My last post guys...

Monte: I believe you like Holley EFI, and I tuned FAST for 10 years. Well, I just became a Holley EFI certified dealer and spent an entire week at Holley (3 diplomas :^)) I have wanted to run alpha-N at idle for years but FAST can't automatically switch back to Speed Density - but Holley CAN! It's the Holley-preferred tuning technique for radically cammed motors that want to be driven on the street. I will explain the technical reasons in a paper that will soon be posted on my Technical Info page.

I have tuned many race engines including several blown alcohol and turbo motors and I have always used only Speed Density. No issues. But I wasn't concerned about the low end drivability. Start - stage - WOT. Controlling the injection end angle is a critical part of the equation which tuners will use if their system can do it (both Holley and FAST can).

Gregs: The laws of physics are the same, but EFI can use the capabilities a little bit better. On my dyno I tuned race motors with carburetors and produced good power. After those engines were converted to a smart EFI system I made about the same max power but I was able to tame the idle a bit using the above techniques with no cam change. In a race motor you design the cam for the engine/head combo and then tune as required.

Trendz: Yes

A wide LSA cam is a way for an EFI system that cannot do these things to run better on the street simply because idle is better. Its not much more complicated than that.