From my experience with EFI and Meth, you have to look at the sensor and the controller and see what the minimum lambda they will read. most 02 controllers will read down to about .70 lambda or 4.5 meth scale. reason why i bring this up is i talked to Moran one time when i had issues with his injectors and we were discussing 02's. he told me that on his PM they are about 3.9 meth scale. he has been using the Big Stuff efi units for years and i guess BS has 02 add-on that will read that low. they use the NTK sensors, i think they are the medical grade? (guessing).. all i know is they are SPENDY...
my point in mentioning this is, i dont know what teh afr would be for meth on something like your going to run. but, if it will be lower then 4.5 then need to look at the sensor AND the controller as not all controllers will automatically read lower then 4.5 afr on meth scale even if the sensor will.
im gonna guess that if your only make say 1500-2k hp then i doubt your AFR wont go below 4.5 meth scale.
might look at AEM, Innovate, Altronics
Dean
