chrs1313

iTrader: (24)

Using autotap i am see a highest mass air flow of 330g/s or 43.65 lb/min...i tried converting that to CFM using a density of air of 1.184 kg for 25*C...but the CFM comes out to around 590CFM at the throttle body/maf...

where did i go wrong...

JonCR96Z

iTrader: (33)

Based on some calculations in this thread your numbers are close given the temp.

http://forum.onlineconversion.com/showthread.php?t=253

chrs1313

iTrader: (24)

nice...good i am not going crazy...

so my cam only is seeing a max of around 590CFM at the throttle body/maf...good to know

JonCR96Z

iTrader: (33)

MAF out of calibration? Descreened/ported?

chrs1313

iTrader: (24)

just descreened 85mm...i was just wondering what CFM the maf and throttle body were seeing under WOT...

jimmyblue

iTrader: (11)

346 in3 * (ft/12in)**2 * 6000RPM / 2 = 601 ft3/min
in an ideal-filling, ideal-extraction world. So I'd say it
is ballpark right.

chrs1313

iTrader: (24)

yeah 591 CFM...who wants to guess the pressure drop over a k&n filter versus a stock paper filter...

I will run some tests on monday at work...

Sammyboy

iTrader: (9)

I'm interested......what did you ever find out?

chrs1313

iTrader: (24)

about the same...with possible the paper being less restrictive...k&n seems to be marketing bullshit