Macrobb
Full Access Member
I personally think that a good mechanical pump will outperform a facet e-pump. I'd like to do a side by side comparison, but on my dad's truck with facet e-pump, the pressure drops quite a bit from idle to wot. My '93s mech pump stays within a 2 psi range at all times, measured after the filter.
Remember - pressure change = timing variation
Remember - pressure change = timing variation