EFIDynoTuning Forum

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

50 lbs/min is is about 500 hp. I think you mean 50 kg/hr... Around idle speed or just off idle?

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.

nope, that's about all its good for