skeptical old git
Hmmm. Assuming he was talking about US gallons (I'm talking Imperial gallons) he's suggesting you should use a pump that provides about 2.4gph. On the motorway you could easily be approaching 2gph.The 40105 is rated for 30gph and you only need about 3gph...
National Sales Manager
Motor Components, LLC
That seems way too close to the mark to me.
Also, though you may typically get 45-50mpg, you could use at least twice that much fuel at times. You wouldn't want to be going up a hill, two up, into a headwind using (guesses...) 5gph and have a pump rated at half that.
Put it another way, if you had a full tank (~5 gallons) and disconnected the fuel hose, how long would the it take for the fuel to drain out? If it drained in under 2 hours, then a gravity feed alone moves fuel faster than that pump
Another data point, a seller on ebay claims that the Felco pump they sell, rated at 50-55l per hour (or 11-12gph) is the same as the OE pump. I don't know if that's true, but it seems more credible than the claim that 2.4gph is the right fitment.
So it seems like the 40105 is higher pressure than you need, but probably something like 3 times too high rather than 10 times?