>the stock MAF is OK .ddn coulomb.eng.ohio-state.edu(diy_efi) I would go for flow with a 70 or 80 mm unit. One thing you must do is put a zener diode across the MAF and MAF RTN lines so as not to trip the computers overload protection. On Ford EECIV that is 5.0 volts Pat PDONLEYCOTT @ VNET.IBM.COM