I've read that Ford uses air mass to state engine displacement.
Calculating displacement for the coyote engine I get .0015628 lbm (using Ford 100* and 29.92 inHg for dry air density).
I'm confused when I see the parameter Engine>General>Engine>Engine Displacement at .00167 lbm?
What have I got wrong?
2019 C7 Stingray M7 - long tube headers, 6.30/6.22 226/238 cam, supporting stuff, DOD and VVT delete.
Stock everything else
I get air density of .07090 LB/Ft^3 at 100*F. 5L is 0.176573Ft^3. .0709 * .176573= .012519 divide that by 8 and get .001565.
STP - commonly used in the Imperial and USA system of units - as air at 60*F (520*R) and 14.696 psia (15.6*C, 1 atm)
If I use air density at 60*f .08633 LB/Ft^3 I get .001685. I don't think the engine is quite 5L, 4.952L actually, which should account for the small difference. This value must be based on STP not fords usual 100*f and 29.92inHg.
Last edited by murfie; 10-13-2016 at 05:28 AM.
OK thanks, I bet the different standard temperature is the reason, I hadn't thought of that
2019 C7 Stingray M7 - long tube headers, 6.30/6.22 226/238 cam, supporting stuff, DOD and VVT delete.
Stock everything else
Yep, on the N/A engines, Ford uses a different temp.
Eric Brooks
HP Tuners, LLC
good to have that confirmation, thanks Eric
2019 C7 Stingray M7 - long tube headers, 6.30/6.22 226/238 cam, supporting stuff, DOD and VVT delete.
Stock everything else
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