Good thoughts, Kurt. On Oct 6, 2011, at 7:45 PM, Kurt Nolte wrote:
> I will say that, with a stock engine, the two EFI conversions I have been a > part of have provided approximately 25% bumps in mileage over the carbureted > version. > > One was a pickup, 80s vintage. 2.2L inline engine. Ran fantastically, owner > just got bored and wanted to put EFI on it (he also loathed the warm-up > period on the carb). We made it a "hidden" swap, using a Weber-look > carburetor replacement TBI unit. Swapped to Distributorless ignition with a > pickup wheel hidden in the pulleys and individual coils that I forget where > we hid them. > > He went from getting ~24mpg combined on the carbs to averaging 30mpg, mixed > city/highway. It was a Ranger-sized truck and he wasn't gentle with it (thus > the 24mpg. I got 28 in mine. :D). > > The other was a hopped up Beetle, 2035 engine, dual carbs, all that... > decided that he was eventually going turbo, EFI came first. Bumped mileage up > into the thirties from the upper twenties. > > The big benefits I see to an EFI conversion, as they relate to fuel economy: > > *"Intelligent" warm up: you don't have to bump the idle or dump in an > arbitrary amount of extra fuel to start a cold engine, and warm up is faster. > *Closed Loop Operation: lean when you need to be lean, rich when you're on > the power; carburetors require that you tune to a "compromise" setting. > *Automatically compensates for all kinds of wonderful environmental > situations. > *YOU DON'T HAVE TO TOUCH IT. Seriously. I hate working with carburetors. Not > because they're difficult, but because they're such babies and need you to > check up on them. > *Throttle response: most FI, because of fuel and spark mapping, is going to > be better on throttle response than an equivalent carbureted engine, meaning > that you need to reef on it less to get the same Whee!. > > > Anyone disagree? -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lovers@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
