Umm...Hello?
Echo: Repetition of a sound by reflection of sound waves from a surface. Very noticeable in an empty room, or even a dead thread...
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MY FAVORITE EQUATIONS:
Fuel Volume = (HP * BSFC) / (# of injectors * IDC)
CFM = C.I.D. * RPM * V.E. *.5 / 1728
P.R. = (PSI Boost + 14.7) / 14.7
HP = TQ * RPM / 5252
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