly from the reference files and seem to behave perfectly - seeing 0.58 DC at 27 MHz.
thanks in advance for any help
90mm PMAS range
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SOAB_465
- Posts: 32
- Joined: 2022 Dec 06, 15:24
- Location: Alberta, Canada
- Vehicle Information: 1998 Ford Mustang GT 5 speed box code BAI1, CRAI8
stock return fuel system with Walbro 255 in-tank pump and aeromotive adjustable regulator.
2008 4.6
PI Heads and Cams
9:1 forged pistons
Forged H-Beam Rods
60lb Deka injectors
BA2800 MAF
2.3L whipple supercharger intercooled approx 13 PSI
- tuning with TunerProRT
PLX Wideband
GM 3bar MAP
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red5.0fogger
- Posts: 150
- Joined: 2021 Mar 22, 15:58
- Location: Newington CT
- Vehicle Information: 1986 Mustang GT, Stock block, TFS 170 Heads , N41 cam, ported cobra intake, nitrous, T5 , 3.73s
Re: 90mm PMAS range
50 lbs/min is is about 500 hp. I think you mean 50 kg/hr... Around idle speed or just off idle?
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SOAB_465
- Posts: 32
- Joined: 2022 Dec 06, 15:24
- Location: Alberta, Canada
- Vehicle Information: 1998 Ford Mustang GT 5 speed box code BAI1, CRAI8
stock return fuel system with Walbro 255 in-tank pump and aeromotive adjustable regulator.
2008 4.6
PI Heads and Cams
9:1 forged pistons
Forged H-Beam Rods
60lb Deka injectors
BA2800 MAF
2.3L whipple supercharger intercooled approx 13 PSI
- tuning with TunerProRT
PLX Wideband
GM 3bar MAP
Re: 90mm PMAS range
No it's lbs/hr. It's a twin screw supercharger setup, TunerPro is calculating about 470 hp in the data log, but I thought these MAFs were good for a bit more than that.
The low output to the tires is another question I have, but it's fun enough for now so I'm just driving it.
The low output to the tires is another question I have, but it's fun enough for now so I'm just driving it.
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decipha
- Posts: 5051
- Joined: 2021 Feb 15, 12:23
- Location: Metairie, LA
- Vehicle Information: Work Truck
'19 F-150 3.3L
Re: 90mm PMAS range
nope, that's about all its good for