Originally Posted by
redhardsupra
ok, i'm gonna be a science stickler again...
check your units, what does g*K/(sec*m^3*kPa) simplify to?
you do know that IAT != MAT and that cylinder airmass from MAF is already done for you in the form of CYLAIR, right? so then to solve for VE, all you need to do is start with CYLAIR=VOL*VE*MAP/(R*MAT), and rearrange to isolate VE so you end up in the form of
VE=CYLAIR*R*MAT/(VOL*MAP)
if you want dimensional analysis of it done, it's a bit convoluted, but it checks out clean. it's all in my 'how SD works' from four years ago.