04-09-2019, 03:09 AM
as you can see 3D maps are complex, and is why EFI gets on average 20% better fuel economy, over any CARB made.
no distributor made (non EFI distributor) can do that, no distributor is a 3D class device.
note how under heavy load, 58% the green area runs less advance that is because the cylinder pressures are huge, and the flame front is SUPER Fast and never wants much advance, and if you did it have less power, power is made after TDC not before, so load lines are very important here.
also EFI has a cut fuel mode no carb has.
so when you gun the throttle then back off, it cuts fuel, and spark may go retarded, (this cut fuel mode overrides the normal mode above)
the EFI system is very complex and has many modes, even cranking modes, hot , or cold engine and idle mode. and cut fuel mode.
all this plays out by modes.
no distributor made (non EFI distributor) can do that, no distributor is a 3D class device.
note how under heavy load, 58% the green area runs less advance that is because the cylinder pressures are huge, and the flame front is SUPER Fast and never wants much advance, and if you did it have less power, power is made after TDC not before, so load lines are very important here.
also EFI has a cut fuel mode no carb has.
so when you gun the throttle then back off, it cuts fuel, and spark may go retarded, (this cut fuel mode overrides the normal mode above)
the EFI system is very complex and has many modes, even cranking modes, hot , or cold engine and idle mode. and cut fuel mode.
all this plays out by modes.
http://www.fixkick.com