Actually, I believe that my system is injecting about 80% of what the total Gasoline quantity is. In other words, if my gas consumotion is 216 lbs/hr them .80 X 216= 172 lbs/hr of alcohol. The exact figures may not be written in stone but it should give you an idea. I figured the above from the fact that I have 6 - 36 lb/hr bluetops working to the max and I converted my 2 alky nozzle sizes from their gal/hr ratings to determine how many lbs/hr of alky I was flowing. I did this some time ago and am not sure exactly what nozzle sizes were in the car. Heck, I can't even remember what sizes are in there now (I think its a 13.5 and 11 gal/hr though). The actual flow may be less than the actual rating of the nozzles but the alky can surely be somewhere around 50-80% of what the gasoline is. I should do a new flow test and actually remeasure these cause its been awhile. I also plan to install an alky pressure gauge but I never get around to it. Anyway, the mixture ratio of the alky/gas might easily be 1:3 or stronger for the systems that most people use as far as I know.